exhaust rasp after header install???
11-02-2009, 05:44 PM
#1
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exhaust rasp after header install??? ok since headers installed and cats removed when i get into it bout half throttle it sounds like a warsher rattling in my rear half of the exhaust... not at normal driving but only when into it for a quicker merge into traffic... and it dies as soon as the car shifts,... i would say at about 3200rpms.......
now i know i shook out all the y-pipe and nothing could have gotten into the intermediate pipe... so is this the rasp i have heard about? it sounds like a metal rattle... but i have been all over the car cant find it touching no where.... only other thing i thought of was the extra mount for y-pipe that holds it to the drive floorboard... but this seems solid and it sounds like its in the back of the car..... the car has the SLP dual/dual with Lpp headers and ORY pipe..
and it kinda sounds like old glasspacks that rotted out... but its sounds more metal rattle
thanks guys
now i know i shook out all the y-pipe and nothing could have gotten into the intermediate pipe... so is this the rasp i have heard about? it sounds like a metal rattle... but i have been all over the car cant find it touching no where.... only other thing i thought of was the extra mount for y-pipe that holds it to the drive floorboard... but this seems solid and it sounds like its in the back of the car..... the car has the SLP dual/dual with Lpp headers and ORY pipe..
and it kinda sounds like old glasspacks that rotted out... but its sounds more metal rattle
thanks guys
11-02-2009, 06:20 PM
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Well I wouldn't say rasp sounds like something rattling around in your exhaust but I guess it's possible. I was in marching band for years so I think of rasp as someone overblowing their trumpet or trombone. It's a very metallic, edgy, splatty sound.
Here is a clip of a car with a lot of rasp! Listen in the first 4 seconds
http://www.youtube.com/watch?v=F5kPmJB-T3A
Here is a clip of a car with a lot of rasp! Listen in the first 4 seconds
http://www.youtube.com/watch?v=F5kPmJB-T3A
11-02-2009, 08:10 PM
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can i get like a bullet muffler and cut it out?... i dont want cats.... but i may get some later.... i cant think of anything that would cause this sound it has to be the exhaust...
that vid is almost how mine sounds so i guess it is rasp...
that vid is almost how mine sounds so i guess it is rasp...
11-02-2009, 09:19 PM
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The ceramic brick style cats cut out the rasp a lot more than the newer style higher flowing metallic core cats. I have rasp with my true duals & metallic cats. The rasp is difficult to remove without a big muffler or a bullet with cats. Borla XR1 bullets quiet down the exhaust more than dynomax bullets. I'm not sure where magnaflow fits in with that.
A new set-up out there that seems to be doing a good job at killing rasp is the new SLP powerflo exhaust, which is basically 3 bullets.
http://www.byunspeed.com/product_inf...ducts_id=10614
I've heard of a piece breaking before in the slp dual/dual catback muffler. You may want to look into it.
A new set-up out there that seems to be doing a good job at killing rasp is the new SLP powerflo exhaust, which is basically 3 bullets.
http://www.byunspeed.com/product_inf...ducts_id=10614
I've heard of a piece breaking before in the slp dual/dual catback muffler. You may want to look into it.
11-02-2009, 09:29 PM
#6
Two 14 inch Magnaflows got rid of my rasp.
ARH headers with ARH catted y-pipe to Magnaflow catback.
http://www.flickr.com/photos/1835930...7602956888623/
http://www.flickr.com/photos/1835930...7602956888623/
ARH headers with ARH catted y-pipe to Magnaflow catback.
http://www.flickr.com/photos/1835930...7602956888623/
http://www.flickr.com/photos/1835930...7602956888623/
11-03-2009, 03:26 AM
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You can get a powerstick 20" http://www.classicchambered.com/ put that in the I-pipe and that should help out alot. I have Kook's LT, Catted Y and GMMG CB. An I just got my car back from my tuner and the rasp is gone completely. But since you don't have any cats it still should take out the rasp or a majority of it and then get a Flowmaster merge and that should kill it period.
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11-03-2009, 06:10 AM
#8
No cats, I put 2 12" resonators (glass packs) from classic chamber right before the tips. They completely removed my rasp. I have a GMMG and LT with ORY. I also have a dynomax bullet after the Y before the GMMG. It sounds just like it did before the headers but with ZERO Drone.
11-03-2009, 11:21 AM
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No cats, I put 2 12" resonators (glass packs) from classic chamber right before the tips. They completely removed my rasp. I have a GMMG and LT with ORY. I also have a dynomax bullet after the Y before the GMMG. It sounds just like it did before the headers but with ZERO Drone.
11-03-2009, 02:31 PM
#10
Yea, I suppose it is heavier, but if I'm worried about weight I better look down. My fat *** could stand to lose 40 lbs. I have pictures at home I will post, and I will post another you tube. I have it without the resonators posted now. You can here the rasp when I rev it but the rasp is much louder under load. Like I said it is completely gone now.
11-03-2009, 03:54 PM
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Yea, I suppose it is heavier, but if I'm worried about weight I better look down. My fat *** could stand to lose 40 lbs. I have pictures at home I will post, and I will post another you tube. I have it without the resonators posted now. You can here the rasp when I rev it but the rasp is much louder under load. Like I said it is completely gone now.
11-03-2009, 06:54 PM
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thanks fellas i will be lookin into something soon.... its killer.... do you think the tune will help it any? either way.... i will also look into the broken muffler as stated by jimmypop13... cause to me its sounds metallic rattle....
11-03-2009, 08:03 PM
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Just curious - why are you against cats?
11-03-2009, 09:58 PM
#17
Video and photo's GMMG+ LT, ORY and Bullet, 2) 12" Resonators This is my set up, When I just had the bullet after the Y it had a rasp.
http://www.youtube.com/watch?v=adWIYIbTSYA
http://www.youtube.com/watch?v=adWIYIbTSYA
Last edited by BRD-PREY; 11-03-2009 at 10:08 PM. Reason: spelling
