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Join Date: Apr 2010
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Turbo Boost Quits

A few days ago I noticed my 86 Turbo is not reaching full boost. It spools up normally but wont go past the second "THIN" line closest to the 2. It just seems like it has been adjusted to not go past that line. No matter how I work through the gears, It seems to always peak at that same line.

Any Thoughts?


Old 09-02-2012, 09:20 AM
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Incorrigible
 
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Quote:
Originally Posted by Guest1287 View Post
A few days ago I noticed my 86 Turbo is not reaching full boost. It spools up normally but wont go past the second "THIN" line closest to the 2. It just seems like it has been adjusted to not go past that line. No matter how I work through the gears, It seems to always peak at that same line.

Any Thoughts?

That should be full boost at the stock settings. 2 bar on the gauge (1 bar above atmosphere) is more than stock, like 14psi is stock I think...

Jeff
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1988 951 all track modded and angry, 2002 Boxster

'88 924S, '65 912/911, '86 951, '79 924, '85 944 N/A, automatic - all gone.
"It makes me sad. Our cars were meant to be driven, not polished" - Ferry Porsche while surveying a concours field.
Old 09-02-2012, 10:05 AM
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You should see about 1.7 bar on the factory gauge or about 11psi.

I recommend getting a 2nd boost gauge, the factory gauge resolution is pretty poor and not very useful for troubleshooting.
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Jon
1988 Granite Green 911 3.4L
2005 Arctic Silver 996 GT3
Past worth mentioning - 1987 924S, 1987 944, 1988 944T with 5.7L LS1
Old 09-02-2012, 10:38 AM
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It used to hit the 2 bar and get a bit more boost than it does now. I have only had the car for about 7 months but I wasn't aware that it wasn't supposed to max out at the 2 bar. I was planning on getting one of those Lindsey Boost Enhancers to get it back to hitting 2 bar again. Is that a good Idea?

Old 09-02-2012, 01:34 PM
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