Originally Posted by wadedog
I have no idea what to do, i'm thinking new springs but i'm hearing this is it and the numbers are right.
I don't want to wipe my cam or make a killer reving engine but i want it right and the numbers seem low to me but im not an expert.
probably 20% difference from flywheel to rear wheels is more realistic than 40. Of course it's not really a percentage of loss. A stock 305 should have roughly the same amount of HP loss as a performance built 383 in the same car, which would make the percentage much different. Except the 305 wouldn't have the converter you have..
All that aside, and regardless of what the numbers are.......They don't seem to correspond to the cam grind, and overall combo. The horsepower should be climbing between 4800 and 5700 and should flatten off and hang on to 6300 or so.
It' like it's not breathing right for some reason or other. cam,springs, intake, exhaust, intake port window match....something
at 4500= 273.5
at 4600 =287.0
at 4700 = 293.0
at 4800 = 294.3
at 4900 = 292.3
at 5000 = 288.9
at 5600 = 269.3
the peak torque was 327.6 at 4600
at 5700 = 262.3
at 6200 = 223.5