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i would think it clutch rpm drops with ds and is pulling motor rpm down it need less base. on the cars i have worked on engine rpm and clutch rpm...
you can buy a cheap set or radius gauges from MSC or another tool supply place
75lbs and it was happy @ 32-33 @40-45 lbs of boost
I ran the same combo for years once we went over 33* 34* in timing it would from time to time lift the heads and push out a head gasket.egts and...
triged out pattern and dialed it off on my DRO used .500 058 wall 4130 tube for the bushings
Thanks Robert lol last time i ran a blower it had a offset hole
Anyone have a drawing or know what the bolt circle and what is the location of the offset hole or are they all the same now its a 11mm 68 tooth...
......sorry pill nozzle setup for 25 lbs to 30 lbs boost with a good aftermarket iron block should run very low 5's hi 4.90's
7 gal pump run 8 .050's in the hat 070 main jet that should get you close maybe wind it up to 8000 get you comp down to 10.5 to 1 run 30 * timing