HMS Window Blanket for BMW Convertibles

Pros: Provides additional protection for the delicate and expensive rear plastic window.
Cons: Harder to fold and store because of the bulkier design
Cost: 39.95

BMW created a device we owners quickly named the “window blanket”, it was a simple yet functional blanket that draped across the rear window and protected the window from scratches when the top was folded down. But the one thing the BMW blanket didn’t do was stop the window from creasing when the rear window folded incorrectly (with a wrinkle). HMS improved the BMW design and took it one step further by adding a bulky area to middle of the blanket which makes the window fold in a more rounded way in order to keep the window from creasing. It also appears HMS used a heavier fabric so there is some additional padding associated for the entire area that the blanket covers.

The bulky area appears to be filled with beans or something similar. The added weight from this bulky area forces the top to fold correctly and keeps it from folding to sharply (which can cause creasing). The improved design works better than the original design in protecting the top from these creases but there are some trade-offs. The HMS design is harder to fold and store because of the extra padding. The padded area is divided into three sections so folding it width wise is limited to three three sections. With the original BMW blanket I kept it tightly folded up and stored in one of the pockets of the trunk organizer. However with the bulkier HMS design this was no longer possible. I end up rolling it lengthwise and laying it in the area behind the center console. This might actually be a better location since it helps remind me to use the blanket when I want to put the top down.

I’m trying to get in the habit of using the boot cover and HMS blanket more often since I was starting to see some wear and tear on the plastic window. For this reason I like the HMS blanket more so than the BMW blanket. It keeps the top folded correctly and provides additional protection for the delicate and expensive rear plastic window.

Sold By:

HMS Motorsport

(888) HMS-3BMW

Michelin Pilot Sport Seen On a 2000 2.8

Visited the local BMW dealership yesterday, and while waiting for theie service department to take a look at my car I had time to walk the lot and take a look at the local Z3s. I saw a few things I had not noticed or seen before so I thought I would share them with you. (click on the pictures for a larger view).

Over in the used car section they had about eight Z3s, most appeared to be 1996 and 1997 models. This particular white Z3 had a black pinstripe that started on the hood and looped around the back of the car in the area between the cockpit and the trunk, finishing on the other side of the hood. Interesting look, but small sections of the stripe were missing so it looked kind of tacky to me.

Further down they had a white M roadster with a hardtop. This is the first time I had seen this particular combination. All the windows had dark window tint including the top section of the front windshield. The interior was red, which I think looks great with the white exterior.

They even had a couple used boxsters on the lot. A salesman approached me and asked if I would like to take a drive. I told him my M roadster was in the shop and I was just killing time but he offered one more time so I decided to take it for a ride. It had been a long time since I test drove a boxster and I was killing time so why not. When I tried to lower the top it didn’t work, salesman said some parts were on order. I started it up and kind of chucked at the squeak the clutch made, it was almost as bad as the squeak my clutch makes. Driving it off the lot I was reminded how much I hate the transmission in these things. Shifting from first to second feels like a foot long throw. The acceleration is good (but not M like), however the exhaust note was great. Handling felt similar to the Z3, except the boxster felt bigger. Lots of interior squeaks and rattles hinted to me that this particular boxster needed lots of TLC and I was surprised to see it only had 20000 miles (felt older). After the test drive the salesman said I could move from the M to this boxster for not much additional money, because they only wanted 42,000 for it…. I told him I would stick with my M.

Speaking of overpriced cars, can you believe this M3 Convertible with chrome wheels had a 52,000 dollar sticker price. Ten grand more than an M roadster or M coupe, somebody explain this to me.

Saw this beautiful steel gray 2.8 with the 17″ tire package that hadn’t even been unwrapped from shipping yet (note the temp cover over the top). One very interesting note is that this 2.8 had the new Michelin Pilot Sport tires on it, I assume this is a hint that the future 2.8’s with the 17″ package might get the new Pilot Sports as well. As an M owner I should point out that it appears the 2000 2.8 now comes with far superior tires than the M roadster’s Dunlop-sided SP8080 tires.

Made one other observation that I hadn’t noticed before. The 2.8 lower bumper has body colored paint in the front grill while the 2.3 has an all black grill.

Laguna Seca

The Night Before – Preparation time! I checked and topped off all fluids and set the tires to slightly over track psi because there is not air at the track… it is better to have too much then to little. You will adjust these at the track. If you have been running on the same air filter and oil filter for a while you might want to swap these out. Make sure to bring water and possibly some bananas. Tracking is a very tiring de-hydrating exercise and the getting a leg cramp at the wrong time can be fatal! Luckily a friend warned me of this. Unfortunately I wasn’t warned about the need to bring tools. The tech session described below outlines this problem. Don’t forget the helmet and get lots of sleep.

5:30am Alarm – Ouch! I woke up, drove from beautiful scenic Salinas to Laguna Seca. On the way to the track, I filled up the tank of gas. Don’t forget to do this, because track gas, if available at all, is very very expensive! You will use a full tank at an all day track event.

Doug Peete7:00am Laguna Seca Racing Paddock For Tech Session – Here the cars were checked to make sure they are in good working order. Being a guest of the Miata club made things a bit difficult because they didn’t have the tools required to inspect my car. My recommendation to guests at other car make’s events is to make sure you bring a full set of the appropriate sockets and wrenches, a torque wrench and any manuals required to prove you are using the proper torque settings. Also make sure that all of your car’s fluids are at the proper level (don’t overfill) and are not leaking.

Foggy MThe tech session was also a good time to size up the other cars at the event. I would guess that we had nearly 50 cars at the event. While every form of Miata from stock to supercharged was well represented there were also a few other “oddballs”. Namely we had: a vintage Shelby 350, an early ’90’s Mustang 5.0, a C4 Corvette, three Porsche Boxsters, three Honda S2000s, an e36 M3, an e34 M5 and a Ferrari 355. Woohooo! It is very neat watching and listening to the other cars turn laps.

* Some tips for the beginners at their first track event: Remove the floormats and any loose items from the cockpit. I ditched all of the items in the glovebox, the items in the cargo net, the items in my Leatherz armrest, the mobility kit in the trunk and all of the tools.

* The side windows were required by the track to be down. I also found I preferred the top down and I used the tonneau cover to make sure any “agricultural excursions” didn’t result in a dirty liner.

* Ear plugs are highly recommended (yes, in addition to the helmet) as the wind noise will scare you into driving slower due to the perceived speed from the wind noise. Don’t worry, you can hear the engine, brakes and tires just fine with the ear plugs and the helmet.

* Get the tires to the right pressure. I had the tires at 34 psi from the night before and dropped them to 32 psi at the track. Street use for my setup is 30 psi.

* Dig into a banana and water… it is never too early to start hydrating.

8:00am Class – Class consisted mostly of describing proper track etiquette (hand signals for passing and indicating a lowering of speed as well as thanking the corner workers), the flag system in use for our event (my head hurt from cramming in all of the flag meanings) and a short introduction to the instructors. We also were divided up into three groups ranging from first timers (me) in Group C to the old pros in Group A. The entire day was divided into 20-minute sessions that rotated the Group which was on the track.

* To sum up a few points: Our Flag System (Not the definitive flag system!!!):

o Green – go,go,go

o Standing Yellow – proceed with caution & no passing

o Waving Yellow – danger ahead, proceed with caution & no passing

o Blue with Yellow Stripe – passing is okay

o Red and Yellow Stripes – surface problem on track, slow to a stop and await instructions from track worker

o Red – some sort of major problem, slow to a stop and await instruction

o Black – you did a “no-no”, proceed to the pits for a talking to

o Checkered – final lap, no passing cool down lap

* Always give some waves or thumbs up to the corner workers on the final lap. They spend all day in their boring towers keeping your butt safe, so thank them on your cool down lap!

The Starting Grid

9:00am First Lap – The first session is a very slow “follow the instructor lap”. Speeds are kept to under 50mph. The main goal is to learn the proper lines to take on the track. In 20 minutes we were able to get several laps around the track. Tip: In the starting grid try to get as close to an instructor as possible. Remember the “telephone game” where a large group gets into a circle and someone in the circle whispers a message to the person next to them and that person passes the message to the person next to them and so on until the message returns to the recipient. The message never is the same when it returns to the first person… such is the follow the instructor game – the car behind the instructor takes a slightly sloppier line, the next car is sloppier and the next is sloppier still.

Also, the speeds on the first lap are very slow. At slow speeds the lines demonstrated by the instructor don’t make sense and seem exaggerated – they aren’t! At this point the best thing you can do is turn on your mental tape recorder and record the lines… you will be happy later on when you are at speed and the lines begin to make sense. Not following these lines will result in an “agricultural excursion” for you and your car.

The track initially seems docile until the back set of laps starting with a left turn resulting a quick elevation change up, a flat tight ess turn followed three-story plummet of an ess turn known as the Corkscrew. I never knew that racing consisted of elevation changes as well as the usual left/right turns. Driving along on the flat ess and then watching the road literally disappear from sight is an unnerving feeling!

* Some tips for the beginners at their first track event: Never ever set your parking brake following a session. This can cause warped rotors.

* Always give the car a cool down run after the session. I usually took my checkered flag lap at 8/10ths except for 1 or 2 of the turns which I really wanted to work on and then would follow my lap with a slow run around the parking lot inside the track to get the engine and brake temps down.

* Have some more water and chant the following mantra “I will not cramp, I will not cramp…”

9:40am My First Session In An Instructor Car – Ace driver and tuner, Rick Weldon of PR Motorsports – Hayward gave me a ride inside his race-prepped Miata. The car was an early model Miata stripped of many of the interior parts, outfitted with a tuned suspension, a tuned intake and exhaust and ready to roll at just over 2500 pounds and 140hp. A reasonable power-to-weight ratio, but the beauty was watching Rick drive. While there wasn’t any lap timing going on, it was easy to see that Rick’s performance was several seconds faster than ANY CAR on the track… high performance German and Italian metal included. The old adage that the first nut that needs to be tightened is the one behind the wheel is very true. It was hard to notice actual speeds during the white knuckle ride, but Rick was easily able to pile at least another 5 mph on top of my speeds through the Corkscrew!

It was amazing to be in the car with Rick as he told me how to approach each section of track. Again my brain recorder clicked into the Record Mode so that I could attach his sound bytes to my track visuals I was also mentally recorded. Throughout the rest of the day I replayed Rick’s words over and over to encourage myself to find the same smooth flow that Rick showed me on the track. Rick also provided me with one really neat experience… the final lap of our session he told me to narrate the flow of the lap as he had been doing throughout the previous laps. This really helped cement all of his words permanently into my mind. I am not sure if this is a standard instructor tip, but it was an awesome way to prep me for my next lap. Thank you Rick! Tip: Get an instructor ride ASAP so you can feel the right flow around the track! Just following the line in the first lap didn’t give me the insight in to the track that the ride-along gave me.

10:00am My Second Session – No instructor this time. This session was mostly a get acquainted with the track driving session. My laps were slow as I learned the lines and learned how to get a good “scan” (Rick’s vocabulary) of each section. Proper setting up of a turn starts with looking through the turn, then scanning the corner workers for flags, scanning for other cars, and then sighting through the turn again. The scan took some practice to perform initially but quickly became routine and can keep you out of trouble by respecting the corner worker’s flags.

The Starting Grid

10:40am Rick Drives The ///M – Wow! Rick took the wheel of my car and gave me a ride as the instructor of one of the advanced sessions. It was incredible to feel what the car is capable of in the proper hands. Rick seemed very impressed with the capabilities of the car saying that it is a really solid and balanced vehicle. The current limits of the car were more based on the stock pads (he experienced a bit of fade) and tires (he drives DOT approved racing tires on his Miata) and not mechanical. It looks like I know what my next upgrades will be!

11:20am My Third Session – I finally started to get a better feel for the track and was able to begin picking up speed. It was during this session where I began pushing the car into some drifts around turn 2 and turn 3. Despite the Stage I Dinan suspension, I could still feel the car tending to understeer in the drift, causing me to drift farther to the outside of the turns than I wanted (am I just rationalizing the adjustable roll bars in addition to the new pads and tires Rick recommended? Nah!)

On a related note, the engine in this ///M pulls just as bly as any car in the straight aways. On this lap I spent time with both the GT350 and the Ferrari and neither was able to pull an inch on the ///M. Also when I came off the track, several people commented on the exhaust note the car generated. “Your car is the coolest sounding car on the track!!!” Very cool indeed. Apparently the GT350 was louder, but the Dinan Cold Air Intake made an insane growl for the spectators standing in the pits. All this despite UPS losing my Supersprint (yes, it currently is lost… it scanned into Oakland Airport and never made it out), so I was running the stock pipes. I need to get a video camera so I can tape this next time. Anyway, whether the Dinan Stage II chip/Cold Air Intake make any horsepower is mute when these products make the car sound better then the Porsches and Ferraris with which you share the track.

Straightaway1:00pm My Fourth Session – Following lunch, we get our fourth session. Basically things start coming together on this lap. My times were consistently faster and I start learning how to four-wheel drift in turns. Just as I am starting to feel good about my experience an e34 M5 passes me with a 3 passengers in the car. Luckily it was an instructor driving, so I don’t feel too bad, I think an instructor could pass me with a bicycle! Another good reinforcement that it is the driver and not the car that makes for good laps.

My increased speeds and harder breaking really begin to heat up the stock pads. I began to feel a bit of fade towards the end of my laps. In order to avoid the infamous brake rotor warping, I take my checkered flag laps at a slightly lower pace, so the car can breathe. And hey, it is easier to wave “thank you” to the flag workers this way. Also, I drove the car for a slow victory lap around the inner-parking lot following the last lap to further blow cold air onto the brake rotors and the engine.

2:00pm My Fifth Session – The session was late because the Mustang drops some radiator fluid onto turn 3 which promptly sent an M3 and a Boxster into a spin… luckily into runoff areas without any damage. This was a great reminder that even a perfect driver can and will eventually find themselves venturing off the track. Tracking is full of random occurrences and about the only sure thing is that something strange will happen. Pay attention to flag workers and remember how difficult it is to explain to your “significant other” over the telephone that half of the car is in turn 2 and the other half is in turn 3.

After the track was cleaned (I didn’t see how) we began our fifth session. I couldn’t see any remnants of the cleanup, but we were kept under a standing yellow flag for the first two laps. This was a good time to cruise the track reminding myself of the proper line without worrying about speed and other cars. The next laps were some of my best yet, but still far from the laps Rick had in the ///M. Rick offered to sit in with me for a few laps so I pulled in and took him up on the offer. He was able to quickly identify new areas for me to concentrate on and corrected several bad habits. I should have taken him up on the offer sooner in the day since there was only one last track session for me to apply his recommendations to. The specific advice I received is moot… the instructor will give you the advice you need. Make sure you get an instructor to ride with you at least twice in the day (once in the morning to talk you through the track and then once late in the day so they can correct any bad habits picked up throughout the day.

2:35pm The Witching Hour – Late afternoon at track events is commonly called the witching hour. People are tired from running hard all day and are a little too comfortable with the track for their own good. One of the Miata’s in the Group A class (the top class) pushes it too hard in turn 2 and ends up bending a tie-rod. Apparently something always happens during the witching hours, so don’t let it be you. If you find yourself going through the motions, check yourself. Maybe it is a good time to pull into the pits and get some water and a banana!

2:50pm The Last Session – Best laps of the day by far… I even finally got a good line through the backside including the Corkscrew and turn 9, a weird off-camber turn that looks easy but somehow is quite challenging.

3:15pm The Day Is Over – Time to drive back to the East Bay. What a day!

Turn 3

Dynamat on ///M Coupe Subwoofer

The bass is noticeably better. I purchased a pack of 5 square foot pieces which was enough to do the whole job. Eastwood’s 1-800-345-1178 item number 52105 $19.99. Each square foot weighs aproximately 10 ounces. About 3 pounds added weight substracting the scrap.

– From the Dynamat Literature –

Dynamat Original is a Styrene-Butyadine-Rubber based and Pressure Sensitive Adhesive Backed, Heat Bondable, Sheet Metal Vibration Damper. This product is made to conform and fuse to automotive body surfaces such as floor pans and doors. Product shall be die cut to shape and placed onto the body surface after sheet metal cleaning operation and prior to the paint system (typically at the sealer application operation) or on painted panels. Adhesive side is smooth, giving complete contact with the underlying surface without any air pockets of channels. Both material and adhesive can withstand temperature ranges between -30C to +177C(-22F to +350F) and are highly resistant to aging.

Acoustic Properties

The acoustic loss factor ‘n’ is used as a measure of ability to damp structure-borne sound. It states how much vibrational energy (in steel sheets, for instance) is converted into heat rather than sound. For constructions containing several layers, the combined loss factor ‘n comb’ is used. The theoretical maximum loss factor is about 1. An undamped steel panel 1 mm thick has a loss factor of roughly 0.001 at 200 Hz. Damped with Dynamat Original the loss factor would be about 0.16 at +0C(32F). Multiple layers of Dynamat Original can be used to improve sound daming still futher.


Dynamat Original is used as treatment for metal panels, partitions, ducts, doors, bins, panels, etc. in railroad cars, buses, automobiles, and ships. It is also used for ventilation ducts, relay cabinets, steel furniture, sink units, office machine, computer equipment, machine tools, and for many other purposes.


Dynamat Original should be cut to the desired size and shape before the backing paper is removed. It may be cut with scissors, knife, or die. Remove dust, grease, moisture, and other foreign matter from the application surface. Peel off the backing paper. The simplest application technique is to bend the pad slightly and attach it along its shortest edge. The pad is then pressed firmly into place, preferably with a roller for larger pieces. This reduces the risk of leaving air pockets, which reduce the sound damping capacity. The temperature of the pad and application surface should not be below room temperature during fitting. Heating the material before applying is strongly recommend, and increases flexibility, strechability, and adhesion.

Clear/White Front Light Replacement

An Illuminating Project – Front Light Install

It’s a kind tradition in the BMW world to replace your orange blinkers with white lenses. I’m not sure where this tradition came from. Perhaps it’s just a way of selling more aftermarket parts, but it certainly makes the car look cooler!

I succumbed to white light fever a while ago when I replaced everything except the front lighting pods following the instructions on this article. The new clear rear lights looked really great. The effect of the white lights was not so much as an addition of anything, but more of a subtraction of an annoying other aspect of the car. On a black car like the Manx, it really helped to smooth out the lines. But there was still something wrong — the white lights looked great, but there were still those annoying orange ones in the front pod. They became even more annoying when I switched to yellow fog lights. Too many colors. However, at the time, the cost of replacing the front pods would have been close to $600. For that, I could live with a little annoyance.

But then things changed when BMW released the Y2k Z3’s. White lights were now standard on all Y2K Z3’s. In addition, they have decided to make the white lights available for all US models. This brought the price down to $500. Let’s see, 20% BMWCCA discount and we’re at $400. Hmmmmmmm. May be a possibility…. The final straw was when Zeroster posted that a Circle BMW was running a sale on the white lights at $344. $344! For that price I could not resist. A quick phone call and the lights were on their way to me.

The lights came about a week later. The interesting thing was that they included not only the main headlamp units, but also the various side markers (which I had already, but they’re not very expensive, so it didn’t matter — now I have spares). The lights came complete with bulbs as well, all-in-all a very good deal. Of course, you also get those cool multi-lingual instructions which are really, really helpful (honestly, it amazes me that BMW has not figured out that it’s main market being the US, the main language (the one which accompanies the pictures) should be English.

It’s quite easy to remove the lights. All you need to do is remove four screws. the problem is the re-installation of the lights. That’s where it gets tricky.

First of all, start with the driver’s side of the car. The passenger side is harder to remove because of the washer fluid reservoir. You should remove the the top two screws first. However, there’s a special precaution to take: The screws do not go into metal. BMW have developed an incredibly Rube-Goldberg-esque system for attaching the lights to the body which also serve as aiming devices: the enclosures the screws fit into actually screw and unscrew themselves into the body of the car. If you unscrew the screw-sheath, you can move the light. Before attempting to unscrew, place a wrench on the screw-sheath to stabilize it. The wrench will hold it in place, preventing you from seriously changing the alignment of the lights as you remove them. This works well on the two front screws, for those in back, you need to get a bit more creative. I used the flat blade of a small screwdriver to stabilize them, but even then I could feel them moving.

Once the lights are removed, you can simply reach behind them and unplug all the bulbs. You then position the new white lights and reverse the process. If you have not changed the positions of the screw-sheaths, everything will be pretty much aligned and you’ll be ready to go. Before you do, however, try this simple test: Take a small piece of cardboard and run it under the lights. If you encounter any resistance (like the light is resting on the body of the car) you will need to take them out again and realign the screw-sheaths in the back. Once you are done, close the hood and make sure the edge of the lights line up with all the body parts. Sometimes, you just need to play around with it until you get it right. The first time I did it, I removed and reinstalled the lights in about five minutes. When I noticed they were not aimed properly, I did the procedure again and it took me about 30 minutes per side, but the alignment is perfect.

Another tip – when you get to the passenger side you’ll need to complete the install with one last screw down the back. The problem is that the screw need to be positioned before you can tighten it and there’s no way to get back there because of the reservoir of washer fluid. I solved the problem by taping the screw to the driver using the handy-man’s secret weapon: duct tape. This allowed me to position the screw and complete the install.

The final results is exquisite! The White lights look great — for only $344 I’ve completely removed that annoying orange from the front of the car. The replacement lights are BMW OEM, but there were some differences. The new lights did not have the cool liquid/bubble level and it seems to be missing a vestigal gear. The purpose of this gear seems to be to mount to a motor in the car. Many european cars actually allow you to change the aiming of the headlights from inside the car. They allow you to raise and lower the lights depending on your load. This is particularly critical in soft-sprung French cars, but somewhat wasted in the firmer German builds.

1.9 ROAR “RAM-AIR” Intake

Pros: Improve sound and performance, carbon fiber components and shield to hinder recirculating hot air intake
Cons: Vague installation instructions, intake system enclosed in engine compartment
Cost: $348

Despite the discontinued sales of the 1.9 Z3 in the US, there are many 1.9 owners who want added performance and most of all who still love their cars. With this in mind, there has been a slow start of third party manufacturers that offer upgrades and modification(s) to these loved but not forgotten Z3s.

Presently, there are a few manufacturers who offer an ‘air-intake’ solution to the 1.9 Z3. According to a previous article on the MZ3.NET, the K&N filter charger has some inconsistent performance results. THe K&N filter charger successfully addressed the restrictions in the stock intake allowing more volume of air to enter the engine. However the flaw with the K&N filer charger system was that the source of intake air was the (hot) air trapped under the hood of the Z3. While the intake was allowing more air volume to enter the 1.9 engine, the actual air mass varied greatly depending on the air temperature under the hood. Because of this flaw it was actually possible to loose engine power. (In case you haven’t caught on, cold air has more mass than hot air). Because of this, many Z3’ers (especially those living in hotter climates) avoid in installing such a design in their vehicles.

Since I received the DINAN UPGRADE for my 7/97 build 1.9, there has been no answer as of yet for the release of the DINAN COLD AIR INTAKE SYSTEM for the 1.9 since its debut for the 6 cylinder Z3s. Because of this I wanted to see if there are any third party companies that offer such a system for the 1.9 besides the K&N filter charger. I came across a company called “ROAR” ( that offers such a system for most BMWs including the 1.9 Z3. Though fairly new to the name I decided to call and investigate what this company offers and stands for: I called the company and left a voice mail message with them explaining my interest in their air-intake system for my 1.9 Z3. Two days later I received a call back and spoke to a very nice and enthusiastic sales manager of Roar named Scott. He was very friendly and excited to explain to me how their air-intake system functioned and how it was designed. He welcomed the challenge of putting the ROAR air-intake system against any other system designed for the BMW Z3.

The ROAR intake system is similar to the K&N filter charger system in that it addresses the air flow restriction of stock BMW airbox. Where the ROAR system differs is that it also addresses the problem of air intake temperature, by providing a carbon fiber shield that helps reduce the engine’s intake of hot air from inside the engine compartment. The construction of the Roar air intake system is mostly comprised of carbon fiber due to its low relative heat absorbence.

Review: After installing the Roar “Ram-Air” Intake System to the DINAN equipped 1997 1.9 we put it up against a 1998 1.9 which only consisted of an exhaust upgrade (Supersprint). Both Z3s being tested are manual and had no passengers in the vehicle. The test consisted of both 1.9s cruising head-to-head at 50mph in 5th gear. Once each front nose were equal we then cued each other to accelerate without downshifting. Both of the 1.9s remained head-to-head up until we hit 60 mph (3600 rpm) and the 1997 DINAN equipped with Roar system pulled out ahead of the 1998 Supersprint exhaust 1.9 by almost half a car length. This concluded that the ROAR system with the DINAN upgrade improves performance at higher RPM.

Other test(s) included 0-60mph runs recorded before and after the installation of the ROAR system. With a passenger operating the stopwatch, four runs were record before the installation and four runs after the installation. The results showed that after installing the ROAR system with the DINAN upgrade, the 0-60mph timing was reduced almost 3/8 of a second.

Note: testing in this manner resulted in extra weight due to the timekeeper sitting in the passenger seat. It should also be noted that potential human error is possible, due to the time it takes a human hand to start and stop the stopwatch.

Stock 1.9Roar Intake Installed

6 month update

With the Roar Ram Air System installed and after few thousand miles later, I have concluded that I am quite happy with my investment. The performance gain is a plus as well as the sound. The sound will be noticed when the engine is at load as opposed to a constant, maybe annoying, low resonance sound.

The journey of the Roar installation

After leaving several messages with Scott at Roar and no return calls, I received the package on the very day that was discussed during the sales transaction. With the help of Carter Lee (CTG) and Fred Byrom (Teachum) we immediately looked at the contents within the package and read the instructions. Let me first tell you that the instructions were vague and offered no pictures of installation. This is not a plug-n-play upgrade for those who are not ‘handy’.

Fortunately, with the help of Carter and Fred, the three of us made the installation procedures a lot easier. The first step is to remove the stock air box: unlatch four(4) clips which removes the cover and after doing so the box itself is only held down by two(2) 10mm bolts. For more detailed instructions on the removal of the stock BMW airbox, please see this article on MZ3.Net.

Tools Needed:

* 10mm socket and wrench

* 10mm bolt

* 2.5 in drill bit and drill

After complete removal of the stock air box:

* The next step is to mount the mounting bracket (a) to one of the existing posts where that previously held the stock air box. You can use either the same bolt that held the stock airbox in place or use another one.

* Take one of the filter(s) provided and spray oil on the outer shell. The oil is located in the white aero-spray can that is provided. Do not spray the inside of the filter. After spraying the filter, place it within the funnel system and tuck the filter underneath the carbon fiber nose to hold it in place.

* Get ready to drill a 2.5in. hole into the air-intake system (b) for the temperature sensor location. There should be a rubber boot for allowing the temp sensor to be inserted. The boot acts as a tunnel/bridge connection from the air-intake system to the temperature sensor.

* After mounting part (a) you then will need to install two (2) rubber washers (provided) to size match the filter system (b) prior to installing it. After this, you can insert the filter system onto the the Z3’s hose intake located where (b) is on the picture. Once installed (remember it is going to be a tight fit so you can use water to moisten the rubber washer for easier slip) you want the mounting bracket (a) to have its clamp to hold the very end (located where the Roar filter system and the Z3 intake meets) of the filter system.

* Once the clamp is successfully holding the system (do not tighten at this time) take (c) vacuum/valve cover and insert it to the air pressure vacuum hose located where (c) is on the picture. Position the vacuum/valve cover opening tilted opposite from engine (there will be a filter opening and you want it position towards the driver’s side opposite from engine). After the above steps are installed, tighten the clamps just enough so its stays in place (do not overtighten).

* Next step is to locate the temp sensor. After completing the drill, making sure it will be snug, plug the temp sensor into the rubber boot on the air-intake system that was placed.

Taking out the stock box Stock box removed Roar Bracket

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