Removinng the Rasp?
04-21-2012, 12:22 PM
#1
On The Tree
Thread Starter
iTrader: (1)
Join Date: Mar 2007
Posts: 148
Likes: 0
Received 0 Likes
on
0 Posts
Removinng the Rasp? I'm going to be seeing an LS1 expert this week, but I'd still like to still see what anyone thinks about my predicament. I have a 2000 WS6 Trans am with Flowtech long tube headers, Off-road Y Pipe, and straight pipe (SLP Loudmouth w/o the resonator) the rest of the way back...no cats, resonators, mufflers...nothing. I like the volume and overall tone, but as is apparently common for these cars, the rasp that comes just before the shift is terrible. Does anyone have any suggestions as to how I can eliminate the rasp as much as possible without turning the overall volume way down?
04-21-2012, 12:29 PM
#2
On The Tree
Thread Starter
iTrader: (1)
Join Date: Mar 2007
Posts: 148
Likes: 0
Received 0 Likes
on
0 Posts
by the way...I heard once that adding a high-flow cat would reduce the rasp significantly....i was thinking about putting one of these on the straight pipe...thoughts?
http://www.ebay.com/itm/3-Magnaflow-...0e1861&vxp=mtr
http://www.ebay.com/itm/3-Magnaflow-...0e1861&vxp=mtr
04-21-2012, 12:55 PM
#3
The y-pipe is what causes the rasp. So your best bet is to either try the cat in the I pipe or run a muffler again. I had basically the same set up and hated the rasp. Now I took all that out and put true duals on. Sounds amazing. I have 2 high frlow cats an x-pipe and 2 dynomax bullet mufflers.
04-21-2012, 01:19 PM
#4
On The Tree
Thread Starter
iTrader: (1)
Join Date: Mar 2007
Posts: 148
Likes: 0
Received 0 Likes
on
0 Posts
The y-pipe is what causes the rasp. So your best bet is to either try the cat in the I pipe or run a muffler again. I had basically the same set up and hated the rasp. Now I took all that out and put true duals on. Sounds amazing. I have 2 high frlow cats an x-pipe and 2 dynomax bullet mufflers.
04-21-2012, 01:25 PM
#5
On The Tree
Join Date: Jan 2012
Location: Boston
Posts: 182
Likes: 0
Received 0 Likes
on
0 Posts
I have BBK LTs and the 3" off road Y pipe mated to a SLP LM1 with the bullet muffler still attached. Its raspy as a bastard......
strangely enough I remember test driving the car, after the install, with the LTs bolted to the ORY and it wasnt as raspy... Leads me to believe its something to do with the cat back set up, hmmm
strangely enough I remember test driving the car, after the install, with the LTs bolted to the ORY and it wasnt as raspy... Leads me to believe its something to do with the cat back set up, hmmm
04-21-2012, 01:34 PM
#6
I had a bullet muffler put in my I-pipe and like Mattyfresh89 said it didn't do ****. The flow through design doesnt do much. I would go with a single cat like you have there or maybe one on each side like a typical set up.
Check these guys out too: http://performance-curve.com/
Check these guys out too: http://performance-curve.com/
04-21-2012, 01:37 PM
#7
On The Tree
Thread Starter
iTrader: (1)
Join Date: Mar 2007
Posts: 148
Likes: 0
Received 0 Likes
on
0 Posts
I had a bullet muffler put in my I-pipe and like Mattyfresh89 said it didn't do ****. The flow through design doesnt do much. I would go with a single cat like you have there or maybe one on each side like a typical set up.
Check these guys out too: http://performance-curve.com/
Check these guys out too: http://performance-curve.com/
Trending Topics
04-21-2012, 01:41 PM
#8
On The Tree
Join Date: Jan 2012
Location: Boston
Posts: 182
Likes: 0
Received 0 Likes
on
0 Posts
Only example I have is my buddys gto, although its LS2, full exhaust with a high flow cat ==> SOUNDS AWESOME! (true dual though, x pipe to Corssa)
I've heard other gto's with a similar set up with "fake cats" or no cats and they dont sound as tight
04-21-2012, 01:45 PM
#10
On The Tree
Thread Starter
iTrader: (1)
Join Date: Mar 2007
Posts: 148
Likes: 0
Received 0 Likes
on
0 Posts
doubtful, it will obviously take some volume away.
Only example I have is my buddys gto, although its LS2, full exhaust with a high flow cat ==> SOUNDS AWESOME! (true dual though, x pipe to Corssa)
I've heard other gto's with a similar set up with "fake cats" or no cats and they dont sound as tight
Only example I have is my buddys gto, although its LS2, full exhaust with a high flow cat ==> SOUNDS AWESOME! (true dual though, x pipe to Corssa)
I've heard other gto's with a similar set up with "fake cats" or no cats and they dont sound as tight
im not a total noob when it comes to exhaust...just this whole rasp situation lol.
04-21-2012, 01:46 PM
#11
On The Tree
Thread Starter
iTrader: (1)
Join Date: Mar 2007
Posts: 148
Likes: 0
Received 0 Likes
on
0 Posts
alrighty...i know ill lose some sound...but as long as the rasp is reduced more than the the rest ill be ok lol. the link you gave me above...do you recommend them from personal experience or just because its cheap and appears to be good? ive used magnaflow cats before and was very pleased so im inclined to go with that one...unless you have info to the contrary.
im not a total noob when it comes to exhaust...just this whole rasp situation lol.
im not a total noob when it comes to exhaust...just this whole rasp situation lol.
04-21-2012, 02:05 PM
#13
On The Tree
Thread Starter
iTrader: (1)
Join Date: Mar 2007
Posts: 148
Likes: 0
Received 0 Likes
on
0 Posts
well...my brother has a camaro with the lm1 setup but he has the "muffler" and the cats and his sounds perfect. since the muffler isnt super impactful...im thinking the cat should make enough of a difference....besides, at this point...im not running an slp kit...its just 3 inch pipe everywhere except the tail pipes
04-21-2012, 02:17 PM
#16
No no experience with magnaflow lol sorry.
http://performance-curve.com/2goerli...214-1-1-1.aspx
mine are about 2 years old so not the stainless versions but same design.
http://performance-curve.com/2goerli...214-1-1-1.aspx
mine are about 2 years old so not the stainless versions but same design.
04-21-2012, 02:21 PM
#17
On The Tree
Thread Starter
iTrader: (1)
Join Date: Mar 2007
Posts: 148
Likes: 0
Received 0 Likes
on
0 Posts
No no experience with magnaflow lol sorry.
http://performance-curve.com/2goerli...214-1-1-1.aspx
mine are about 2 years old so not the stainless versions but same design.
http://performance-curve.com/2goerli...214-1-1-1.aspx
mine are about 2 years old so not the stainless versions but same design.
04-21-2012, 02:41 PM
#19
[IMG]<a href="http://s1050.photobucket.com/albums/s412/01transampower/?action=view&current=101_1115.jpg" target="_blank"><img src="http://i1050.photobucket.com/albums/s412/01transampower/101_1115.jpg" border="0" alt="Photobucket"></a>[/IMG]
Now with my Poly motor mounts and my Jet Hot headers my driver side header sits close to the floor pan so the cat had to be moved back further in the system but still serves its purpose. As you can see the passenger side is fine. Most of the time it sould fit right after the collector.
Now with my Poly motor mounts and my Jet Hot headers my driver side header sits close to the floor pan so the cat had to be moved back further in the system but still serves its purpose. As you can see the passenger side is fine. Most of the time it sould fit right after the collector.
[/IMG]