mike13

iTrader: (27)

I presently have what I think is called a S483 (83 billet comp/ 92mm comp) T4 housing. Here's my problem this turbo is as physically large as I can fit. Also needs to stay a T4. Any suggestions?[IMG][/IMG]

6.0L
390CI
ETP 245 heads
4L80#

mike13

iTrader: (27)

As you can see it's a tight fit.

mike13

iTrader: (27)

stock48

iTrader: (17)

Billet S476/06/1.25 T4 and port the T4 turbine housing. Im currently running the S476/92 but will be testing a S476/96 here before long. Might get 1050-1100 HP with the billet 76 but thats a lot of power. You're going to need a GT5088 to go 1200 +in a T4.

hellbents10

iTrader: (10)

I think Jose is working on putting in a 96mm turbine in the t4 housings now. With his new compressor wheel I think 1200rwhp is attainable.

stock48

iTrader: (17)

It might be but housing will need a lot of work. I believe he is working on an aftermarket housing that should solve that issue.

WheelsUp84z

iTrader: (14)

Also look into a race cover if you can.

mike13

iTrader: (27)

I'm thinking the new billet 84etr and 96mm turbine would might be the ticket. I need to see if Jose can fit bigger wheels on my present turbo.

slowlsx

iTrader: (28)

I dont think you will see that much of a gain going to the 84m... they were already having BP issues wuth the billet 80 and 96mm turbine. My oower goals are the same as yours and I am looking at the GT5088

mike13

iTrader: (27)

Already have the race cover.

mike13

iTrader: (27)

Didn't know that, thought the 96mm turbine might have been the answer.

DrTurbo

iTrader: (3)

96 is the largest on a T4. We are working on a 100mm turbine, but only available for the T6 models.

smokeshow

iTrader: (17)

How much boost did it take to make 960?

mike13

iTrader: (27)

Can I get 1200rwhp out of the 84etr with 96mm turbine on a 390 engine?

mike13

iTrader: (27)

It has a set of ETP 245 heads and only needed 14-15lbs. My concern is if I try and push it that the back pressure could hurt the motor. 92mm turbine isn't a very big wheel for the size motor and flow of the heads.

smokeshow

iTrader: (17)

Have you measured back pressure? I've never seen a gas engine damaged from excess back pressure. They just stop making power. If you're really concerned you could use a larger diameter downpipe if you can fit it...that would reduce back pressure.

mike13

iTrader: (27)

No haven't measured and absolutely no room for anything larger than the 4" I'm already running.

I have no proof of the back pressure hurting motors but I've seen 2 motors lift and torch the heads when the small turbines where pushed hard. Not saying that was the cause but it looked possible.

smokeshow

iTrader: (17)

Hmm, interesting... Actual cylinder pressure is far higher than back pressure, so I wouldn't expect back pressure to have anything to do with lifting a head. However small turbines tend to spool faster so its possible that boost coming in too soon in a spot where the tune hasn't been dialed in well can detonate and push the heads up.

DrTurbo

iTrader: (3)

I think we can get you DANG close. We are building a max effort T4 76mm now for a certain customer on this board now. Should see what it does very soon. I'm thinking 7's will be possible with our T4....if not RIGHT at it.

Blackpanther99

iTrader: (8)

Thats impressive Jose. How many cubes does the block of the customer have?