suggested exhaust size for 4age turbo

[scope]

hi there

i currently have a 2" exhaust in my ke30, gonna convert it to a 4age turbo and wondering if 2" is too small? should i go up to 2 1/2" or what?

cheers

[AJz]

for a 4age turbo id prob say 2.5, depending on what your aiming for tho.

[EVLGTZ]

2.5 is fine size to go for.

[fx gt]

what size should i got for for my na 4age?

[Drifter4ag]

you could do 250hp on a 2inch exhaust ...
i would just leave it as is and see how you go

[Malcolm]

although you may be able to do 250hp on a 2" exhaust, the same engine would probably make another 5-15hp more with a 2.5". A 2.5" pipe has more than 50% more cross sectional area than a 2" (and a 3" has 125% more c.s.a)

[Gadget]

what size should i got for for my na 4age?

Most exhaust people recommend a 2.25" system for the N/A 4AGE. It all depends on what you're going for (Outright power or retaining some torque).

[evil_si]

2.5" on a turbo 4age is sweet,

2" is what i prefer on a n/a, lots more responsive and not so damn noisy

[EVLGTZ]

yep and 2 and 1/4 inch is a lil more pricey from memory as its not as common a size

[peas]

What sort of mufflers are you guys with 4A-GZE/GTE's running? I bought my car (AE92 GTZ) with a 2 3/4' exhaust from the extractors and its way too loud. The engine has a 14lb pulley kit and currently has two straight through type mufflers and a conventional one at the back. Its just got a really harsh bark when its boosting or above about 3000 rpm.

[craigt]

Hey. Im running my GTZ with headers, mandrel bent 2 1/2, splitting into twin 2 1/4. Running 3 mufflers and a resonator. Sound bloody good, really deep with none of the rasp at 3000rpm.

[Malcolm]

problem with the 4agze is that it doesn't have a turbo to quieten it down and make it sound better, so it sounds like any other f*cking 4age!

[CozmoNz]

yeh, but you get to change the *vtec* change point .

at least the noise of vtec anyway....