I figure since I built the whole m50 for turbo as a 2.5 I should built the top end to rev to say 10k. What do I need to change/ get. new valves, springs, and retainers? anything else? Has anyone been to the land of 10k in a m50?
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" WHY DO YOU NEED 300HP TO DO THE SPEED LIMIT?" -
If you spin an m50 to 10k you'll probably send a piston to the moon. -
you're gonna need a rb20 for that kinda revving lolsigpicComment
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really? so even with a hardened crank and harden pistons. its still not happening?"fashion is not something that exists in dresses only. fashion is in the sky, in the street, fashion has to do with ideas, the way we live, what is happening."
-- COCO CHANELComment
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From what I've read in some track forums, the first thing to do would be to get a spare engine or two. The head isn't too hard to improve, but the bottom end likes to come apart when run significantly higher than the stock rev limit.The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, ALComment
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Save the money you would spend on this towards an s54 swap for your M3. You can thank me later should it ever crawl out of "basketcase" status and be up for sale.Originally posted by ogbimmer View PostComment
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Why does the bottom end like to come apart? The stroke is actually pretty short, shorter than a toyota 4age and that engine can rev pretty goodDrive it hard. Maintain it well.
Convertible Technical & Discussion
A Topless MemorandumComment
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There's a lot more than just stroke that comes into play when attempting to run a motor at 10k rpm. The biggest hurdle is the weight of the rotating assembly in which the m50 is much heavier than the 4age. (it has 2 extra cylinders worth of pistons and rods for instance ;) )Comment
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Not to mention the timing CHAIN spinning to 10k. Damn"!!NASA
BMWCCA member
PCA member 25yrs
1991 318IS slick top
1997 M3 sedan
2001 325CI DD
“whoever turns the wheel the least, wins"Comment
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smelt the engine and rebuild it as a ferrari engine hohohoComment
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Just shift from third to second at rev limiter you'll get to 10kLast edited by Myster-E; 07-18-2011, 04:26 PM.1988 E30 335i - 1987 E30 327i - 1987 E30 327iS Pickup - 1973 2002 Project
Visit www.BimmerHeads.com for all of your 12 valve needs!Comment
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How many times do you want to rev to 10k?Lorin
Originally posted by slammin.e28Comment
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Full body armor.Comment
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You should imagine what could be plausible in a M/S50 longblock, realize you were asking a purely rhetorical question and not at all prepared for the $20K bill, and stick to a K20.
Ed1988 E30/S50...now with S52; Track
1994 Miata R; ES Solo2
1998 Lexus LX470; Wife (Slee'd anyway)
2002 BMW 530i; A+ Commuter
2002 BMW 325iT; Sport/Premium 5-speed
2011 21' EconoTrailerComment
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