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Exhaust Backfire?

This is a discussion on Exhaust Backfire? within the General Help forums, part of the LSx Technical Help Section category; I recently had my LS1 Rebuilt and had the heads port and poslished and also got a new cam and ...

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    2000 Trans Am Ws6

    Exhaust Backfire?

    I recently had my LS1 Rebuilt and had the heads port and poslished and also got a new cam and had the valvetrain rebuilt, the engine runs soild to say the least. I also got a SLP airlid and K&N airfilter but i left the exhuast completly stock :-/ The exhaust seems to pop or backfire when i let off the gas after mild to hard accelleration.. Is this bad for the engine and does anyone have any suggestions on fixxing the problem?

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    JEB
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    That backfire is not a problem that needs to be fixed. It will not hurt a thing. It is actually a normal thing. Talk to your engine rebuilder. I am sure that he can explain it all to you.

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    Missing 4 Cylinders BULLET_WS6's Avatar
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    2003 GTI 1.8T :(

    shouldnt be horrible... but can i ask why you did all that work and still have stock exhaust?

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    That is a good question and the answer is that I had the engine rebuilt becuase i was very stupid and irresponsable and let the LS1 run to low on oil so i had to have the engine rebuilt. I am only 18 and i do not have the money right now to add an exhaust and i do not want to make it abnoxsiously loud (can not afford another ticket). I think that i would probably see a nice boost in power if i did free up the exhuast becuase thats probably the only thing that is a serious bottle neck in my set up.

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    Missing 4 Cylinders BULLET_WS6's Avatar
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    2003 GTI 1.8T :(

    understandable

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