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Date: 13 Dec 2004 23:13:24 GMT
From: Dave Hinz <>
Subject: Re: 99 Turbo update - vroom vroom

On Mon, 13 Dec 2004 23:41:51 +0100, Frode <> wrote: > Dave Hinz wrote: > >> I thought it was just as it crossed over into the red boost, but it may >> have been also when I hit 6K RPM. I'll check tonight rather than second >> and third-guess my second-guessing. > As you may have noticed, the 99T has a quite unusual boost control system > that actually senses and controls the exhaust manifold pressure via a > rubber diaphragm regulator. At high RPM's, (max BHP is at 5000 remember), I > would expect that the added back pressure from the exhaust system will keep > the needle away from the red area. If the rubber diaphragm is in good order > and the wastegate valve isn't stuck, that is;-) Ah. I have no exhaust system on the car right now aside from the header, and that has leaks. >> It's been a dozen years since I drove (a/this) 99 Turbo, until yesterday. >> The steering is a bit heavy, but it's a _very_ fast/responsive rack. >> Handles good, even on not so good tires. I plan to put on more than 3 >> miles tonight, but since it hasn't moved on it's own power in more than >> a decade, I'm going gently and cautiously. > And double-checking that the wastegate is operational before you go all the > way could be a good idea. I am on my second tranny and third head! A > bicycle-pump will help you in revealing any leaks and perhaps you can hear > the shaft moving as well. How do I check the wastegate with a bicycle pump, please? Dave

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