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If it's the same as on the 900, then...
Posted by Jeff Cunningham (more from Jeff Cunningham) on Tue, 1 May 2001 12:43:32
In Reply to: Don't have such a valve on '86 and '87 9000T.., Aaron Gilbert, Tue, 1 May 2001 00:48:42
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It makes a huge difference by disconnecting it. Not only in MPG but in engine horsepower. I did some tests and it will advance the timing 10' maybe more, there were no more marks on the flywheel!
I also noticed a huge power difference.
Since I use MSD-BTM for retarding the timing during boost, I bought a 1984 vacuum advance unit for $50. This gives me the advanced but no retard.
1984 was a lpt turbo and didn't need retard.
You can also purchase another 1-way valve that is on the valve cover. It allows vacuum but no boost. This will limit the device to only advance and no retard.
Jeff & Royce's SAAB Extravaganza
Posts in this Thread:
- ?'s on distributor vacuum advance/retard on 88 9kt, p-loc, Tue, 1 May 2001 00:43:06
- Facts on distributor vacuum advance/retard on 88 9kt, RJ, Tue, 1 May 2001 11:38:09
- Wow, that's really interesting..., Craig, Tue, 1 May 2001 01:21:09
- Don't have such a valve on '86 and '87 9000T.., Aaron Gilbert, Tue, 1 May 2001 00:48:42
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