I was wondering what was the best HP/TQ gains on an aftermarket exhaust that has F/I.... I plan on going Turbo in a year or two when I have enough saved up and would like to start with exhaust now since it is within budget..... I'm eyeballing Stillen's but it seems to add 20 lbs from what I've heard.... I guess what I am asking is what is the optimal performance gains (regardless of sound) in HP/TQ/Weight of an aftermarket exhaust.....I have a G35 Coupe btw

 

regardless of sound?

Injen

 

For a turbo setup you want an exhaust with the biggest piping, least restrictive muffler avail. The ideal exhaust for a turbo car is no exhaust at all. Least restriction as possible!

 

A suggestion might be;
-Race pipes
-JIC y-pipe
-JIC 3" cat-back single side / or Magnaflow Ti single

Or custom build something.
These recommendations are for MAXIMUM POWER only, not considering sound or style.

 

is a 2.5 inch dual better than a 3 inch single becuase i have borla on right now and dont see the point in getting a 3 inch single pipe.

 

The 3inch exhaust will always make more power and be better since your letting out so much even with a single pipe, i seen a big diff. between 2.5inch to 3inch in hp but that just me go with what u like on your car.

 

As you go through the decision making process, don't worry about sound at all. The turbo TOTALLY kills the sound, and mutes it significantly. With with straight pipes and evo2 exhuast, my car is quiter than the stock exhuast with RT cats....much quieter.

Personally, I'd wait for the Ti Greddy racing exhuast that is 3 inches all the way back, and only has only little silencer on it.

 

the only exhaust truly designed around FI

http://www.z1auto.com/prodmore.asp?m...st&prodid=1150

 

still needs a y-pipe. Anyone make a 3inch wide pipe?

 

Jic-Magic those make a 3 inch Y-pipe.

Is 2.5 then goes to 3 inch, this is my setup...

P.S

I do agree with gq, you should wiat for the greddy Ti-exhaust, that was my frist choice, but it wasn't availaible.

--Josh

 

I think greddy single 3inch, with that JIC Magic 3 inch Y-Pipe would be sweet! I've always prefered one fat 3inch pipe, instead of 2 smaller pipes.

 

I believe the greddy Ti, is cat back all the way 3 inch to the back it porbably has like an H pipe or Y pipe I want it bad still. Don't know if its available

 

The APS TD is "designed for FI" as well. It's just not available yet.

 

Taking into account simple geometry:
the area of a circle is "Pi * (D/2)squared".
A smaller total cross-section should in general add more restriction than a larger total cross-section.

a) for a 2.25" TD the minimum total cross section is ~7.9".
b) for a 3" Single pipe total cross section is ~7.1.

With resonators of similar construction a TD @ 2.25 should flow slightly "better" than a single 3".

The Borla TD is 2.25" diameter and should offer good TT performance. The APS TD is 2.5" diameter and should flow even better.

 

i believe veilside is pretty large anyone know?

 

Bump...i'm actually wondering the same thing.

If the turbo's are going to drown out the sound of the exhaust anyway, what setup would be best?

Especially since my plans are to go for such a high hp number, i'm going to need something that's going to flow good.

 

how about this... from the same company the z-1 posted a post or two ago... this is a TD with 2.5 inch on each vs. 2.25

Thats a much larger x-section compared to a single 3 inch

www.ultimate-racing.com/Products/350Z-US-DualCatbackExhaust.shtml

 

best exhaust for superchargers?

 

Does anyone know the piping size of Injen exhaust ?

 

Another good exhaust is the Fujitsubo Legalis R and Fujitsubo Y-Pipe