true dual exhaust compared to y pipe
09-25-2009, 09:40 AM
#21
09-25-2009, 10:51 AM
#22
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I am not impressed with the awful rasp that my car puts out.
I had Kooks Lt's, Kooks, ORY and SLP LM1 - rasp was awful. Sounded like **** above 2000 rpm.
I Now have Kooks Lt's, ORY, and a Magnaflow CB - sounds better and the rasp is way less but still there. I am gonna try the flowmaster merge and see if it makes any difference.
I had Kooks Lt's, Kooks, ORY and SLP LM1 - rasp was awful. Sounded like **** above 2000 rpm.
I Now have Kooks Lt's, ORY, and a Magnaflow CB - sounds better and the rasp is way less but still there. I am gonna try the flowmaster merge and see if it makes any difference.
09-25-2009, 02:12 PM
#23
He reached his 500 rwhp goal with a cutout that was open. Not taking anything away from him or the y-pipe exhaust, but according to Pat, his car lost 9.5 rwhp with the cutout closed, so there obviously is restriction at that power level with a y-pipe, no matter how good the design is.
Guys I was pissed at some **** I was dealing with and having a bad night so sorry if i came across as a$$hat
But the truth is for us guys making 400-500 rwhp a nice merge and a good CB will cost you very little.
I saw on a dyno a Kooks headers/Y MS4 car making 440 pick up only 5rwhp with the cutout open. He was running a Hooker CB and that is why I decided to run a Hooker.
Big cube high HP cars hell yea it makes more difference.
For most of us there is not enough difference to tell.....
09-25-2009, 03:06 PM
#24
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I would think a nice TD setup with an x-pipe would show more power than an open cutout as well since it still flows better and promotes more of a scavenging effect.
09-27-2009, 04:50 PM
#27
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I got lt's,non cat y and lm1 w/ head/cam/intake/spray. and oh man its loud, but i cant say it sounds bad, it sounds like a race car 
But its unusable, so i am installing a lm2 muffler,
But i know i want TD, anyone here running them full length?
But its unusable, so i am installing a lm2 muffler,
But i know i want TD, anyone here running them full length?
09-27-2009, 05:17 PM
#28
I agree with the merge. With LT's, LM1 and a poor merge Y and I went from horrible rasp and I didnt even want to drive the car to adding the moroso mufflers which helped a lot but I got a smooth flowmaster type merge with slp cats and it sounds smooth now. I'm sure the cats helped a little but mostly the merge.
TDs may be the best but there is no reason a good Y setup shouldnt be done, especially if you want to lower the car.
TDs may be the best but there is no reason a good Y setup shouldnt be done, especially if you want to lower the car.
Last edited by mikedamageinc; 10-01-2009 at 10:25 AM.
09-28-2009, 09:13 AM
#31
i have the tsp TD's and no problems at all with scraping. actually i believe i gained a little space at the x-pipe. sound alone is worth the switch. i had way to much rasp with my ypipe setup.
09-28-2009, 10:41 AM
#33
So the bottom line is if you wanna get rid of the shitty raspy sound produced from aftermarket cat backs, you should get a properly done Y pipe with a smoother merger/collector.
10-04-2009, 08:25 AM
#38
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So with only a few light mods headers and a tune. Is ithurting me to have true dual with it dumping off about halfway down the car? Because if it is I really wouldnt mind getting a new setup. The camaro is lowered and i scrape on pretty much everything. I was told i could be losing a couple hp with no back pressure. No cats...any sight on my issues?
10-04-2009, 12:29 PM
#39
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So with only a few light mods headers and a tune. Is ithurting me to have true dual with it dumping off about halfway down the car? Because if it is I really wouldnt mind getting a new setup. The camaro is lowered and i scrape on pretty much everything. I was told i could be losing a couple hp with no back pressure. No cats...any sight on my issues?
10-04-2009, 01:50 PM
#40
I've heard the arguments and tried the duals, but switching back to a traditional Y-pipe and SLP D/D catback with a cutout gained me .3 and 3 MPH at the track. Same track, same weather conditions, different night. I'm not saying it was all exhaust, but that's a pretty big gain with all else being equal. For the record, my duals were 2.5" mandrel bent with an H-pipe. I much prefer the catback with a cutout setup.