3.9L M30 Stroker

[Robin-535im]

Metric Mechanic sells one for $8k-$9k.

I confess I stole the idea from Jeff N... but I bet I could build one myself for cheaper, maybe slap on a MM head with the 294 cam and the fancy-schmancy uber-flow technology surface roughness feature Jim talks about.

1) anyone have a used-up M30 short block they want to sell? How much?
2) anyone here ever do this before?
3) should I add an oil cooler?

The DME should do just fine with bigger injectors and a custom chip and/or piggyback ECU.

If anyone's ever done this or heard about it, please pontificate.

TIA

Robin

[bjl4776]

I have a shortblock from the 3.3L M30 from the e28 if that would work?

[Robin-535im]

AFAIK, the difference between early and late M30's was mainly in the head, but the displacement being different may mean that the bore was less. Shouldn't matter if I bore it out anyway. What do you want for it and where are you at? I'm not ready to pull the trigger quite yet but send me a PM and we'll get in touch off line.

- Robin

[AllanS]

Didn't PatP in FL do something like this on his turbo 535i? Not the Alpina one, his other 535i turbo

I think he had it out to 3.8l with a ported head on top.

[Paul in NZ]

what block does the 3.8m5 use????what are the dimensions of that motor vs the 535???

[Mr Project]

I also have an extra M30B32 block from an E28. I'm in Lincoln, NE, and the price would be VERY reasonable. E-mail me if you're interested. armenb1 AT juno.com

[cary]

Pass on the Metric Mechanic Stuff. Their theories are nice, but in actual practice don't work well. I have heard story after story about their motors not making close to the claimed output, having cranks break, etc. If you want more power follow tried and trued methods for modding the M30. I believe you can bore to 3.6 or 3.7 liters and DR. Shriek makes cams (keep it small with injection).

[bahnstormer]

turbo would be cheaper and more powerful anyway =]

[Robin-535im]

turbo would be cheaper and more powerful anyway =]

But for me it's not "BMW-enough". Adding a turbo goes too far from the way a BMW should be. When they put one in the 745, they used a different piston and stroke... just slapping on a turbo doesn't make me feel right.

Like I said, nothing wrong with them in general, and I don't mean to offend people with turbos because they probably make your car wicked fast. People may mod to their own tastes... but it violates my sense of the car spirit of natural induction.

[bahnstormer]

NA is def a very cool and respectable way to go...
but it takes a lotta cash and two brass ones....

power per dollar FI is gonna beat NA.....

however may i suggest korman....they have
a 250hp carburated setup for the m30 ....?