1970 318 duster exhaust question???

Bad Sport said

I run 2 1/2 from my headers all the way out the back, and I think it performs very well.

With that said, I originally had 2 1/2 going back to the muffs with turn downs in front of the diff. Since i ran it all the way out the back, the performance difference is very noticeable, for the better..

Click to expand...

See when my buddy and I talk about backpressure we know what we are talking about. But when the term backpressure was coined it was just an easy word to use. Now though everyone and their brother uses it and they have no idea what it actually means. So now when someone says backpressure they really are thinking backpressure. Now I'm sure everyone has had different experiences with different pipe size. I'm not about to try to argue about anything. I was just explaining the science behind velocity and volume and pipe diameter. There are different sufficient pipe sizes for different applications is all. I liked using two inch pipe because it's easy to fit and it creates good throttle response. Of course I'm still talking about a stock 318. Like I said before if I had 2.76 gears and and I was driving in town with a two barrel I would definitely be using 2 inch. Like I said I'm not trying to argue and I'm sure everyone has their own experience with different pipe sizes.