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You'll never get the same power... (archive)

[ Follow Ups ] [ 5-series (E28) Message Board ] [ Msg. Board FAQ ]

Posted by JamesM on January 30, 2001 at 10:51:30:

In Reply to: good engine advice for rebuilding? posted by josh smiley on January 29, 2001 at 14:11:26:

They have custom cams, injectors, head porting, patented valves, and custom chips. Be lucky if you get your car back to its original power output after a rebuild. MM has cut up a lot of heads to find out how to port them corretly, and spent many hours of dyno testing on exhausts, cams, and chip tuning. This is not a Chevy engine--it takes a lot of work to improve what BMW has already done. Don't get me wrong--improvements can be made, but it's not as easy as dropping a Holley carb and intake on a small block.

Having said that, install a cam, 9.5:1 pistons, and get a chip tuned by Jim C. As for the exhaust, you'll have to put out more than 225 HP to upgrade the existing system. It is rather quiet and hassle free. A custom system will not be so suave. Get a 3.45 or 3.73 diff.

$2500 for an engine rebuild is pretty good if it includes parts and labor, but don't expect a huge jump in power. MM's price on the 3500Hi-Flo ST Sport engine is actually quite reasonable, considering the level of modification. You get a reworked oil pump, water pump, cam, dual valve springs, ported head, high comp forged alloy pistons, lightweight wristpins, and countless items that you nor I would ever think of. They've been in the business for a while. Those that have the MM engines really like them. I've considered one for a long time, but I bought an M5 instead ;-)

Speed costs money--how fast do you want to go??

Ed Teller--How's your MM Stroker engine??

James
[email protected]
88 M5
88 M3
83 535i


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