i have seen several threads on this same subject, but they seem to all be wishy washy, or go off topic. I was just contemplating getting a 272 cam for my 87 325is, and was wondering what i could expect? im hoping i could see another 15 hp from this cam? thanks r3v!
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you probably need to be more specific, because usually when you get a a larger cam, u should have other modifications such as a MAF, larger injectors, and a proper tune.
obviously you are gonna gain power, but what is your ultimate goal?1989 325i SETA stroker [delphin] R3V'd 8/31/2011
1989 325ix [zinnoberrot] $OLD
1970 2002 [Nevada]
Originally posted by Herr Faust SchinkenOriginally posted by ak- -
I would enjoy a 15hp increase from the cam. I am going to have a Conforti chip, 20lb injectors headers(most likely ebay) to a megan racing muffler and hopefully an extrude hone intake manifold eventually, but cam is next on my list.sigpicInstagram: bir_madhatter
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The gains are hard to nail down from throwing all those planed upgrades in. Only way to know 100% is to dyno, but I see no reason why with that list and a proper tune chip will not get the gains you're seeking.
I highly suggest new b25 valve springs with the cam. I also think you should run a 17.5lb injector from the M50. They will handle the 272 and upgrades perfectly.~ Puch Cafe. ~ Do business? feedback ~ Check out my leather company ~
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You can probably get 300whp easy NA with a 272˚ cam and eta intake manifold-AlexComment
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They don't usually tell you this in the manual but if you put the sticker that comes with the cam on your hood... sorta askew down near the front it adds ~10rhp on a good day.Originally posted by e30guydownunderComment
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-___- thanks to the few who gave me good info, and thanks for the ones who gave me a good laugh!sigpicInstagram: bir_madhatter
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I love this place.~ Puch Cafe. ~ Do business? feedback ~ Check out my leather company ~
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Current cars:
~ '87 325 M30B35 swap
~ '87 535
~ 01 540 Msport 6spd
~ '06 X5 4.8isComment
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So, i don't want to take up more bandwidth, but i have a question, would a 288 or 284 cam be ok to be driven daily? And i can only assume the power would be much greater right?sigpicInstagram: bir_madhatter
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89 E30 325is Lachs Silber - currently M20B31, M20B33 in the works, stroked to the hilt...
new build thread http://www.r3vlimited.com/board/showthread.php?t=317505
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Before spending money on a cam, I'd suggest assessing the condition of the engine. Compression (dry & wet) and leak down tests will tell how much wear there is in the engine and where it is. If the results show the cylinders in good condition, you can frequently pick up 10-15hp on a 150k engine by a good head refresh (3 angle valve grind, new or blueprinted cam). If the cylinders have over 15% leak down numbers, new rings and cross hatch honing of the block should be seriously considered.
Case in point. I bought a 120k mile engine out of a 525i (auto) for a previous SE30. The numbers (on a dyno jet) were disappointing, 143rwhp. Compression numbers were pretty good, but leak down numbers were 20-30%. That car got destroyed late in the season and the engine was torn down and rebuilt while I built the new car. It did get an overbore because the cylinders were past the wear limit and the head was carefully rebuilt. The car then made 162rwhp on the same dyno. That is a 19hp increase just from making everything in the engine right and using a bone stock engine management system (mods aren't allowed in SE30).
I got similar results on my 150k restoration project (an 87 325is).The car makes it possible, but the driver makes it happen.
Jim Levie, Huntsville, ALComment
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