I see that the turbo guys are running 3 inch exhaust while the SC'd folks are typically running 2.5 inch

Is there a reason to run 3 inch on a turbo car?

Is it better to run 3 inch on a SC'd car?

Or is it all dependant on how much boost your running?

 

Since a turbocharger is using the energy of the expanding exhaust gases, it behooves the turbo guys to have as little backpressure as possible. Backpressure is not quite as detrimental for the SC guys, up to a point.

 

ok, that makes sense. So would using a 2.5 inch exhaust on a turbo set up be bad?

and on the stock pulley 2.5 is ok?

so I guess what youre saying is depends on the application and what amount of psi you want

 

3.0 exhaust is recommanded for SC'ed with small pulley, high psi i.e. < 2.87.

 

You getting boost? If so dont get scared. Get the 3.33 or smaller.

Oh, and I have Greddy SP and warpspeed test pipe. 2.5 all the way! The muffler shop said they didnt want to mess with it, so I guess I will do it tomorrow......

 

Less back pressure will help a turbo spool faster. Thats the only difference. Once they start boosting the same exhaust flow capicity will be needed. For a turbo or sc car running under 8-10psi 2.5 will be fine, over that 3" will flow better and you will gain power and torque.

 

thanks matt

That is what I wanted to hear

 

**deleted post**
too late... cant let the cat out of the bag.

 

Hm...interesting. Are you getting what I think you're getting Bags?

 

u guys referring to the exhuast piping...or the exhaust itself in size?

 

Both..

 

well i got 2.25 piping and 3 inch exhaust


so...where do i fall?

 

2.25

 

Like they said both. From the CAT back on my car is 2.5 inch pipe. my inlet on my muffler is 2.5 inch.

my exhaust on my muffler is TWO 2 inch pipes... 5th gen muffler

Hope that helps

And shogun is correct

 

cant stop staring @ my V2...juss laying here..

waiting to go on !

 

Haha!!.. I know exactly how you feel..

 

 

Everybody that has bought the s/c and not installed it. Put it in your passenger seat and it will knock 1.5 sec of your 1/4!!!Im fu*kn with all of you. Put your shizzit on , youll love it

 

anyone got some spare ducktape



so i can start holding my tranny !!

 

 

Damn what timing.. You had to wait till my car was done @ Jeff's before you could get the SC install'd.. Now Will has to wait till I get my car out too

 

I had my car inspected a couple of weeks ago. I have boost, EGT and fuel pressure gauges in but not the blower yet. I was waiting in the lobby and I could hear the dumbass technician revving my engine up - trying to get it to show boost on the boost gauge, I presume. Later, he had a smirk on his face when he handed me back my keys. I guess he thought I was some kind of poser. It was then that I wished that I had thought of leaving the blower on the passenger seat to indicate a work in progress.

 

i hate A$sholes like that ...

i really do ...

last time i got my car inspected...the jerk ran my **** juss to hear my intake...i yelled @ the owner...

Outcome - No Charge !