Harold's F'ing me over - big time.
hey 66...
I've ran mainfolds on my 66 cuda - 71 340 manifolds ran 13.3 @102
I've ran spitfires, they run 12.80 @108 through the same exhaust
thats one hell of a pea under my mattress.
I used to just chirp the wheels when i stabbed it
then went to spitfires and then I could slide left and right through 1st gear - again same setup, same exhaust - swapped to the spitfire headers.
let me say this again,,,, with the facts I just provided....
Spitfires made MORE POWER on my 66 cuda then manifolds...
you can put your percentages, and testing babble all you want - I increased mph in the quarter, and thats power, I also went through tires faster, and can definately feel peas under my mattress...
can you "feel" 6 mph in the quarter? I could... and Joe helped me install them and sat in the seat as we blasted down my street for the first time with them...
you cant argue your percentages VS a time slip!
PS - after a converter change it has gone 12.56 @ 108 with the spitfires... never got into the 12's with manifolds!