Headers,ORY.....Stock catback??
#1
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Headers,ORY.....Stock catback??
Hey guys ive been looking through some old threads and getting some mixed info here. Being my car is 90% street/grudge car i want to attract as least amount of attention as possible. Will running longtubes, 3'' Ory and a 3' E-cutout be sufficient with a stock catback? The goal is to keep the car quiet as possible until race time, then open the cutout for racing. Will the stock catback be TOO restricting when not having the cutout open? thanks for your replies.
#2
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I have the same setup on my car for years because I never decided on which catback. It is pretty quiet but a little raspy and restrictive. I do open the cut-out at the track and its a 2 tenths difference, that's how restrictive the factory muffler is. But one thing I like is the stock tailpipe sleeper look.
#5
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I have the same setup on my car for years because I never decided on which catback. It is pretty quiet but a little raspy and restrictive. I do open the cut-out at the track and its a 2 tenths difference, that's how restrictive the factory muffler is. But one thing I like is the stock tailpipe sleeper look.
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#13
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It was a TSP catted Y pipe I picked up cheap off craigslist. It fits okay but I am also dealing with pipe that was already somewhat compressed together. I didn't expand the ends and put it together like the guy before me had. I think it could be a little higher if I wanted to play around with it. There is no way to hang the y pipe like I have seen other brands. Maybe this is an older pipe but there is a lot of weight hanging between the headers and muffler so I have to improvise.
Sorry, can't really advise yes or no because it is a used piece and I don't know the age.
Sorry, can't really advise yes or no because it is a used piece and I don't know the age.
#14
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IMO, once you've added H/C to the mix I'd upgrade the y-merger to at least a 3.5"exit up through the cut-out then reduce it back down to 3" to mate back up with the factory exhaust. This way you still have max flow(with cut-out open) regardless of how restrictive the rear section of your exhaust is.
#17
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IMO, once you've added H/C to the mix I'd upgrade the y-merger to at least a 3.5"exit up through the cut-out then reduce it back down to 3" to mate back up with the factory exhaust. This way you still have max flow(with cut-out open) regardless of how restrictive the rear section of your exhaust is.
To give you an idea: I have minimal mods so with my ported stock TB, LS6 intake, Kooks long tube, Y setup (removed the reduction to 2.75"), and stock GM Performance catback I saw about a 11hp/8tq gain with the 3" cutout open. In this case, an aftermarket catback will only see minimal gains IMO.
Last edited by ssgunny; 06-18-2013 at 07:41 AM.