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Re: Euro M3 owner;Who did ur engine work and how.. (archive)

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Posted by Euro M3 owner on April 21, 1999 at 03:27:51:

In Reply to: Euro M3 owner;Who did ur engine work and how.... posted by DM3 on April 21, 1999 at 01:17:27:

Walter Sprecher,

An old Cosworth engineer (use to work on the house F1 engine that ran in the late '70 and early '80). He is very knowledgeable - but not very friendly and kind of greedy (well good people are rare and expensive in this business).

I have currently the following modifications, but I do change often.

- More aggressive cams shafts
- High compression forged piston
- Titanium valves and tapers
- Forged rods
- Lighter flywheel
- Reworked head
- Reworked airbox
- Changed O2 flow sensor
- Bigger injectors
- Bigger oil pump
- Special engine belt that suppress the cold gases recycling pump
- Hamann STW exhaust system with suppression of mid silencer
- Custom ECU
- Max Speed direct injection with "home made" air feeder tube (basically a big tube that goes from my spoiler to the filter).

Crankshaft is next inline, but one that will take +9000 rpm (machined and balanced) is very expensive (about 6000$). Engine then should go to +9000 rpm and get about +30 to +40hp (~460 to 470hp is next target).

Unlike a compressed or turbocharged engine, it is very reliable (the engine vibrates far less and is less nosy), but also much more expensive. You can still take to the street, no problem - you don't have to "lunch" the car at 6000 rpm - that's just a plain myth. Torque is not a problem, I don't use the car as a towing truck

One problem, under "full trust" I do about 260 km with 60 liter of Super Unleaded 98 - that's 23l/100 km. If I compute correctly, that gives me about 12 miles/gallon. On the highway (about 150 km/h) I do 400km.

So if fuel is expensive in your area (for me it is), watch out.

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