85irocinjected

I have not been able to find the flow charts for this T70 but I assume they are pretty much all the same. Do you guys think this would be a good turbo for a single turbo app. on a stock bottom end LS1? I just don't want it to be a bottle neck. Then eventually add another one for a twin turbo setup after a new bottom end is put in.

T70 TURBO SPEC WITH T3 FLANGE:
60.5 - T COMPRESSOR WHEEL
64.5 SHAFT & WHEEL TRIM

AR 70 COMPRESSOR HOUSING
AR 84 TURBINE HOUSING

Will this be a bottle neck for my stock bottom end LS1 running about 4-5psi and spinning to around 6000k rpm?

85irocinjected

ttt...

Boostaholic

iTrader: (4)

this is a ssac/chinese turbo? its not really a t70 even though they call it one. for example my inducer on a masterpower t70 is 10mm bigger, and the exducer is bigger too but i forget by how much.

Thoes turbos should be good for about 500, but i would recomend spending your money on a higher quality piece. I've had good luck with my MasterPower T70s and they cost $550/ea w/ polished comp housings and a warranty (Which I used to have them serviced)

Turbo Tech

iTrader: (2)

Did I read you question right? A 70mm comp wheel with a .82 T3 exhaust housing? The exhaust back pressure would be hugh!! Do yourself a favor and find a different turbo, 70 mm T4 with a .96 ar on the exhaust will wouk better.

02BlueFirehawk

Yeah T3 is too small. Smallest I'd go is a T4 exhaust side, .96 A/R, A Precision T-76 would get you started.

85irocinjected

Thank you guys for the response. Im definetly going to get something bigger.

JAvenger007

iTrader: (9)

Boostaholic hit the nail on the head IMO.
The MP70 is a decent quality piece, good price, and makes decent numbers. I bought one for a 3.8L 4th gen build coming up later this summer and it looks pretty promising.

85irocinjected

I think I will buy a Turbonetics T76 from forcedinductions.com. I have heard alot of horror stories about MasterPower turbos failing. What is ya'lls opinion on MP vs. Turbonetics?

ALL UC2

iTrader: (4)

there is nothing wrong with mp turbos. there is a poll right now on turbomustangs.com about how long has your mp turbo survived, and i will take the chance for the price after seeing the results. i would go with a mp gt45 or a borg warner s400. both of them are much cheaper than a turbonetics t76.......... or you might look at some holeset turbos also, they have a really good rep and they are SUPER cheap. they come on alot of cummins engines. there are a few that are plenty big enough for you.

85irocinjected

Being that the holsets are so much larger would'nt it take more rpm to get is up to boost compared to a smaller turbo such as a MP or Turbonetics??

ALL UC2

iTrader: (4)

actually they make a bunch of different sizes, some that would be too small for your car.

JZ 97 SS 1500

iTrader: (2)

A stock S400 or your typical Holset unit is going to have overly sized turbines with huge A/R's (laggy) and compressor wheels that are more suited to high pressure ratios, but not high flow/low pressure ratios where most 230-400ci engines operate.

kidcamaro98

iTrader: (8)

yup i have the MPt70 on my 3.8..couldnt ask for a better turbo for the money.

I know about 6-7 guys that have MPt70's on their F-bodys...both 3.8 and LS1. Tiago is a perfect example...he has twin masterpower t70's on his trans am and hes making 1000rwhp on pump gas..impressive?? I believe so.

Evereyone i know has nothing but good things to say about them...including me. Never had a problem and they have been ran for 80K without having to be rebuilt.

JAvenger007

iTrader: (9)

you and tiago were actually the first two that came to mind. The MPt70 seems pretty popular among 3.8/3.4 guys these days

kidcamaro98

iTrader: (8)

yah it is...so is the Turbonetics T61 but thats a more expensive turbo that alot of us would like to dump the money into....

The MPt70 is more into the 3.8 crowd then the 3.4...i believe its still a little too big for the 3.4.

your gonna do a 3.8 turbo build you said??

52172

iTrader: (2)

Just get a TC-76 .96 for 1 grand can't go wrong.

JAvenger007

iTrader: (9)

Yea its a 97 RS. I got 30lb SVO inj but think I need to go bigger. How are your 36s working out?
Also which fuel pump did you go with and how much boost are you running? The guy wants round 300rwhp, safely. Very doable IMO.

Thats still twice the price. and why not .81?

kidcamaro98

iTrader: (8)

30lb injectors are too small for a goal of 300whp. He will need atleast 36lb injectors. Im on 10psi (37lb/min) and am maxing out my 36's at a 105% injector duty cycle...I need bigger injectors also. I have a MSD inline fuel pump and it works good enough to get the job done...

does he want to make this 300whp through a A4 or a 5spd??

85irocinjected

Well what about a set(twin) of t3/t4 hybrids:
COMPRESSOR: 45 trim wheel, 0.42 a/r housing, 2.5" inlet, 2" outlet
center section: oil cooled chra
TURBINE: 1.32a/r P trim wheel
T4 Flange

This is about what most people running twins use right? Most people running this type of setup have a .48 a/r compressor housing but .06 is not that great of a difference so I don't image that would matter much.
What do ya'll think of this? The motor is a stock block 346ci LS1 with a T56 trans.