Franco

iTrader: (2)

APART FROM THE BEARING CORES, WHAT ARE THE ADDITIONAL DIFFERENCES TO BOTH OF THESE UNITS?

(EXCUSE CAPS, I'M DOING CUSTOM ENTRIES............)

Carlsworth

compressor sizes, trim sizes,
gt is more compact while still being effiecient and durable

t38 is laggy, but tried and tested and much much cheaper....


carl

Franco

iTrader: (2)

COOL SO THE IMMEDIATE BENEFIT WOULD BE THE LAG DECREASE USING A GT30........

Richie.

iTrader: (5)

Trying to justify buying one to the missus eh Jase ?

Having driven Marco's GT30 and my T38 they are both miles better than a T34/35

Carlsworth

yup...


but as they re commercially derived, they are great on low blow ie diesel tractor/plant machinery engines etc..

but when masive power with such quick accelerating/decelerating enigne, ie cossie and the like, the heat created is much greater, and the gt suffers from this




carl

Franco

iTrader: (2)

(camp)B9KOS

Mate you dont know the half of it! I'm sure she's told Martin to ignore me!

Carl,

So that'll explain why the water needs connecting & you cant run Anti lag (but then if it spools up faster, surely the ALS becomes a toy??)..

bud-weis

Good thing with the T38 is it's a good strong unit, near bullet proof,like the T34

i have heard you can run anti-lag on them, but i don't know if that is 100% fact or not.

Carlsworth

well, they spool up faster, but they aint a massive difference, so antilag can still be used effectively


the big power skylines/evos/supras etc, run gt series, but they are usually 1/4 mile cars, and are expected to have a short life


when i say they suffer at big bhp, i mean like 600 +


for a road car they re good, but if not looked after they will spit their dummy quicker than a virgin spitting cum



the amount that we get that need to go in the bin is shocking
because of delicate parts, immaculate oil is needed when running decent power

Carlsworth

bud weis


you can run anti lag on pretty much any turbo if you have the want and money



but, imo, anti lag, would best suit the t series rather than the gt

bud-weis

i meant that i'd heard about people using them to run anti lag as they come, without any other special parts being fitted.....i know mine cost about a grand (with exchanging a T4 variant too!!) so it bloody should LOL!

redcossie

i have a gt30 on mine,did have a t38 on it,and must say the lag
it a lot less with the gt,and it just never feels like its going to run
out of puff..

Franco

iTrader: (2)

Intresting reactions, i'd be more inclined to go for a turbo which Martin suggests TBH....

But obviously i knew there was an issue with regards to anti lag and its effects on GT series turbos.

Dan@Rapid-Ford

iTrader: (5)

I thought the T38 was a step inbetween a T34 and a T4

I've not run mine properly yet so don't know what to expect from it.

Franco

iTrader: (2)

It is Dan!...

Stavros

WTF carl Wheres your experience of this?

commercially derived no more than any other fucking turbo

only usually on 1/4mile cars, yeah, right-o

when most peoples big boost T34s only last a year or so hard use, the whole thread here is pretty comical

Dan@Rapid-Ford

iTrader: (5)

thats what I thought. So how come peope are saying they are laggy? they're supposed to have the same exhaust housing as a t34 but a t4ish front end.

Which in theory would mean it will spin up like a t34 but flow more air becuase of the comp housing - and surge its tits off

I suppose I'll have to see how mine goes. I've got the early one TT one

Billabong

My HG-T38 pulls like a train to the limiter, doesn't run out of puff. Isn't any laggier than my old 'T34', and doesn't surge.

Franco, listen to Martin - he built your engine.

Bullett

iTrader: (2)

iv edriven a car at over 450hp and im sure it had a gt28 on it,the response is superb!so smooth and very quick right up to a good amount of revs,wermet mine so i didnt get close to the limiter but i have to say it made my t34 look shite

radiant red

Dont know much about the differences but i can say the t38 TT unit is on full boost at 3600 (32psi) and its a very strong unit. Well recomended

Dan@Rapid-Ford

iTrader: (5)

3600 sounds good.

What the spec of your engine? if you don't mind me asking.

pete mcrash

iTrader: (1)

...........i've got a ut t38.............looks like a t34 but with bigger internals and a t4 arse end.................apparentley good for 450+bhp...(what i've been told)....its fookin' sweet....................

Kelv

iTrader: (4)

thats what i had on my old setup, turbo was brilliant, but then it suited and complimented the engine!!

Franco, as Bill has said - listen to Martoon. see what he recomends for the engine that 'HE' has built!!!

david

Has anyone brought out an internally wastgated GT30 yet that will bolt onto a cossie manifold and would it be wasted on a sub 400bhp engine ?

K.Goa

I have one, but not yet bolted on..

cossie4i+

iTrader: (15)

I will fit my TT T38 one day

Steve.

marco polo

iTrader: (1)

hi lads

i have never had a t38 so i cant really comment

all i know that my gt30 makes positive boost at 2500 rpm in 1st gear

i dont have any surge issues at all

I think it is a great turbo but they are most defo weaker than the old "T" range

i dont you why you dont try a "T" 34 with the GT roller bearing cores inside them they make very good power aswell performance ford did a test on them and they made a hell of alot of power over the t34 with the old stuff in it


getting back to the gt30 with the internal waste gate i think its a good turbo i dont know how long it will last as for the power on what it can make im not sure


I cant wait untill it's live mapped i recon it will be good enough for me ill be very happy if it makes a gen 420bhp that will do me more than enough for track use


marco

Carlsworth

stavros,...




a) my experience is the x amount of customers that have binned the gt off and gone for t seires, and almost all had the same issues...heat soak of the core
b) oh, and where did i state that the gt seires "only usually" (which is a contridiction in itself) used in quater mile, as i was referring to anti lag setup....not exactly common for road cars to have anti lag...
c) i also meant that the gt series is most commonly used in low blow equipment.....ie :anything diesel

radiant red

Raised comp,BD14 inlet, standard exhaust cams,ported head,2wd manifold,4X4 inlet. Siemens injectors etc etc.

1st and 2nd see about 30 psi then its up to 32+ psi the rest.

lukeytheduke

so is there a way of adding extra cooling to the GT then as i f i have been reading write, if cooling can be advanced the GT series would be a winner??

Carlsworth

its not the cooling thats the problem,

its the bearing housings
they re not made of the same material as the t series, and are more susceptible to "expanding" inside the housing around the shaft, causing shaft movement


as siad....
for road car use, they re great units

Franco

iTrader: (2)

Kelv
Billabong


Yeah deffo going to go with what he suggest lads, just wanted to know for my own information the difference.

radiant red

The fella at turbo technics were explaining to me how the cores are ok untill they they get over heated then its goodbye core hello empty wallet this is why they cannot warrent them. Apparently they are developing a roller core to slip into a reguler turbo so we can swap them over,he did say it is in distant future. Something to look out for tho.

Franco

iTrader: (2)

Can anybody supply me with a compressor map for a T38??

Martin wants to see one to compare against a GT30 map!

Also is there a difinitive anwser to how much hp a GT30 will make running at MAX - Seems to be a grey area..... MAD lot maybe?

Ps Mike R............

Before you start, See below!:

T38 - roller-bearing core
Full ceramic roller bearing core at both ends, brand new - 44lb air flow - good for 460+bhp. Delivery is EXTRA - cost is outright.
Ł1,100.00
Details

T38 - standard core
360° bearing, 7° cut back blades. This flows 43lb - so good for 450+bhp. Delivery is extra - cost is outright.
Ł950.00
Details

GARETH T

Franco

iTrader: (2)

You know how he gets Gareth, thought i'd beat him to it!

RS500/364

so why did my all signing and dancing t34.3 hybird not last over 2000miles !!

Mike Rainbird

iTrader: (3)

Because it is a 370bhp turbo that you pushed to over 400bhp .

For people's information, please note that not ALL T38s are the same. The ones that I do have both the compressor AND exhaust housings machined to take bigger front AND rear wheels (hence the increased airflow). Please note that I have been conservative with the power out-puts, and depending on what spec the engine is, more should be able to be gained if the turbo is pushed hard (as can be seen by the fact that a normal T4 goes all the way to 520bhp and that only flows 48lb of air!).

JonnyBravo

Turbo Technics claim that that their T38 is good for anywhere between 420 and 480, obviously i think the 480 is a bit high but 450 must be about right on a well specced engine

Mike Rainbird

iTrader: (3)

YUMs made 466 on the TT T38 and I think he pretty much maxed the turbo out

JonnyBravo

Thats good to here, always hear mixed stories as there are a few different T38's about .

420-450 MAX will do me fine.