Rippers

Whats the most bhp/torque you can expect to get out off a T34 on the limit.

JTECH James

iTrader: (13)

depends on ex housing,

from a .63 420 ish is max

from a .48 ,im running 370-380, but ex housings last about 6 months due to heat fatigue of 32 psi

Rippers

with a .63 sorry

JTECH James

iTrader: (13)

with correct engine spec 420 is possible, but everthing would have to be spot on spec wise to get it,

Rippers

What sort of spec would be needed mate in your opinion?

JTECH James

iTrader: (13)

well, headwork, inlet cam, standard or slightly lowered cr, possiblly a small turbo plenum,

Jasesapphy

iTrader: (1)

dont reckon you see 420, scrape 400 possibly

Kelv

iTrader: (4)

id say your spec engine would probably make near on that power on a T34.63.

Paul, what have you got going thru your mind with all these turbo questions?

Staffi

iTrader: (1)

Paul, i had a .48 housing on my 3dr, made 363 bhp with similar torque and it was a fantastic road car, the punch you get with the .48 is fantastic, i'd rather have that than try and eek out another 30-40 bhp that has slightly more lag with the .63...jusy my opinion...BHP isn't always the answer..............

JTECH James

iTrader: (13)

mine made 420lb/ft with the .48 ,kept breaking standard gearboxes

CosKev3

Got 406bhp and 428lb ft out of mine

Peaking at 35psi and holding 28psi,it lasted 6 months

That was with a 360 deg bearing and staggered seals

That was with a pair of BD10's,head work by Bluesprint,low-comp,4x4 plenum with spacer,live mapped on greys and L8 ECU

Rippers

I'm not liking my T38 and I'm thinking of downgrading the turbo size, the T4 seems to make power in the same rev ranges as mine so would gain more power but no more drive abililty.

Think I'm getting to the stage where I don't want to chase figures and want a nicer car to drive

Staffi

iTrader: (1)

Kev, have you got a turbo sorted yet??

Staffi

iTrader: (1)

I felt like that with my T38 coming from a T34.48, felt laggy, but now it's been mapped peaking @ 35 psi it's fantastic, pulls really hard too.

JTECH James

iTrader: (13)

what T38 have you got? we could swap for my mar#m shafted T34 thats done less than 1000miles

omfg what am i saying

Rippers

I would deffinatly want a Maram shaft as I have a full ALS setup that I can't use

PM me a few details mate

Mine is a UT Harvey spec T38 done er 500 miles max!

Need to run this by Harvey first

Staffi

iTrader: (1)

What are you like................

Kelv

iTrader: (4)

it realy suprises me that you find the T38 as bad as you do, i used to love mine, always felt so strong and awesome to me!!

Paul, if your thinking of downgrading turbo size, would you consider selling me a small little item that you sourced not so long ago?

JTECH James

iTrader: (13)

the thing with my engine is its gagging for a T4 or T38, its too low a CR for a t34 imo, i built the engine for the T4 i always wanted, but never got it

and for the price of my t34 mar-m i could have got one but decided against it

Franco

iTrader: (2)

Didnt Duncan mention doing this in Germany Kelv?

mechanic28

iTrader: (5)

surely a .55 is the best of all 3 not as laggy as .63 plus capable of more power then .48??

CosKev3

No m8,not looking to get one till next year

JTECH James

iTrader: (13)

it depends what application the car is being used for

Staffi

iTrader: (1)

Get yourself a GT30 Paul and get to Sheadys to set it up...

Staffi

iTrader: (1)

True, mine isn't really suited to my engine, Jim had a T4 on it originally but didn't like the lag so he PX it for this T38...

JTECH James

iTrader: (13)

how do you get on with the T38 for road use? what t38 is it you have?

mechanic28

iTrader: (5)

so what is wrong with a T34 .55?best of both worlds surely?

Staffi

iTrader: (1)

Now it's been mapped, it's fantastic, it feels really strong, comes in aroung 3.6 3.7, it's a Universal one..made 430 @ 1.7 bar, that was before the mapping last week, now at 2.4 bar, Karl reckons 450-460..

Kelv

iTrader: (4)

Erm, im not sure Jase, if we are thinking of the same person i just switched off whenever i heard his voice

JTECH James

iTrader: (13)

not if you are only after power, the .63 would be better ,and if you are not after power, but drivability the .48 would be better,

but if you want a good mix the .55 would be a good choice , its all about what YOU want

Rippers

How about GT28's? what are they good for?

Kelv its staying for now mate

JTECH James

iTrader: (13)

i want me some of that

JTECH James

iTrader: (13)

you would need to ask yourself the anti lag question though, as nobody seems to think they will stick it

Jasesapphy

iTrader: (1)

Sort out what power you want then get the smallest turbo to make that power.

This is where people make the big Mistakes.

That is why people have odd specs

I wanted 370-380 BHP, nice fairly reliable power so went for a T34.55, makes a good road turbo.

If you want 400bhp your not going to fit a T34.48 (it wont make it)

If you want 450-460, forget the T34 full stop.

Choose your power then choose your turbo

If i was starting from scratch, it would be a roller bearing of some kind

Rippers

400bhp and 400lbs would be ideal imo but responsive like a stage 3 set up

JTECH James

iTrader: (13)

if i had to chose a new turbo i would not get a roller bearing tyoe ,because as far as i understand, if they go wrong ,its basicly disposable and very expensive to replace, can fail because of even slightly dirty oil ,where a standard type will still be ok,this means changing oil even more often and the bearing carriers are made of plastic, and can melt

Staffi

iTrader: (1)

T34.63 housing then..

JTECH James

iTrader: (13)

thats T34 all day long ,with the smallest exhaust housing you can get away with

Staffi

iTrader: (1)

Think this is what Ian3dr had on his car, made 404bhp it i remeber..

Franco

iTrader: (2)

Yeah then you can spend twice a year buying new ones! Pushing a T34 to the limit (which 400/400 would be) wouldnt see it last very long Paul!

Tell Harvey what you want, I'm sure he'd cater!