Exhaust question
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Exhaust question
hey guys, i just got done putting my fd back together with a fresh motor swap.
I stumbled over a very intresting theory.
i am running the borg warner s366 with the .91 a/r housing. right after the turbo thers is about 2 inches of 4'' pipe and then cuts down to 3'' pipe all the way out to the muffler!
So How much am i being restriced? i am planning on running 22lbs of boost and i feel like thats going to be a huge holdback.
I stumbled over a very intresting theory.
i am running the borg warner s366 with the .91 a/r housing. right after the turbo thers is about 2 inches of 4'' pipe and then cuts down to 3'' pipe all the way out to the muffler!
So How much am i being restriced? i am planning on running 22lbs of boost and i feel like thats going to be a huge holdback.
#2
Rx7 Wagon
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hey guys, i just got done putting my fd back together with a fresh motor swap.
I stumbled over a very intresting theory.
i am running the borg warner s366 with the .91 a/r housing. right after the turbo thers is about 2 inches of 4'' pipe and then cuts down to 3'' pipe all the way out to the muffler!
So How much am i being restriced? i am planning on running 22lbs of boost and i feel like thats going to be a huge holdback.
I stumbled over a very intresting theory.
i am running the borg warner s366 with the .91 a/r housing. right after the turbo thers is about 2 inches of 4'' pipe and then cuts down to 3'' pipe all the way out to the muffler!
So How much am i being restriced? i am planning on running 22lbs of boost and i feel like thats going to be a huge holdback.
That said, a 3" exhaust is probably not all that bad. A gradual step down might actually help with exhaust velocity compared to a 4" setup.
#3
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its not really gradual though. there is about 2 inches long right off the v band and then it just bridge welded down to 3 inch. so its like a instant restriction hit.
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Turbine exducer is 3 inches, right? If you donīt want to redo whole exhaust setup, you would be better with 3 inch system right from the turbine. As it is now, its over expanding exhaust gases which isnīt good for flow and abrupt reduction back to 3 inch pipe only worsens it.
Only way how to determine if your exhaust system is sufficient for given flow ie power level, is to measure it - post turbine pressure. You just simply canīt say that x inch system is good for xxx HP and in no way you can say that upgrading from x size to y will make certain increase.
Mostly it depends on how picky your engine configuration is. Main factors are porting and turbine expansion ratio. And of course flow rate on its own.
Only way how to determine if your exhaust system is sufficient for given flow ie power level, is to measure it - post turbine pressure. You just simply canīt say that x inch system is good for xxx HP and in no way you can say that upgrading from x size to y will make certain increase.
Mostly it depends on how picky your engine configuration is. Main factors are porting and turbine expansion ratio. And of course flow rate on its own.
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