Quote:
Originally Posted by 77trailering
i have a 383 very choppy idle and it requires a 3'' exhaust, but i can't stand the loudness of the mufflers.....it has an H pipe and i am putting summit 3'' cut outs and i can't decide what or which mufflers will be the most quiet ones....at the same time making sure it has 3'' in and 3'' out....i will really appreciate all advice and input, thank you
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Not to ruin your thought process, but years ago, I built my first 383, and with some help from Flowmaster and their computers we figured out that a 383 is not going to move enough exhaust gases to need 3" piping. The idea sounds great, but the loss of exhaust efficiency was not worth the extra cash to make the sytem up. The exhaust gases need the piping to be right to allow the gases to create a vacuum effect as they loose their heat and energy. That is the idea of scavenging in a system. If you are running a single exhaust pipe, then yes the size would not matter, but with full length duals, the 2 1/2" piping is more than enough for a 383. If you plan to run the engine wide open, most of the time, then the 3" may work, but it is killing your performance otherwise.
I have run Flowmaster muffs and right now I am running Magnaflow muffs. I like the low rumble of the Magnaflows, but they bark as loud as the Flowmasters under a heavy pedal. I have been running my 383 around the country since 1996 and it has worked well for me. I also have the engined cammed up with a Comp Camstroller set up.