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General E46 Forum
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Old 02-12-2009, 10:57 PM   #1
inlinesicks
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Supercharger question

Would running a blower at around 8.5 psi drastically reduce the life of an engine or would it only make it wear a little faster, obviously not being red lined 50 times a day and being properly maintained. Also just out of curiosity, which engine would be able to handle more, the m52 or m54? Is there any difference in the internals? Thanks
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Old 02-12-2009, 11:23 PM   #2
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as far as internals, the 2.8L and 3.0L i believe have forged cranks which would be better.

you'll find better replies in the F.I. Forum if the site.
http://forum.e46fanatics.com/forumdisplay.php?f=41
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Old 02-13-2009, 12:03 AM   #3
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you wont see 8 psi on a centri supercharger until you hit redline..

in most everyday conditions, @ passing speeds 4-5psi is what I hit,with the smaller pulley, I notice I boosts earlier and compared to getting 3-4 psi at wide open throttle, I get 4-5 early and it builds..

you can have a 9.5psi pulley, and never hit 9.5psi ever...(prob hit it, burning out and spinning your tires in first..:p the first time you unleash it) but for passing i prob got 1psi more between 3.5-4.5k rpm

so its really up to you how long the motor will last..
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