namz7791 Posted October 23, 2006 Share Posted October 23, 2006 I have a 77 280Z with a 355 Chevy and T5 set up. I am currently running Patriot sidepipes on the car. The engine has a mild cam (Comp 270H grind) so it has a noticeable idle. The car is in the garage to get the body work done this winter. I had to move it the other day with out the side pipes hooked up and MAN! what a different sounding engine ( and no, not just louder!). The lopey idle became very noticeable with just the headers and about a 1' section of tubing. When the side pipes are on the cam is no where near as distinct. Finally my question: If I replace the approximately 3' long straight thru muffler in the side pipes with a shorter one, keeping the diameter the same (3") will this help the sound of the idle to be more noticeable? or is it strictly related to the length of the pipe and changing the muffler length will not have any affect? Thanks to all who reply. Quote Link to comment Share on other sites More sharing options...
COZY Z COLE Posted October 23, 2006 Share Posted October 23, 2006 My friend you have found out what Patriot side pipes don't advertise. The inner diameter on those pipes is 1 5/8 in. When you had them off that restriction was gone and your engine responded. I had one side seperate once on a dyno run and gained 25 hp when it happened. Reducing the length will gain you nothing IMO. Read this link....http://forums.hybridz.org/showthread.php?t=110202 LARRY Quote Link to comment Share on other sites More sharing options...
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