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And yet another counterpoint..
Posted by Aaron Gilbert [Email] (more from Aaron Gilbert) on Wed, 6 Feb 2002 12:36:31
In Reply to: Re: Which modified APC should I get? I have a 93 900t with, chrisx, Tue, 5 Feb 2002 16:31:33
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I'm inclined to agree with ChrisX (not so counter there). My problem doesn't appear to be fuel though, or should I say, the problem I'm experiencing don't jive with what the A/F curve on the dyno said. According to the dyno, I was way to rich, to plenty rich enough, all the way up to 4500 rpm at least, maybe 5000 (water injection helps). However, I'm getting boost kickback via the great APC at well below the point I start to lean out. Say, I'm at 3000 rpm, right in the sweet spot, and I nail the throttle. It'll hit 17ish psi almost immediately, then it's anyone's guess as to what happens next. If the moon is right and the stars are aligned with my dash gauge pod, it will hold that boost and just slowly taper back to about 12ish psi by redline. If the moon's wrong, immediately after hitting peak boost (so still just over 3000 rpm), the Absurdly Picky Controller will drop the boost back to 10 or 11 psi. If I keep my foot in it and haven't corrected for the misalignment with the universe, it may jump back up to 17 psi, but immediately drop back down. Repeat.
Could be a timing issue, I suppose. I did verify over the weekend that the H2O injection is working. Timing _should_ be 10 BTDC at max boost, which should really be enough retardation.. ah well. MBC at 14 or so is looking better and better..
Aaron Gilbert
1987 9000T 270k miles
posted by 206.191.139...
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