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raspy!!!

This is a discussion on raspy!!! within the External Engine forums, part of the LSx Technical Help Section category; After 2k RMP my exhaust gets really raspy, I just installed new headers and ory. Anyone know why this is, ...

  1. #1
    Senior Member Justin23454's Avatar
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    raspy!!!

    After 2k RMP my exhaust gets really raspy, I just installed new headers and ory. Anyone know why this is, also, alot of times when I start my car I get back fire, anyone know why? I know my exhauts isnt sealing great because I can feel some air coming out of the connecter points, so im getting some sealent for that today, dont know if that will help with the rasp or not, I hope so...

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    Senior Member Justin23454's Avatar
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    also, will new tips make it less raspy at all? I have stock tips?

  3. #3
    Life in the Fast lane sunsetorangess's Avatar
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    Met. Sunset Orange
    01 SS

    What catback do you have?, No changing the tips will not change the rasp. A good flowing catback will, ie magnaflow.
    You need to seal the system to get rid of those annoying exhaust leaks and the backfiring issue.
    I would reccomend using band clamps.
    J
    2001 SS, Its not the car its the Driver that matters....

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    Senior Member Justin23454's Avatar
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    well, they are blown cats from OBX.

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    Senior Member Justin23454's Avatar
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    If I get true duel exhaust (X pipe) would that fix it, or do I need new cats?

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    Senior Member Justin23454's Avatar
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    no one know? Or should I post in another section?

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    Junior Member BirdFlewLS1's Avatar
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    midnight Blue
    '99 Trans Am ws7

    I have LT headers,3 inch until the rear end and over it then to the tips. mine is very raspy also... i think the only way to fix this is a muffler. i am not going to put one on because of drag application but once i open my cut outs that are right off the headers....it goes away..so you could just get some cut outs lol

  8. #8
    O U 8 1 2 Spaz's Avatar
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    []D [] []V[] []D
    1999 trans am

    the backfire is normal.. unspent fuel combusts in the exhaust... all muscle cars shoudl back fire...

  9. #9
    Senior Member Justin23454's Avatar
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    so get another cut out :O i got one that dumps b4 the muffler, where should i put the other :O *I have a Y pipe not (X-H)

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    2000 Camaro SS
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    Cats are the best way to get rid of rasp on LS1 cars. Y-pipe and cat-back doesn't make much of a difference if you don't have cats. I had to run with 1 cat for a week after I put the headers in and it still had rasp from the side with no cat. Now with dual cats it sounds much better.

  11. #11
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    Black
    2000 Camaro SS

    Dual exhaust just may stop your raspy sound. I have true duals and I have no rasp..

  12. #12
    Senior Member Justin23454's Avatar
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    where is the best place to get the cats? and how will I know if they will fit my set-up

  13. #13
    Senior Member Justin23454's Avatar
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    also whats the diff with blown cats and none blown?

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    Member 2fast2blegal's Avatar
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    pewter
    2002 Trans Am

    Hey i have a set of SLP high flow cats and a true dual system for sale PM me if you want more info

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    2000 Camaro SS
    1969 Z28 JL8 crossram, #'

    Your so called "blown" cats are nothing more than an open chamber with nothing inside it. That probably magnifies the raspiness even more. I have some basic 3" carsound cats I bought used. Ask around and you can probably find a pair for $50 or less. Pypes makes a compact 3" cat and Magnaflow also has a compact 3" metallic spun cat(#59959) but the magnaflow may not quiet down the rasp as much as a longer cat.

  16. #16
    Senior Member Justin23454's Avatar
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    Last edited by Justin23454; 01-16-2008 at 08:58 PM.

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