best guess on HP?
#1
best guess on HP?
I have a 78 403 which I am installing in my 77 Cutlass S which on paper says about 185 HP from the factory. It has since been rebuilt with a mild cam, roller rockers, roller timing chain, edlebrock rpm manifold Holley 650 with vacuum secondaries, dual exhaust with headers and 3 inch exhaust.
Don't have the money to put it on the dyno so was wondering if anyone had a good guess on the increase in HP with the above additions?
thanks
Don't have the money to put it on the dyno so was wondering if anyone had a good guess on the increase in HP with the above additions?
thanks
#3
403s did not use a shim gasket. I believe that the factory quit using them in 1973 but not certain about that.
In order to make a reasonable guess, we need piston and cam specs. Also, was any work done to the heads? And, you need a bigger carb, IMHO.
Thread
Thread Starter
Forum
Replies
Last Post