turbo370supra

looking at these two turbo they are close in price. 145lbs air flow vs 135 gt47 has a 93mm turbine vs the 96 of the s400. the gt88 has a 95mm turbine but flows less, uses a gt4788 compressor but the cover isnt as good flowing. i think that one is rated at 135lbs too. all three turbos should be good for 1100 wheel whats the better choice for a street strip car?

WS6HUMMER

iTrader: (19)

I'm looking at the GT4788 myself. I wanna go fast on the track but don't want a turbo with a huge exhaust wheel (like my friends GT55 on 347ci) & have to have a super loose converter.

Professor_speed

iTrader: (8)

s400-88=gt88>gt4788 thats my opinion. s400-88 and gt88 are really close, the gt4788 turbine seems to choke early once you get over 360ish cubes. depends on the combo really but for the same money I wouldn't get it. the compressor section is beast no doubt, I just like the other turbines better as the cubes get bigger.

turbo370supra

is the s400-hp88 the same as his old s88

JAX04

iTrader: (17)

Yes

turbo370supra

i think ill go the s400-hp88 route. but i was told they dont flow as well down low. i wish the gt4788 had a slightly bigger turbine and it would make my choice easyier. the gt5018 is the next step up from the gt4788 slightly bigger turbine and the compressor flows a tad more but the price is near 2k. maybe i just need to sack up and spend 2k

ittwgn

hi i,m looking at stepping up to an s400-88 on my iron 408 ci combo!!!! anyone have any links of suppliers that would have these!!!!in australia but willing to get one shipped!!!!cheers

Nitroused383

iTrader: (10)

I really think the GT 4788 is hard to beat, everyone says it has back pressure issues but it seems to rip for what it is. From what I understand even though the UHP 92mm is 4mm smaller than the s480 series 96mm wheel it is a more efficient design. It's the latest turbine wheel that flows great and outspools the rest. Also the GT4788 compressor housing moves a good amount of air where even the race cover on the S88 is the limiting factor. It does depend on how many cubes you are running though and the 4788 really shines on engine around 370 cubes or less.

Guys have been 5.05 @ 142 mph around 3250lbs with the 4788 with 350-360ish" sbf's. A great alternative is the new turbine side forced inductions is offering, the GT5088 or GT50's series with a 99mm turbine wheel. Pretty sweet unit if you're worried about maxing the 92mm wheel out.

LS1RedZ

iTrader: (19)

What does the GT4788 run price wise?

WS6HUMMER

iTrader: (19)

I have found one on YB for 1300 that was never used, still in the box. It was a journal bearing setup, not ball bearing but thats not a big concern of mine. The only funky thing about it is that it had a .96 AR, then again I have a friend that has a 1.08 housing he ran for 1 season that I could have for free.

I'm just not ready to start a new build yet myself. I really wanna squeeze a 9 out of this setup and will hopefully get there soon. Just waiting to get my friend through the big YB race next month then I will concentrate on squeezing more ET out of mine.

MUSTANGBRKR02

iTrader: (91)

I am looking to step up to a T6 setup and these are the same turbos that I am looking at for my 370" setup.

turbo370supra

whats the flow of the turbing side for a gt4788 and a s400-hp88