SLP Y-pipe banging?...
Thread Starter
Teching In
Joined: Jan 2005
Posts: 6
Likes: 0
From: Folsom PA, just outside philly
SLP Y-pipe banging?... i just recently installed SLP's y-pipe and now when i hammer the throttle from a stop i get a really bad banging noise from right under my seat. when i installed the pipe i removed the black sheet metal shroud that was covering the stock y-pipe. does this need to go back in or can anyone tell me what the hell happened. any help would be greatly appreciated
It's hitting the body support, you'll see right where that is after you crawl under the car. Might be able to beat a flat spot into the pipe or adjust it to be farther away. You wasted your money on SLP's y-pipe. 
Are you still running stock manifolds/cats?
Are you still running stock manifolds/cats?
I had to beat both the pipe and the crossbrace (convertible)
to get the under-seat banging to quit, plus it was a very
finicky hang; you have to put fat shims in between the Y
(and don't forget the I either) and -every- close piece of
body sheet metal etc. Like pieces of 1x2 wood cut short,
jack the pipe with a crowbar to get the gap (wherever the
shim -won't- fit, is where you need one) and let the pipe
hold it in tension. Then you put the floor jack to the lowest
point, lift until the body starts to rise, and tighten up the
Y and I clamps.
Then you go drive it and try to find the spot you missed.
Again.
to get the under-seat banging to quit, plus it was a very
finicky hang; you have to put fat shims in between the Y
(and don't forget the I either) and -every- close piece of
body sheet metal etc. Like pieces of 1x2 wood cut short,
jack the pipe with a crowbar to get the gap (wherever the
shim -won't- fit, is where you need one) and let the pipe
hold it in tension. Then you put the floor jack to the lowest
point, lift until the body starts to rise, and tighten up the
Y and I clamps.
Then you go drive it and try to find the spot you missed.
Again.
i just fixed mine today, thought it was the reducer running off the header that was really close to car, but turned out to be the body support were the y pipe merges. Took the four bolts out, walked downstairs, and beat the hell outta it with a hammer (in the proper spots of course), put it on, no more bangin (why couldn't i have figured that out a lot sooner). It was the lip of the metal piece that was interfering with the y.
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From: Vancouver,[KITSILANO].B.C. Canada *WestCoast*
Originally Posted by jimmyblue
I had to beat both the pipe and the crossbrace (convertible)
to get the under-seat banging to quit, plus it was a very
finicky hang; you have to put fat shims in between the Y
(and don't forget the I either) and -every- close piece of
body sheet metal etc. Like pieces of 1x2 wood cut short,
jack the pipe with a crowbar to get the gap (wherever the
shim -won't- fit, is where you need one) and let the pipe
hold it in tension. Then you put the floor jack to the lowest
point, lift until the body starts to rise, and tighten up the
Y and I clamps.
Then you go drive it and try to find the spot you missed.
Again.
to get the under-seat banging to quit, plus it was a very
finicky hang; you have to put fat shims in between the Y
(and don't forget the I either) and -every- close piece of
body sheet metal etc. Like pieces of 1x2 wood cut short,
jack the pipe with a crowbar to get the gap (wherever the
shim -won't- fit, is where you need one) and let the pipe
hold it in tension. Then you put the floor jack to the lowest
point, lift until the body starts to rise, and tighten up the
Y and I clamps.
Then you go drive it and try to find the spot you missed.
Again.
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Thread Starter
Teching In
Joined: Jan 2005
Posts: 6
Likes: 0
From: Folsom PA, just outside philly
thanks everyone. i got the y-pipe for free so i decided to install it but after all this is just may take it out because i still have the stock manifolds and cats so i dont think i gained much if anything by installing it
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Originally Posted by NHRAMAN
pieces of wood?? never thought of using that...would look kinda funny though or do you mean remove the wood after tightening..??
in position. If you don't I expect the new vibrations
will remind you if the charcoal aroma doesn't.
