SILVERBIRD97

iTrader: (33)

In your professional opinions will a Garret 4294 t4 be big enough for a 370 cu in motor with stock 317s and a cam that will peak around 6800? Looking for around 700 rwhp The specs are as follows:
GT4294
journal bearing
T4 flange
compressor: inducer 70.3 mm
exducer 94 mm
turbine: 82mm
A/R turbine housing 1.28

SILVERBIRD97

iTrader: (33)

No one? I am not experienced enough to know what I'm looking at when it comes to a compressor map. I do know there are some 6.0 cars with a turbonetics 7575 in the 700s. Some one educate me LOL The Garrett website says 425-850hp and 2.0-7.0 liter applications.

Jon5212

iTrader: (2)

I would think with the A/R that large it may be a little laggy but you are a stalled auto so it shouldn't matter. Sounds pretty good.

Or I could be a smartass and just tell you to go with a 105 thumper.

SILVERBIRD97

iTrader: (33)

LOL true. If I had the money and my choice it would be a pt88. But I might have a hell of a deal on the gt 4294. I would think with that AR it should have enough lungs to turn at least 6500 huh?

jridenour31

A/r isn't going to allow it to spin that high if the turbine is too small. What's the trim or exducer on the turbine? Also, a 70mm compressor is REALLY small.

o2camaross

iTrader: (2)

Are you talking about the one Justin White is selling?

o2camaross

iTrader: (2)

IMO, the only lsx I would run that turbo on is a 4.8. It would be a monster on a 4.8 but it's too small for a 370 IMO

o2camaross

iTrader: (2)

Unless that 82mm turbine is the exducer and not the inducer then I would run it on a 5.3 too, but the compressor is too small for a 370

topgun542

iTrader: (6)

thats my plan
thats the same turbos thats gonna be strapped to my 4.8...

stock48

iTrader: (17)

Too small IMO. A 4202 might do it but pk will be way before 6800, more like 6000~6200.

nutte242

I run a gt4294r on my ls1 made 780whp with 14psi and 550 on 7 psi
it has a 1,0ar
Video on the low boost

stock48

iTrader: (17)

Sweet build!
What does car trap at what weight? Im around the same with a maxed out S475 and closing in on 160 mph at 3350 lbs.

nutte242

[QUOTE=stock48;17511440]Sweet build!
What does car trap at what weight? Im around the same with a maxed out S475 and closing in on 160 mph at 3350 lbs.[/QUOTE

I have only tested it on low boost and it did 130mph the car weights around 3200

vwdave

iTrader: (3)

While a tad bit on the small side, I personally see no reason why you cant meet your goals. I would switch to a T6 exhaust housing and a ~1.0 AR on the exhaust.

You can also have the compressor modified to fit a 74mm from a 4202.