[Cobra Chuck]

Originally posted by mkcobra
Sorry guys down here in TX rain rain rain. i didnt get to work on it at all yet , i will hope later in the week we will get it back on the dyno. so far to things seem close one the dist curve is stock and we can change springs and bushing . second the exhuast maybe the limiting factor if it really only has 2 small tube . 400hp needs at least 2 1/2 inch pipes duals for near optimum performace based on multiple exhaust companies.

Cobra chuck lets dont go there on the flattend cam, it only has 1400 miles on it hate to think my cam is toast but would love to bump it over .520 if i need a new one.

Good news about the distributor. It sounds like your research is paying off with the exhaust news. I am not familiar with CR exhaust size but it sounds like for whatever reason they have the exhaust pinched down pretty small. My LS427 headers and side pipes are 1 3/4" pipe each cylinder to the collector, from collector to muffler is 3 or 3 1/4" into a muffler that is 4" or better and back to 3 or 3 1/4" exhaust tail pipe that is 4" long. The DS / PS headers and side pipes are not tied to together. It will be interesting to see how much back pressure I am generating with this set up. Please describe your exhaust system a little bit better.

Cobra Chuck