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M52/S52 power... (archive)

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Posted by JamesM on May 16, 2001 at 15:47:06:

In Reply to: Have you considered... posted by Jon on May 16, 2001 at 11:28:53:

This is exatly what my friends at bimmerworld are going to do once the SCCA season is over. You can use a 2.8L aluminum M52 block, bolt up a US S50/52 head (if it fits), S52 crank, install headers, cams, Euro MAF with Conforti software, OBD-I ECU and electronics, etc. If you had to use a cast-iron block, you could bore it out to S52 specs for a 3.2L displacement with a 1996+ M3 crank. There were about 37,000 US M3s made, so I don't think they're a hard find. You can get a whole S50 US M3 engine from bimmerworld right now for $6k.

Robbie Kollar has a prepared-class E36 M3 with cams, headers, OBD-I, Jim C sofware with Euro MAF conversion that puts out 311HP at the crank. A stock 1995 US M3 engine puts out about 270 crank HP with the Jim C software and Euro HFM. Actually I keep saying Euro MAF, but it's the same as a US 540i.

The M50/S50 engines are a much easier fit. The guy who made an E30 335CSi (S38 in an E30) had to shoehorn it in. You can get more power than the S50, but the big-six block weighs a freakin ton. I had one stripped completely, and I couldn't lift it myself.

I would suggest using a US M3 engine. They're esy to find, there are lots of mods available, and they can make great power with TORQUE, one thing a $12,000 280 HP S14 engine LACKS.

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88 M3
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