On a 715hp motor I had on the dyno, swapping from my dyno headers(2-2 1/8 x 4) to a set of 1 7/8 x 3.5 Hooker fenderwells cost about 40hp peak to peak, and 54hp at 6500rpm.
With the 1 7/8 headers installed in the car(678hp), at 3450- 3500lbs race weight, it went a best of 9.68 @ 137 in good air.......1.28 60'.
I've been talking with a guy recently who is working through a new combo.
4+ mph difference between two different converters, both custom built for the application, with no other changes to the car.
In his combo that shows up as a 65hp difference.
Good info fast68....once you understand how Wallace seems to be softwared as it were, you find that an S/SS car that leaves at 6k+ just doesn't compute to the numbers spat out as shown below for that weight/hp combo, so>
3500/678hp>
60 Foot E.T. : 1.39
1/8 Mile E.T. : 6.32
1/8 Mile Trap Speed : 107.48
1/4 Mile E.T. : 10.02
1/4 Mile Trap Speed : 134
IF this is an S/SS car or a hard leaver I can understand the lower 60 and hence the ET drop to 9.68 but what about the 137mph, at the same 678hp, shortening distance and time doesn't allow you to build more speed....somewhat confusing? ..One of our legal stockers used to run 10.1's@128
or you get this>
3500/747hp>
60 Foot E.T. : 1.35
1/8 Mile E.T. : 6.15
1/8 Mile Trap Speed : 110.52
1/4 Mile E.T. : 9.75
1/4 Mile Trap Speed : 137
