CliffRS4

iTrader: (1)

Running a T34 with mar m shaft as I run (quite aggressive) antilag and want to keep it.

Contemplating upgrading my turbo to one of the above as even my tuner says that the turbo is too small

Would I be better off getting hold of a T4 with a mar m shaft or getting a GT30.

I think remember Mike Rainbird saying on a previous thread that the T4 flowed more air etc than the GT30 hence him sticking with the T4 on his car.

Please discuss as this interests me to see what the pro's and cons are.

This is on a zetec not a cossie lump.

Many thanks,
Dave

gus

iTrader: (1)

you know who you should be asking this question dont you

CliffRS4

iTrader: (1)

Yes but he's away and I want to know what everyone else thinks

JTECH James

iTrader: (13)

The GT series doesnt like ALS does it

Andy_R

iTrader: (3)

T4 will work a treat

I know of a couple of larger capacity RST's that have had them fitted, with good results.

gus

iTrader: (1)

his away again


where he gone now and when is he back? was gonna pop down in the morning

Miller 3

iTrader: (4)

Think thats whats holding me back

Staffi

iTrader: (1)

I've heard alot said about the GT series turbos being brittle but i think it's myth alot of it, ok 1 or 2 have failed and when they do it's in the bin time, but T4`s fail too.

The Jap lads run alot of GTseries turbos and i don't hear them having much trouble.

Your choice i guess and only you can decide..

I'm having a GT30 later this year so hopefully it'll be fine..KISS OF DEATH..

JTECH James

iTrader: (13)

thing is most of the jap cars run lower boost then us, hence why they dont fail over there as much as here. thats the same reason this influx of cheap shit turbos is on ebay, the jap guys can get away with them, but they dont like 40psi

CliffRS4

iTrader: (1)

He's in Portugal till Tuesday Gus

The problem is that I do use my antilag which would sway me over to the T4 as I would get one with a mar m shaft as opposed to have my antilag reduced considerably

Stavros

seen any proof of that? or is it just more tales from the rainbird?

i know of tons of cars running ALS and no DV on GT series turbos.

Staffi

iTrader: (1)

40psi.. 2.7 bar....

I know Kev Atkins runs over 2 bar on his, don't think he's had many issues, Mark is the man to tell us really..

Mark Shead

Every GT30 or GT35 or GT40 I run runs 2.5bar and I dont see any point of running less .

Mark

Staffi

iTrader: (1)

Miller 3

iTrader: (4)

What about the als?

Miller 3

iTrader: (4)

No i havent Steve' So sway me over to the DARK side

Mark Shead

I have used mild ALS but not realy agressive stuff as I dont see the point as it has less lag and better spool than a T4.

Mark

Miller 3

iTrader: (4)

I would need a GT35 for 500 horses Right....

Big Will_

I believe the GT series turbos are more succeptable to bearing failure through prolonged use of ALS/Launch Control than a 360 bearing based equivalent. I know this is the case on smaller framed GT series for definite.

(Having smashed a GT28RS to bits with ALS)

Not to mention the thinner shafts on the GTs...

rapidcossie

Wrong

rapidcossie

http://www.turbobygarrett.com/turbob..._700382_12.htm

glancy2081

gt30 best 500bhp turbo i am informed

Miller 3

iTrader: (4)

My bag...

thought thay was maxing out at this point...



Euan please discourage me im starting to stray

rapidcossie

T4 is the way to go

leecavturbo

probably the best suited turbo to 4cyl 2.0L out.
for the biggest range of outputs too. from 380 to 550.
like mark says the spool will be better than a T4.

Miller 3

iTrader: (4)

Must have results'

Can feel the force pulling me'

No must go T4'

But the GT serise is so tempting'

T4 i tell thee "stay strong luke"'.

BEN FRST

my buisiness partner runs a gt30 on his 3 door and has no end of trouble with it i would stick to the t4 if i was you mate.

M K

iTrader: (9)

i changed from a t34 running agressive ALS on my 1600cvh to HYBRID GT30 and it was like driving a different car,

it spools up so much quicker than the t34 and does not require the help of the anti lag, although i do still run mild ALS and i dont run a dump valve and never have,

good enough to run a 12.6 second quarter so im happy

Rippers

Dave I would have thought your T34 would have been capable of producing more then 310bhp on a ZT, is it deffinatly the turbo thats holding you back?

Staffi

iTrader: (1)

Are you saying that just as a strength issue Euan?? Explain why??

rapidcossie

I dont know much about strength of GT turbos mate.

I only know about T4 turbos as thats what I have ran for nearly two years.

Someone give me a GT30 and ill test it for them

rapidcossie

Like Paul says, a correctly specced T34 can make 400 bhp on a YB so it should produce the same on a 2.0 zetec.

Staffi

iTrader: (1)

Euan, where does your T4 come in at??

My T38 kicks in around 3800...

Big Will_

Oh - and you can get 500bhp with a GT3076 on the larger AR turbine housing

rapidcossie

I have 2.6 bar at 4k

rapidcossie

awrighty mate.
sorry I never got a chance for more than a hello at Nat day

Staffi

iTrader: (1)

I bet that's a handfull in the wet then.. or DRY...

Big Will_

No worries

rapidcossie

It does sometime catch you out in the wet.

Wheel spins on about half throttle in 4th

Will wheel spin in 5th if you let the boost come right in too.

Wheel spins in 3rd in the dry too

This is with 235 F1's too

A proper rear set up is needed at this power level but its too expensive

Going to have the rear shimmed up to try to it on the cheap.

Staffi

iTrader: (1)

Mate, this Quafe diff and Zoo beam and TCA`s on mine make the car handle superb, doesn't feel like RWD.. the grip is mad mate..