Quote:
Originally Posted by j cAT
you need 15 inches of vacuum .. you have a big leak somewhere ..
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I guess one might consider it a massive vacuum leak, but I believe it is un-avoidable with this car/engine. It is caused by a combination of the substantial valve overlap from the long-duration/high-lift camshaft I am running, (Solid/mechanical flat-tappet, Lift .637", Duration 312*/322*, (270* @ .050" lift). 13:1 Compression ratio. And an open plenum/single-plane high-rise intake manifold with a Holley 850 CFM Double-Pumper carb. Engines like this just don't build much vacuum. It is definitely not a street-driven car.
That is why I am thinking maybe I need to switch to a manual (Non-Power-Assist) Master Cylinder...
