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JFairman JFairman is offline
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Join Date: Jul 2006
Location: S. Florida
Posts: 7,274
I left both vacuum lines on the '87 USA distributor and turned it clockwise advancing it as far as the adjustment slot allows without pulling the distributor out and reindexing it one more gear tooth.

I'm scared to remove the vacuum retard line so far because I don't know where the timing would go under boost then. Just too risky.

I need to get some kind of degree wheel or tape that can be attached to the crank pulley and has the degree marks on the edge so it will be visable when pointing a timing light down at it before I experiment with timing safely.

At the moment I have the MSD 8762 set to retard timing 2 degrees for each psi of boost starting at 5psi but I will probably change that a little with more experimenting. I run maximum boost 1 - 1.1 bar or around 15 psi with street gas, usually chevron high test.

The motor has stock 7:1 pistons and cylinders, 964 cams, Garretson long neck half bay intercooler, and B&B headers.
It has fuel enrichment with a modified IA fuel head and Brian Leask adjustable WUR to control it.
Old 11-16-2009, 10:12 AM
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