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Old 07-01-2012, 02:16 PM
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That blower pulley combo is a good starting point.
you want low modest safe boost. If its not enough you can up the program later with a pulley change.

recurve the distributor to limit the spark advance under boost to 28-30deg @WOT.

blower motors like a healthy amounto of idle spark advance (20-26deg at idle)
but must use limited WOT spark advance under boost on pump gas.
(28 to 32deg @WOT under boost)

vacuum advance ( if used ) goes to the intake manifold below the blower.
NOT TO THE CARB.
the holley carbs will need rejetting and the power valves will need to be boost referenced. simple Carb main body modification.

The stock GM cam in your base 350 vette motor (L-48 or LM-1 350) is not blower friendly and will really limit the performance with a blower.
You want to change that.

get some thing that is street blower friendly

224-234@.050 112 to 114LSA .450" to .490" lift
EG crane 113801 H-278-2 ( HMV278-2)
OR Isky 201271281-12
or summit cam #1105
or Howards 110951-12

or something similar.
Get some hi perf replacement valve springs too.

Last edited by F-BIRD'88; 07-01-2012 at 02:24 PM.
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