Sound Per4mance VI
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What would be the optimum size piping for low end power... around 4.5k and below
Exhaust Pipe Sizing and Backpressure
- Thread starter Sound Per4mance VI
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Sound Per4mance VI
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do you the size of the standard piping?
munday
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On a turbo car bigger = better. The quickest way to get power is to get the turbo spooling as early as possible, and you do that by having the greatest pressure differential between each side of the turbo, so minimum restrictions after the turbo.
Some people say a slightly smaller diameter gives better torque...its simply not true.
Obviously no point in having a 3.5" system on a 150bhp car though
Some people say a slightly smaller diameter gives better torque...its simply not true.
Obviously no point in having a 3.5" system on a 150bhp car though
Captain Starlet
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On a turbo car bigger = better. The quickest way to get power is to get the turbo spooling as early as possible, and you do that by having the greatest pressure differential between each side of the turbo, so minimum restrictions after the turbo.
Some people say a slightly smaller diameter gives better torque...its simply not true.
Obviously no point in having a 3.5" system on a 150bhp car though
you say bigger is better how come 3.5" be no good?
munday
Member +
I dont mean 3.5" would loose you power, but it would cost more and be louder than a 2.5 or 3" system and would gain you no noticable power on a 150bhp car.
You get to a point of diminishing returns
Sound Per4mance VI
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I dont mean 3.5" would loose you power, but it would cost more and be louder than a 2.5 or 3" system and would gain you no noticable power on a 150bhp car.
You get to a point of diminishing returns
what size piping and turbo are you using?
Phil
Super Moderator
3" side exit or 3" HRF exhaust are about the most insane exhaust you'll find on a starlet.
for your average 200bhp starlet id imagine a 2.25/2.5 system wouldnt be too much of a restriction, and if you go for an insane 3"system would the slight increase in power be worth it over the increased decibels?
i dont think so.
Phil
for your average 200bhp starlet id imagine a 2.25/2.5 system wouldnt be too much of a restriction, and if you go for an insane 3"system would the slight increase in power be worth it over the increased decibels?
i dont think so.
Phil
munday
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I'm only running a gutted cat and a HKS Hi power at the moment, if i were to change i would probably keep the backbox and get a custom 2.5" system made up...I'll never have mine over about 250 probably so wont need anything bigger
Sound Per4mance VI
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what is the normal size ppl use for side exits?
350ep70gr
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Anything from 2".25 to 3" i guess. Depend the sound and the setup probably.
Chris