T/ALT1

iTrader: (3)

Well I have been gathering parts: shortblock(L33), heads(ported dual valve springs), turbo (S475 T6 1.32 AR),intake,80# injectors, wastegate, oil feed and drain for turbo and now Im starting to build the hotside. I have truck manifolds with flanges to weld to, T6 flange for turbo to weld to and now I need to decide on pipe size. 2", 2-1/4" or 2-1/2", originally I was going with 2-1/2" but with the T6 turbo and large AR 1.32, I'm thinking 2-1/4" may make more pressure and allow quicker spooling? Just want you guys with experience to help me out so I can go buy some pipe and get to work. I know either one will work just looking to get some opinions since this is my first build from scratch. Also what size for the cold side? Im going to have all the pipes coated when done and Ill post pictures of the progress. Thanks

PUNISHER TA

iTrader: (13)

I couldn't find 2" 304SS tubing, so I went with 2-1/8" for my S475 build. The compressor outlet on the S400s is 4", Im not running an intercooler, so it was an easy decision for me to run 4" right to my 102mm TB.

Gonoma

iTrader: (15)

I went with 2 ¼ for my cross over but mine is similar to a kbracing hot side but made for an s10...I also have a small 78/75 1.15 turbonetics. I wouldn't go below 2 ¼ though for your setup though

Gonoma

iTrader: (15)

I had an s475 and it didn't have a 4" outlet...maybe a 3" outlet

MUSTANGBRKR02

iTrader: (91)

I went with 2" on my 370 and S480

PUNISHER TA

iTrader: (13)

Hmmm... Im still new to the turbo game. Ill learn one day.

LilJohn

Race cover is a 3 inch slip fit. Standard cover is a 3.5 vband.

BlackWS666

iTrader: (31)

2.25".........period

tireburner163

iTrader: (2)

I'm fabbing my hotside right now and I'm running 2 1/4" for my cross over.

S475 96mm T6, cam only LM7.


Also 2 1/4" is the prefect side fit in each side of a divided T6 flange. Just flatten two sides, tack it in, then dolly it back out. It's almost a perfect fit.

T/ALT1

iTrader: (3)

Thanks guys, looks like 2-1/4" may be the way to go.

MIGHTYMOUSE

iTrader: (59)

here's my opinion,

don't stress about it, any will work fine for you provided the turbo is at the front of the car.

T/ALT1

iTrader: (3)

It's definitely going to be up front, I'm even looking at maybe mounting it behind the fog light holes, where it would draw from there and the downpipe would go straight back.

Camaro9969

iTrader: (12)

Exactly!!!

TrickrTreat

iTrader: (3)

+1 ...

69-chvl

iTrader: (11)

I just measured the ID of one of the flanges on a LS3 Camaro exhaust manifold, and its 2.125! Might as well keep the pipes about there.

BLWN1

iTrader: (6)

Any pictures of the flange to 2.25? Just curious how your doing it? I'm debating have a blank flange done with 2 2.25 holes, is that possible I don't have all the parts in front I me or measurements?

67Firebird455

iTrader: (27)

I got stainless 2.25" V-Bands, welding to truck manifolds I hacked up to fit my 67. I'm also running a T6 S475.