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Re: Getting Partial Boost for my! (archive)

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Posted by Bob ///M3 on February 12, 2000 at 10:51:46:

In Reply to: Getting Partial Boost for my! posted by CoolM3 on February 11, 2000 at 23:27:05:

You say you're making only 3.5lbs of boost at 6,000 RPM; how much are you making at say 3,000 RPMs?

If you have 6 or 8lbs of boost at 3,000 RPMs (for example) it could be you're SC is doing all it can at the higher RPMs. If you have some proof that at one time it has produced a higher boost (at higher RPMs) than what you're seeing now then no doubt you have a problem. If this is true I'd first check the wastegate and then next check for vacuum leaks, etc. Many SC and turbos produce ample boost at low to mid RPMs but simply give out at the higher RPMs.

Bob ///M3

: Hi,
: I have a 98 M3 with ERT's Vortech SC unit and I have just recently added a
: boost gauge to my car, due to suspicion that my car is not making full
: boost. And well, what do you know? Confirming to my suspicion, my car was
: only making 3.5lbs of boost at 6000rpm. Now here is my question, what could be
: causing this? Bad connection? wrong crank shaft? what?! I have been trying
: to figure it out with my bare naked eyes and I couldn't see anything wrong
: with my setup......pls help!!

: CoolM3

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