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View Full Version : 2002 BMW M3 - Bored & Blown



mikeyb
01-18-2008, 09:20 AM
There's something compelling about this 560whp supercharged M3 with a 3.4 liter Bored motor.

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<table class="MasterMainTable" cellpadding="0" cellspacing="0"><tbody><tr valign="top"><td rowspan="2" class="MasterLeftContentColumn">
</td></tr></tbody></table>The owner of this Imola red '02 M3 was previously a player in the import scene. In fact, he still owns a 350Z turbo. Yet 28 year-old Ronnie Cheung from Sunnyvale, CA inevitably saw the light and bought his first Euro. Except he was a little wiser than many who take their first tentative steps into Euros: He was smart enough to buy a project car that formerly belonged to Eurobahn Performance.


As you probably know, building a project car is a labor of love. You pour gallons of blood, sweat and tears into the car, as well as a ton of money; money you'll never see again when it comes time to sell. Few of us are prepared to pay for somebody else's modified car, not wishing to take a chance on buying a potential nightmare. Yet this attitude permeates down to our own projects when it comes time to sell.

Those who are brave enough to take a chance on a modified car are often rewarded with a load of mods for almost no money.


For example, at an early stage in this M3's life, it received an RMS supercharger. Over time, both the motor blew and the supercharger apparently failed, so Eurobahn sent it to Axiom Race Engineering.


We're told the Axiom crew addressed the blown motor with a set of CP pistons matched to Eagle rods, retaining the stock forged crank. With a damaged block, it made sense to bore the block slightly, allowing them to stretch the motor's capacity to 3.4 liters. They also machined the pistons to drop the compression to a boost-friendly 9.5:1.

Up top, the head was ported and polished. A set of Ferrara valves and springs were also fitted with a three-angle valve job.


The carbon fiber RMS intake remains, while the exhaust is Supersprint from the headers to race cats, X-pipe and the stainless steel muffler.


The next job for Axiom was to recreate the supercharger kit, which they did with a Vortech V2 blower. To feed the beast, the ignition timing was altered within the stock ECU, while a Split Second PSC1 works on the fuel supply. It's assisted by Split Second's AIC1 that controls the secondary bank of six RC440 injectors. These are mounted on a separate fuel rail under the painted aftercooler and squirt into the throttle bodies.


The aftercooler itself is essentially a water-cooled plenum chamber, replacing the plastic factory plenum. As the supercharger pushes pressurized air into it, the air is chilled by water that's circulated through the cooler and back into its own radiator mounted behind the front spoiler. Such aftercoolers (or chargecoolers) are very effective, and not as prone to heat soak as conventional intercoolers.


Because the car spends its life in southern California, Axiom also decided to swap the stock radiator for a Fluidyne unit, and fit a separate oil cooler.


The transmission is BMW's paddle-shift SMG. While it remains stock, there's a lightened flywheel, six-puck clutch and a Quaife diff with lower 3.91:1 gearing for even better acceleration. "First gear is so short it barely reaches 25mph," Ronnie reported.


The Vortech blower is currently producing 12psi boost pressure, allowing the motor to make a claimed 511whp at 7800rpm on 91 octane fuel. Running 100 octane its seen 560whp, which is almost double the output of a stock M3.


Apparently the car's very fast, but speed isn't everything to Ronnie. "What's nice about this car is you can drive it every day. It's happy in traffic, but if you want to go fast you just hit the gas and it goes crazy," he said.


"The ride is really comfortable; it has a plush interior and it's a nice car to drive. The only problem is the extra injectors. These run rich on cold-start, so it idles unevenly until the engine warms up," he continued.


With such a potent motor, Eurobahn took the precaution of fitting Brembo brakes all round, adding 14" rotors up front and 13.5" rear. Both are grabbed by four-piston GT calipers, as you'd expect.


Upon delivery, the M3 sat on Eibach springs, which Ronnie combined with Koni adjustable dampers. He contributes much of the car's ride comfort to these struts.


When Ronnie took possession of the car it was mechanically complete, so most of his energy has been devoted to giving the M3 some visual muscle to match.


One of his first tasks was to select 19" Kinesis K19R wheels. He had the centers powdercoated Phantom black, which gives off a slight pinkish tone in the light. This started off the car's red/black theme, but they aren't purely for show; at 10" wide on the rear, it's allowed the new owner to fit meaty 285/30 Toyos under the rear to control those rampant ponies.


Since he'd chosen to contrast the red paintwork with black accents, it was inevitable that carbon fiber would figure somewhere. In fact, it's everywhere, from the vented Vorsteiner hood and rear diffuser to the MVR front lip. You'll even find it on the kidney grilles and side gills.


Carbon has also infected the interior like a rash. You find it on the instrument surround, door handles, dash and console. It's also on the e-brake handle, shift knob and the shift console, and found its way onto the SMG shift paddles and the steering wheel they sit behind.


uropean Auto Source supplied much of the carbon, with additional items coming from JLevi Streetwerks. Although Ronnie confessed he'd shopped around so much he'd forgotten several suppliers.


Talking to the owner, it's obvious that despite it's impressive spec, the project isn't in full swing yet. We learned of plans to add side skirts; "But I haven't found any I like yet."


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mikeyb
01-18-2008, 09:21 AM
I need to change my undies!!!!

seanmcsean
01-18-2008, 09:21 AM
I hate the hood and the carbon fiber interior trim, but everything else is delicious.

mikeyb
01-18-2008, 09:28 AM
I hate the hood and the carbon fiber interior trim, but everything else is delicious.

The hood is a replica GT-R hood. I like it. The CF interior is alittle overdone. But the owner likes its. I think I would have done stainless steel trim and a CSL trunk lid.

aMaff
01-18-2008, 09:30 AM
I need to change my underwear.

mountjonas
01-18-2008, 12:00 PM
...and a CSL trunk lid.

I was about to post the same thing.

Tom03es
01-18-2008, 12:05 PM
Yeah, not too fond of the carbon fiber interior- much like how I don't like the stuff available for the Protege. The rest of it is pretty much badass though! Tommy-likey!!!!!

avarela86
01-18-2008, 12:11 PM
car just doesn't do it for me (dunno)...Don't like the color nor the rims. 560WHP Woot but that's it from me.

SilverBulletES
01-19-2008, 03:54 PM
All the carbon fiber shit it ugly. But I'd love to have that motor in my E46. Although I do enjoy my excellent gas mileage if I stay off the pedal.

NCZ13
01-19-2008, 04:37 PM
the carbon fiber knob is funny to me

i assume its a weighted knob, but its wrapped in CF. kinda redundant if you think about it

boostdog
01-21-2008, 11:39 AM
love everything about it!