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Standed Exhaust - R33 Gtst -pls Help

koduRB25det

By koduRB25det,
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koduRB25det Community Regular

koduRB25det

Posted
Posted

Guys,

Im thnking abt my r33 gtst standed exhaust mufler fit with 3 inch turbo back after market exhaust.

standed mufler got 2.5 diameter and wonna fit it to 3 inch pipe all the way from turbo. with this set up any prob...? PLEASE HELP

thnaks

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mad082 Grand Master

mad082

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Posted

it is possible to do rather easily. not the best for flow and sort of defeats the purpose of going 3", but anyway i will explain what to do.

simply take the car to an exhaust shop, tell them you want a 3" system and to keep the stock muffler. they will be able to do it for you. if they can't, hop back in your car and drive to another exhaust shop with people who actually have a brain.

there are 2 ways in which they could do it. 1 is to simply have the new system join the old muffler through a flange setup and bolt the 3" flange to the 2.5" flange (they will match up, just not the best for flow), or they can remove the 2.5" flange and flare it out to 3" and put a new flange on.

either way you will probably need a custom 3" system as there are very few aftermarket 3" systems that use the exact same piping route as the stock system and would match up with the stock muffler.

koduRB25det Community Regular

koduRB25det

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  • Author
Posted

Thanks for that. what do u think abt the back pressure of the car. how it going with peformance..?

thanks

it is possible to do rather easily. not the best for flow and sort of defeats the purpose of going 3", but anyway i will explain what to do.

simply take the car to an exhaust shop, tell them you want a 3" system and to keep the stock muffler. they will be able to do it for you. if they can't, hop back in your car and drive to another exhaust shop with people who actually have a brain.

there are 2 ways in which they could do it. 1 is to simply have the new system join the old muffler through a flange setup and bolt the 3" flange to the 2.5" flange (they will match up, just not the best for flow), or they can remove the 2.5" flange and flare it out to 3" and put a new flange on.

either way you will probably need a custom 3" system as there are very few aftermarket 3" systems that use the exact same piping route as the stock system and would match up with the stock muffler.

Tony de Wonderful Veteran

Tony de Wonderful

Posted
Posted
Thanks for that. what do u think abt the back pressure of the car. how it going with peformance..?

thanks

I think you would have more back pressure if you filled your muffler with cement and let it dry.

mad082 Grand Master

mad082

Posted
Posted

back pressure isn't good with performance. if you want peak power and are going to drive around constantly above 5000rpm then you want a nice big exhaust (but not too big) that flows well. however if you are going to just putter around town at low revs then there is no need to have a massive big exhaust as it won't flow any better, and can even negatively effect the flow at low revs. it might be good in the higher revs, but if you are going to be doing most of your driving at low then you want an exhaust tuned for that rev range, which is what most factory headers are.

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