BobBonahoom
Well-Known Member
- Joined
- Mar 6, 2009
- Messages
- 532
We had been using Bouchie pipes on our 21 and 45 riggers. A few weeks ago we substituted CMB pipes with 707 stinger mufflers and saw what seemed like an improvement in acceleration and speed. Not a scientific test, we just put on the CMB pipes at the same length as the Bouchie's (center engine to center fat band or cone maximum) and ran them. There was however one other difference, that matching of the pipe to the header. I bought a plumber's swaging tool on Amazon and used it to expand the CMB pipes so the header would telescope. (Prior to that we were sharpening the ID of the header to reduce the obstruction to the reflected gas wave). With this tool you can get an exact match where the ID of the pipe and header match almost perfectly. Works real well if you know the length of the pipe you wa
nt to run.
nt to run.