Is there a big gain from 2.5" y-pipe to 3" y-pipe on a cammed car ?
01-26-2002, 01:13 PM
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Is there a big gain from 2.5" y-pipe to 3" y-pipe on a cammed car ? Right now I have MAC headers on my car with the MAC 2.5" y-pipe. I am changing my exhaust setup to a 3.5" all the way back. My question was is there a performance gain with going to a 3" y-pipe into a Flowmaster collector (2)3" in/(1)3.5" out ? Thanks.
01-26-2002, 01:44 PM
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Re: Is there a big gain from 2.5" y-pipe to 3" y-pipe on a cammed car ? I had MAC headers on my MTI stage II set up with 3" collector flanges, 2.5" y-pipe with CarSound 2.5" in/out cats on it. I had a shop custom build a 3" y-pipe for it using 3" in/out CarSound cats and I got exactly 6rwhp(426rwhp to 432rwhp) and 6rwtq(392rwtq to 398rwtq). I was planning to step up to a 422ci motor soon after that, so that is why I had it built. It may be worth it, but you loose more precious ground clearance......
Todd
Todd
01-27-2002, 07:49 PM
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Re: Is there a big gain from 2.5" y-pipe to 3" y-pipe on a cammed car ? 6rwhp/6rwtq is not bad, I was hoping for something like 10-15rwhp. I guess I was being a bit too optimistic. Is your car lowered by any chance ? If so, how bad is the ground clearance say over speed bumps ?
Anyone else have info on power gains from changing to a bigger y-pipe ? Thanks.
Anyone else have info on power gains from changing to a bigger y-pipe ? Thanks.
01-28-2002, 03:33 PM
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Re: Is there a big gain from 2.5" y-pipe to 3" y-pipe on a cammed car ? My car was lowered, running GW coil overs up front, and I did have clearance problems. I would have still lost some clearance with just the 3" pipe, as it is much larger than that squashed stock piece, but if the car was at stock ride height I don't think it would be bad.
I have the before and after dyno sheets scanned. I don't have web space set up to host them, but I can e-mail it.
Todd
I have the before and after dyno sheets scanned. I don't have web space set up to host them, but I can e-mail it.
Todd
01-28-2002, 03:41 PM
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Re: Is there a big gain from 2.5" y-pipe to 3" y-pipe on a cammed car ? [quote]Originally posted by BLK 98WS6:
<strong>My car was lowered, running GW coil overs up front, and I did have clearance problems. I would have still lost some clearance with just the 3" pipe, as it is much larger than that squashed stock piece, but if the car was at stock ride height I don't think it would be bad.
I have the before and after dyno sheets scanned. I don't have web space set up to host them, but I can e-mail it.
Todd</strong><hr></blockquote>
I currently have not had clearance problems with the Eibach lowering springs and the MAC 2.5" y-pipe. But I may be pushing my luck with the 3" <img src="gr_stretch.gif" border="0">
I would love to see the dyno graphs, could you please email it to sgharibi@seebeyond.com ? Thanks.
<strong>My car was lowered, running GW coil overs up front, and I did have clearance problems. I would have still lost some clearance with just the 3" pipe, as it is much larger than that squashed stock piece, but if the car was at stock ride height I don't think it would be bad.
I have the before and after dyno sheets scanned. I don't have web space set up to host them, but I can e-mail it.
Todd</strong><hr></blockquote>
I currently have not had clearance problems with the Eibach lowering springs and the MAC 2.5" y-pipe. But I may be pushing my luck with the 3" <img src="gr_stretch.gif" border="0">
I would love to see the dyno graphs, could you please email it to sgharibi@seebeyond.com ? Thanks.
01-28-2002, 05:31 PM
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Re: Is there a big gain from 2.5" y-pipe to 3" y-pipe on a cammed car ? i have a 2.5 muffler bent y-pipe and dont have much banging issues. i dont think it is holding me back much at all. with a good set of headers and a cutout in teh back of the catback, you are good!
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01-29-2002, 12:36 AM
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Re: Is there a big gain from 2.5" y-pipe to 3" y-pipe on a cammed car ? I decided to go with the 3" Y as well. Just called Mark (the guy who's going to be fixing my Y) and ordered the parts.
