I have this setup on my car but need new exhaust. I was wondering what size piping is necessary. I purchased the car used and it has a crappy custom 3" exhaust system with horrible welds and bends. Can I put an aftermarket 2.5" system and be okay with that?

What are the power restrictions for a 2.5" exhaust?

 

I'm in the same boat, but I have been being told and I am going with 3'' exhaust. I'm not really sure of the restrictions, but I do know if your going to be changing the exhaust and you are TT go 3''. I'm going with motordyne turbo tdx or the greddy turbo tic. For me I'm looking for the deep growl. Look at this way you are forcing more air into the motor and with all that forced air it need to escape the most easiest way. So with the 2.5" and all the air your forcing in, the smaller the diameter the harder it is to escape. I don't know a hole lot I'm in the learning process with the whole turbo thing. I do know the basics. There are a lot of guys on here that know there s**t. hopefully thay can give you a better look at it.

 

you should be able to find some info searching but i think the general consensus is that a good 2.5" exhaust doesn't get restrictive untill ~500rwhp, above that i would go with 3".

 

2.5" is fine for the limits of the 700 kit

 

the 700bb kit produced 545whp at 16 psi. Do you think the 2.5 is sufficient for supporting that?

 

I make 600whp with a stillen 2.5" exhaust.

 

There are several 600whp cars with 2.5" exhausts on here. Unless you are going for broke with a build, cams, etc and you want as much power possible, then you dont need the 3"

Not to mention they are loud as fawk. Im tolerant as hell to the neuisances of highly mod'd cars, but even I get upset sometimes when cruising in my car. I cant hear the motherfawking radio....

 

Well this car does have a built block with cams, springs, retainers, etc. It was originally Derek from Dsport's car. But at the same time I would like it to be somewhat civil since I drive an hour to work each way. Thanks for the input man. You're one of the few on this board that I actually value their input.

Side question, do you know how much power a stock VLSD is good to handle?

 

the SP car making 1248whp ran thru the stock pumpkin.

The only 3" exhaust worth considering for a daily driver would be that Motordyne. everything else drones like hell

 

What's weird is Hal's personal Z did better in the 1/4mile drag with only ~775whp than their 1248whp Z!!!

 

FI/APS 3" here, no drone!

 

I have the APS TD 3", if you dont think it drones you dont know the definition of drone!

Its a lose/lose

Windows down, the wind noise at highway speeds makes your left ear go numb and deaf. Windows up and the SLIGHTEST throttle to maintain speed and its like brain torture the drone is nuts.

I literally need to upgrade my speakers so I can hear music again, years of exhausts and a $hitty OEM system have left me with 2 blown rears and 1 dying front lol

OEM pumpkin is good to go for a ton of power.

 

off topic- OP you're back in a Z? post pics please

 

Hal trapped 13mph slower. Hal's a better driver

 

truth.

 

I purchased a G35 off of someone on the forum. I miss the Z a lot though. The Z has a better style hands down.

 

greddy TT exhaust 2.75 which what i have and its perfect

 

I had that setup on my Z but sold it. If I only knew I was getting back into a Z or G.

 

U must have bad hearing then. Went on a hour trip in a TT Z with freddy evo tt and it was God awful drone

 

Yeah it was ridiculous drone on my Z but I had a SC setup. I figured TT would quiet it down. Guess not?