Non Skyline Inquiry

[R33GOD]

my dad owns a 300zx twin turbo 4 seater. he's going to get a catback system but dosent know whether to run a twin 3inch or 2.5 inch cat back?

after some advice, pros/cons..

i dont think the car would push no more than 260rwk when its finished.

cheers guys

Edited July 24, 2007 by R33GOD

[R33GOD]

anyone?

[AZN25T]

anyone?

2.5 inch catback is too small for a turbo car IMO... that's the kinda size you'd put on your honda. Go for 3" :sorcerer:

[RBwhatever]

Twin 3" for turbo. Twin 2.5" max for non-turbo.

[RBFIRE]

twin 2.5" that is enough for 260kw.

that 5" total?

[mad082]

twin 2.5" doesn't have the same area as a 5".

5" has an area of 126cm2

a single 2.5" has an area of 31.7cm2, so 2 of them have an area of 63.4cm2. thats a slight difference.

if you are going to run twin exhausts you won't want to go twin 3". you are only pushing 1.5L per side. i'd say that twin 2.5 would do the job for 260kw.

he should get the cats and possibly dump pipes done while he is at it, because there is no way that he will get 260kw with the stock items.

[R33GOD]

twin 2.5" doesn't have the same area as a 5".

5" has an area of 126cm2

a single 2.5" has an area of 31.7cm2, so 2 of them have an area of 63.4cm2. thats a slight difference.

if you are going to run twin exhausts you won't want to go twin 3". you are only pushing 1.5L per side. i'd say that twin 2.5 would do the job for 260kw.

he should get the cats and possibly dump pipes done while he is at it, because there is no way that he will get 260kw with the stock items.

we'll be getting the rest of the exhaust at a later stage. dont want to limit ourselves now basically