Having A 4Ich Exhaust On A R33 Stock Turbo Good Or Bad ?

[MAD R33]

hey guys need some info plz

having a full 4ich exhaust on a R33 stock turbo... good or bad ? car is making 230rwk

Thanks

[mad082]

doesn't make much difference to performance. you could go back to a 3" or 3.5" exhaust and notice no difference in power. may notice difference in noise though (depending on mufflers, etc).

[MAD R33]

thats what i was thinking...but a guy told me you need back pressure for a stock turbo ?

[(OO)SKYLINE(OO)]

What Marc said or...

Here's a quick guide to exhaust sizes to your power out put, thanks to R31Nismoid on SAU here.

300 kW's = 3" exhaust

350 kW's = 3.5" exhaust

400 kW's = 4" exhaust

Your car will be fine with a 3" exhaust.

[Hank Scorpio]

230rwkw on a stock R33 GTS-T?

Da fuq?

[MAD R33]

car is no where stock just the turbo is stock

[UWISSH!]

As in the above posts unless you are making 400kw+ or plan to then there is no need for a 4" exhaust

[boostn0199]

It wont harm it, just will be overkill. In regards to backpressire thats wrong forced induction bigger is better back pressure is only needed for na.

[mad082]

thats what i was thinking...but a guy told me you need back pressure for a stock turbo ?

people often try and use physics from NA cars on turbo cars, and it doesn't work.

and technically speaking, back pressure is a bad thing on any car. it is just an unwanted byproduct of having an exhaust the right size to maintain the scavenging effect on a NA car.

[R31Nismoid]

car is no where stock just the turbo is stock

And if the turbo is stock - there is no way you are making more than 200rwkw

turbo is the limiting factor, they don't make over that - end of story.

Apart from the noise a 4" gives, it won't hurt the car as such.

You don't need backpressure, it's a turbo. Whoever is giving such advice, make sure you don't take your car back there. If it's the same guy who's lying to you telling you that the car has 230rwkw, well that just backs the point even more

[rasored]

BIGGER the better !!!

Turbo works by feeding exhaust gasses to turbo wheel / turning cold side wheel ..... any back pressure would only slow the gasses or wheel down ! .... AND WE DON`T WANT THAT DO WE