View Single Post
Old 14th April 2008, 06:41 PM   #35 (permalink)
Codeman
Senior Member
3,000rpm (Grandma Drag)
 
Join Date: Apr 2007
Posts: 273
Location: Invercargill
Re: Exhaust sizing? b18c turbo.

Quote:
Originally Posted by Cyclone21
Quote:
Originally Posted by Codeman
Have seen many many people go for 3" on stock b18c turbo's with the likes of a To4e and turbo's a bit bigger than my GT28,

I have been told that while going to 3" is good for outright power, A 2.5" can support up to 600hp (proven) and will be much better for spooling around the street. So why go for 3"?

Will it be more responsive on the 2.5" round the streets compered to the bigger? But Will a 3" make more power?
2.5" exhaust on rb30det maxed out at 340whp (told to come back with bigger exhaust), what car made 600hp with a 2.5" exhaust?

If you are aiming for 200wkw on a GT28 I would highly reccomend 3" (straight as possible) exhaust..

What ca18det makes a true 550atw figure in the country? LOL

You want as least possible restriction in the exhaust as possible for Forced Induction unless you have a lot of money to spend on extensive R&D
Couldn't tell you mate, I have only been told this, and then going to 3" went slower.. Don't quote me on this.
Everything i posted was more of a question, not a statement luke.

Sounds like i have been told the same as bumped-EG and got told..
Its not "NEEDED" for our setups, BUT.. if you want more power and less money in you pocket Ect Ect go to a 3"

ONE more question.

AS far as plumbing pipe back for the gate, further down is better? and would i go for a 2.5" for that?? maybe create more volocity pushing it back into the exhaust?
Codeman is offline   Reply With Quote