Yep, base boost low... - Saab Performance Bulletin Board - Saabnet.com
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Yep, base boost low...
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Posted by Aaron Gilbert [Email] (more from Aaron Gilbert) on Tue, 29 May 2001 02:37:14 Share Post by Email
In Reply to: boost question, Cameron, Tue, 29 May 2001 01:14:52
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As Phil seemed to divine from the ether, you must have tweaked your APC. With a stock APC, you won't see 11 or 12 psi (probably not even 10) with a base boost of 3.5 psi. The base boost on my car was 4.5 psi, and before I started modifications, would get about 11 psi and that's it, on a good day.

Keep in mind that for the early 9k like ours, stock max boost is 11 psi, and stock base boost is 5.1 psi. I have added a barrage of upgrades over the past six months, such that I was getting 15-16 psi max boost. Just last week, I had newer engine put in, and the base boost adjusted to 6 psi. That 1.5 psi adjustment gave me a whopping 5-6 psi increase in the max boost.

On my '87, the line between yellow/red is 12 psi though. Thus, if your '86 is the same, stock boost will never get you into red..

I highly recommend the 3.0 bar FPR as opposed to the 2.8 bar FPR. It's significantly cheaper and much easier to acquire. I used both in my car, and couldn't tell any difference between the two, other than my car pinged less at higher boost levels with the 3.0 bar.


Aaron Gilbert
1987 9000T 257k miles

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