Originally posted by z31maniac
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yeah, they're the same. the way to get more than 3.1l is with a larger than 86mm bore, but if it's worth it or not? who knows. -
-OK, how about this:
stock s50us (3.0 @ 86x86) -240 hp
m50 w/s50 cams, m54 internals (3.0 @ 84x86.9) ??? hp (stock m54 is 225hp iirc)
-will the extra stroke make a big power difference? All other things being equal of course...1989 cirrisblau-metallic 325iComment
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Go higher compression, GOOD cams, and good exhaust and you can do it.Originally posted by Jean View PostComment
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What CR and Cams should I shoot for?
Thanks!Mtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205
OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827Comment
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I don't know what I thought I read in this thread that lead me to believe the M54 crank had a longer stroke than the S52.Originally posted by nando View PostNeed parts now? Need them cheap? steve@blunttech.com
Chief Sales Officer, Midwest Division—Blunt Tech Industries
www.gutenparts.com
One stop shopping for NEW, USED and EURO PARTS!
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I dont think you need cams to reach that. Stu made 235rwhp on his setup with stock cams.Originally posted by PiercedE30 View Post
As time went on, the factory developed the car each year, making it faster, more comfortable, and capable of handling at higher speeds.
You don’t want this. You want the trickiest, most dangerous, oldest model you can find. Only then can you prove to the world that you’re a man.Comment
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Well, I'm running 11.7:1 and can easily use 93 octane. I would say either 11.5 or 12.0.Originally posted by Jean View PostComment
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And to add another thread with good info - http://www.r3vlimited.com/board/show...t=m50+s50+camsMtech1 v8 build thread - https://www.r3vlimited.com/board/sho...d.php?t=413205
OEM v8 manual chip or dme - https://www.r3vlimited.com/board/sho....php?p=4938827Comment
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-So much conflicting information...
-How can you safely shave the head/block to get such high compression, and not have cam timing issues?1989 cirrisblau-metallic 325iComment
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Who said anything about shaving anything?Comment
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hahahaOriginally posted by SpecM View Post
You got me. I think I meant just to check the chamber cc to make sure that everything was right if you deck the head.Comment
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1989 cirrisblau-metallic 325iComment
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There is a BMW spec. You won't run into cam timing issues though (think about how you time the cams, if you do it right, the timing does not depend on the distance from crank to cam) you will have valves hit pistons or pistons hit valves or whatever.Comment
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Yea. Set everything the way it should be and the slack in the chain will be taken up by the tensioner. Since the main timing chain doesn't directly drive both cams (separate chain between the cams) it shouldn't have any effect, unless you shave the block to the point where the are mere thousandths between the deck and the top of the coolant channels (literally have to take off close to 3/8 of an inch) and it is close to becoming an "open deck" block. But at that point you are already screwed. Since the valve seats are already fairly close to the surface of the head, at the edge of the combustion chamber, there really isn't that much you can take off of it to make a radical change in timing.Comment
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