Not Ranked
I run side pipes that are bolted to the collector with four bolts. On track day it's quick to simply unbolt and remove them and run open headers. I bolt on a short extension with a turn out to direct the "flames" away from the body.
The more horse power and flow you have the greater loss of horse power you will have from restrictive exhaust. In my case, 427 with 428 crank and solid roller cam that would turn up to 7,000 rpm, the side pipe loss was 97 horse power.
At the track I don't run air cleaners (2X4 intake) and also run bigger jets in the carb. With no air cleaners and open exhaust you need to increase the jet size to compensate for the additional air flow in and out. On the street, smaller jets, air cleaners, side pipes and I STILL can seldom go to wide open throttle due to traction issues. On the track, road race slicks are a must have for my setup.
|