Quote:
Originally Posted by ItsRandy
You spent $1,900 at the dyno shop and still have the same/similar problem?? The dyno guy should have been able to tell you if you have the wrong timing curve in the distributor. You said it was a new MSD distributor? The paperwork that came with the distributor should tell you what the current timing curve is, giving you a baseline so you know what you need to do to correct the timing issue, if in fact timing is your issue.
As has been said, there are a lot of different points of view when it comes to vacuum advance. In my case, my vacuum advance is not used. The GM engineers said not to hook it up and I get all the total advance I need. My motor runs great. I get way too much total advance when I use the vacuum advance.
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The engineers said not to use manifold vac for only one reason. Warranty!
So put a limiter on your vac pot to cut it in half down to 10 degrees.