EightBall

I plan on running a single turbo on a stock cube LS1 at 7-9 psi. What size wastegate would be appropriate for this setup? I really have no idea so any input would be appreciated!

If nothing else, you guys with turbo systems, please post up what wastegate you are running.

dynedta

iTrader: (4)

i will be using a turbonetics racegate but with 7-9psi you should be ok with something like turbonetics deltagate which is pretty inexpensive

EightBall

I've been warned against the deltagate so I wont be using it. Would the 38mm create too much backpressure? I'm running a T-70 @ 7-9 psi.

JZ 97 SS 1500

iTrader: (2)

eh??? I think I need to add this to the turbo FAQ. Remember turbo folks, the more boost you bleed down the LARGER the gate has to be, not smaller. If you were running a GT40 at 30psi on an LS1 you could darn near run it with zero wastegate...hehe. If you run that same GT40 at 3 psi, you will need a BIG gate to bleed all the excess exhaust gas. Gate mm is a function of bleed off volume.

Jose

dynedta

iTrader: (4)

*puts large foot in mouth and out **** lol

EightBall

Thanks Jose, that's what I thought too. I already corresponded with you about this a few days ago and you told me the 38mm would be fine for my needs. Do I still have your assurance on that? Remember, I am running a T-70 at 7-9 psi, shifting at 6000 on a stock cube LS1. I have a couple friends who don't know LS1's but are skeptical at the 38mm being big enough for me.

Not doubting your knowledge but it is tough being pulled in two directions on this.

JZ 97 SS 1500

iTrader: (2)

We are using a 38mm Tial on the 03-04 cobra kit which uses a 76GTS which is even larger then the 70. It holds boost at 8psi rock solid on the dyno everytime. The tial 38 mm is an excellent unit. Its the best bang for the buck when it comes to WG's, even though you can't run to much race fuel through it, thats the only real drawback.

Jose

OLD BULL

iTrader: (1)

I haven't finished my turbo kit yet, but I bought a T67 that will be running @ 7 to 9 psi. For the wastgate I choose (with help of a knowlegable friend) a 38mm Tail wastwegate. The Tial unit is nice looking quality piece.

Jammer

iTrader: (1)

Speed Inc can get you a nice 42mm unit. Call Tom. Between 3 and 4 bills.

EightBall

Jose, thanks, I think you sold me on the 38

SINISTER

iTrader: (16)

turbonetics racegate on my t-76 ste up

EightBall

Any problems with the racegate?

SINISTER

iTrader: (16)

havent herd anyone having any problems it was included in my kit from tti as a upgrade from what they use to sell

EightBall

IF you dont mind me asking, what was the standard size?