Why stock valve springs? Comp recommends to upgrade them over stock, I'm running 5w30 Schaeffer oil right now, and I have a typhoon intake I'm gonna get ported to take the place of the cheapo dorman intake.Swap back to stock valve springs, run 5w-20 oil, get a ford pi intake manifold.
You’re using NPI cams? If so, that might be the culprit vs the manifold. I’m thinking you’d need a “better” cams to take advantage of the “better” heads.Those are the non pi cams which is what I have they are only .500 lift, I was going to run a complete npi engine and heads which is why I have these cams, then came across a pi long block with a spun rod bearing for $100 and ended up using the heads.
back in the early 2000's I had some friends with imports and they got tuned by a guy with a dynapack hub dyno. The guy that owned the shop said it read a little higher than a dynojet, and another thing is you don't have those big old chrome 315/35-17's on your car so in theory it reads even higher...You’re using NPI cams? If so, that might be the culprit vs the manifold. I’m thinking you’d need a “better” cams to take advantage of the “better” heads.
Edit I reread the first post and saw that you have a set of Comps. Belay my last.
For the peanut gallery: Do “hub dynos” read differently than the drum style? Like how a Mustang dyno is said to read lower than a Dynojet?