T3/T4 Turbos

[slighty_sykotic]

Heya,

Can you masters of the T3/T4 (i think thats what they are called) turbos explain to be the trims, and what would be used on a 4agte..

I have search, but i can't find anything, I think I may have got the name wrong.

Do you know what im rambling about about?

Going to build another 4agte, but want to use something a bit bigger than a td04 this time around.

--Sykotic

[Lith]

The trim is basically a calculated number represents the ratio between the inducer and the exducer of each wheel. I'd assume if you are asking for some detail on turbos you have a basic understanding of what they are?

On the compressor, the inducer is the bit that draws air in from the outside world (and therefore is more or less the biggest defining factor in terms of defining how much air the turbo MIGHT be able to move), the exducer throws the air against the compressor scroll and as a result mainly affects spool and also the amount of boost producing ability (ie, outright pressure ratio) the turbo has. A bigger exducer (compared to inducer) will have a higher pressure ratio efficiency - and in turn often have a "safer" relative surge line. A smaller exducer will be more inclined to surge at higher PR and low air flow levels and probably be a bit laggier, but will also be less restrictive and therefore will be capable of flowing more when it gets up and going.

On the exhaust side, its a similar story except - the inducer is the "big bit" which catches the gas and its guided out the exducer.

Generally speaking, the "bigger" the trim, the more aggressive the wheel is - or should I say, the inducer and exducer sizes are closer together in size. The smaller the motor, the smaller the trim you should probably go for - as you're probably both more likely to need spool over peak air flow, and you're also more likely to be susceptable to surge.

With a T3/T4 on something like a 1.6l, you're probably going to want to run quite a small T3/T4 - ie, .48a/r turbine housing and some sort of <.50trim T04B compressor wheel or something like that.

An all important thing you should decide, or tell us - is what you hope to achieve from it??? A TD05-16G from an EVO will probably flow similar to "small" T3/T4s and be well efficient on a 4AGE, as well as spool at least as well.

[Bazda]

bah dont go small go big.

I would put a t3/4 with a 0.63a/r on the ex side
57 trim compressor wheel with a 0.5a/r

[IH8TEC]

bah dont go small go big.

I would put a t3/4 with a 0.63a/r on the ex side
57 trim compressor wheel with a 0.5a/r

they go very very well

[slighty_sykotic]

Prefect, and thanks for the info above Lith.

Where do you reckonmend getting one from? Trademe?

--Sykotic

[slighty_sykotic]

IH8TEC, your motor got toyota pistons? 8.9:1 ratio?

If so, when do you get boost?

(assuming this is the turbo you and bazda are running)

--Sykotic

[slighty_sykotic]

http://www.trademe.co.nz/Trade-Me-Motor ... 957792.htm

That one there...

Thats not quite right is it... its got a 0.60 A/R Compressor side..

You reckon a .5a/r ay...

--Sykotic

[slighty_sykotic]

Ahh, I forgot to ask, dump pipes for these....are they made? or are they all custom.

And do they have internal wastegates?

[slighty_sykotic]

http://www.trademe.co.nz/Trade-Me-Motor ... 757899.htm


AHA! that one


And I see they use external wastegates.

[Bazda]

None of those

Brendons car is 8.0:1 and full boost is at 4k

If you want one pm me, sideways also wants one the same as brendons, so if you also want one I will make an order.
And mine will cost less than the ones on trademe

They have a hole for a internal gate but Im not sure how it would work as its just a hole and no flap valve thing. One off another turbo would have to be adapted on.

[Crucible]

sideways also wants one the same as brendons, so if you also want one I will make an order.

Hmmm soon just about every 4agte on this forum will be running T3/4s.

Geez Bazda look what youve started lol

[IH8TEC]

IH8TEC, your motor got toyota pistons? 8.9:1 ratio?

If so, when do you get boost?

(assuming this is the turbo you and bazda are running)

--Sykotic

its about 4500 when i get 20psi aftermarket computer you could get it sooner by bumping timing etc up.

run 4agze 8.0:1 pistons

[Bazda]

sideways also wants one the same as brendons, so if you also want one I will make an order.

Hmmm soon just about every 4agte on this forum will be running T3/4s.

Geez Bazda look what youve started lol

not only just me! Glenn started the ht18 trend hehe

[~SlideWays~]

Bunch of freakn boost junkies

[Lith]

bah dont go small go big.

I would put a t3/4 with a 0.63a/r on the ex side
57 trim compressor wheel with a 0.5a/r

Is that what you are running on yours?? You're making some good power out of it too if it is

I'm quite impressed at how the T3/T4s appear to be spooling on your 4AGTEs!

[Bazda]

bah dont go small go big.

I would put a t3/4 with a 0.63a/r on the ex side
57 trim compressor wheel with a 0.5a/r

Is that what you are running on yours?? You're making some good power out of it too if it is

I'm quite impressed at how the T3/T4s appear to be spooling on your 4AGTEs!

No i'm running even bigger and I get full boost by 4000rpm
Also i've maxed the turbo out, its rated to 500hp

[Crucible]

I'm quite impressed at how the T3/T4s appear to be spooling on your 4AGTEs!

I have the same spec T3/4 as barry, his old split pulse manifold (as split pulse T3 flange) on a 8.9:1 gze and I see 12psi @ approx 4600 - 4700, but thats with stock ecu!!!!!!
They are good turbos, im real happy with mine and I really couldnt image having a smaller turbo now.....

Lag smag you guys will love the power they give up high

[Bazda]

I'm quite impressed at how the T3/T4s appear to be spooling on your 4AGTEs!

I have the same spec T3/4 as barry, his old split pulse manifold (as split pulse T3 flange) on a 8.9:1 gze and I see 12psi @ approx 4600 - 4700.
They are good turbos, im real happy with mine and I really couldnt image having a smaller turbo now.....

Lag smag you guys will love the power they give up high

weird how ur ones kicks in like similar to my 8.0:1 compression eng running afm.
I was running bluetop cams, that may be the only difference

[Crucible]

weird how ur ones kicks in like similar to my 8.0:1 compression eng running afm.
I was running bluetop cams, that may be the only difference

yeah must be, I know Im lacking fuel down low also, maybe more timing off boost will improve things a little.
I have some bluetop cams ready to go in, also 7mgt 440s and pump, just saving for ecu and tune now.
I cant wait, sick of talking about it, I just want it done now lol, decided to go with speedtech for the tune, he seems to knows how to get the power out of these....

[flygt4]

weird how ur ones kicks in like similar to my 8.0:1 compression eng running afm.
I was running bluetop cams, that may be the only difference

yeah must be, I know Im lacking fuel down low also, maybe more timing off boost will improve things a little.
I have some bluetop cams ready to go in, also 7mgt 440s and pump, just saving for ecu and tune now.
I cant wait, sick of talking about it, I just want it done now lol, decided to go with speedtech for the tune, he seems to knows how to get the power out of these....

mine goes back to STM on the 16th , thatll be the 3rd time ive been there. i only go back coz im happy with the previous tunes just a quick dyno and tidyup of fuel maps now im spooling 500rpm earlier.

the t3/t4's are awesome , you can choose your trim whatever you like.
i have a new garret t3/to4e here that has 0.6 comp and 0.64 exh but im pretty sure itll be too large for my lil 1600.