vacuum help please

USCFOOTBALL

Registered User
I just put cyl heads on my 89 S/C I started the engine and found that the vacuum pod on superchager is wide open with full maniflod pressure at pod.
I know that's not correct can some one please help with vacuum maps for this engine or some advise on what operates the pod at W/G



THANKS FORD FOREVER
 
im pretty sure that's correct actually... vacuum holds it open which bypasses the supercharger, then when you get on the gas, you lose manifold vacuum, the valve shuts and forced the air from the supercharger into the engine, propelling you in to boost land. :) it it were backwards you would have either 0 vacuum at idle or a lil bit of boost at idle.
 
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