Speedmaster magnum inspection w/Justin
Did a cranking check on my truck today with above heads at 60.5cc and 61cc each after milling .020
170-175lbs cranking warmed w/throttle blades open.
Keep in mind..302k and stock cam still.
Plugs are telling me I need to run 89 instead of 87. Faintest few of specs on porcelain. Piston tops look good.
I'm happy.
Did a cranking check on my truck today with above heads at 60.5cc and 61cc each after milling .020
170-175lbs cranking warmed w/throttle blades open.
Keep in mind..302k and stock cam still.
Plugs are telling me I need to run 89 instead of 87. Faintest few of specs on porcelain. Piston tops look good.
I'm happy.
