NEEDFORSPEED

i think theyre completely open arnt they?

Bullett

iTrader: (2)

that looks like the gt28 i was looking at in the blokes car the other week.and it had the a/r.70 on the housing.am i being a thick cunt and missing something?

Kelv

iTrader: (4)

Nil, thats a GT30.76 with the .82 exh housing.


the turbo and the PJ link pipe with the wastegate etc came off a Mark Shead engine runing 500/500 with perfect boost control.

Bullett

iTrader: (2)

Kelv
im fooking confused now. so do the markings on the front mean anything? or could the so called gt28 he showed me have that front and a different back? im so thick with these i know what a t3 t34 and t4 are and look like and thats it.

Miller 3

iTrader: (4)

Maby it was a GT28 with a 30 compressor housing

Bullett

iTrader: (2)

argh! now that means what?i take it the front part with the a/r.70 on it is a gt30 then.

Martin-Hadland

iTrader: (2)

It looks like a GT30 to me

Miller 3

iTrader: (4)

TBH there are so many different variants but the way i get it is that the core is the main part of the turbo i'e size of the shaft and wheels

Franco

iTrader: (2)

Following on from this, I got my GT30 on Saturday off Martin H!

But what connections do I need for it, I've got the water banjo's from my old T34, but cant remember what else is needed! whats the oil return like on a cossie?!?!?!

Any of the related items on the bottom of this page help?

http://www.atpturbo.com/Merchant2/me...egory_Code=GRT

Stavros

a/r .70 means fuck all really mate, could be GT28, GT30, GT35, versions of all of them have a/r .70 compressor housings

Porkie

iTrader: (1)

I drove the Sierra quickly the other day. Sweet mother of GOD that GT30 is the BOLLOX

I LOVE my engine.

Stavros you NEEED to drive it.

Stavros

I know I know, dont tease me

Chip

iTrader: (3)

Id like another go now sometime too please Lee

Porkie

iTrader: (1)

Its got some brake pads in the calipers now too mate

Always a bonus in a 600bhp car

Top mod that

Chip

iTrader: (3)

Even better

K.Goa

@Lee, what spec is your GT30?

Chip

iTrader: (3)

Im going to guess that its a 3076 with a .82 hotside housing

Im sure Martin will know if Lee doesnt remember the details

RWD_cossie_wil

iTrader: (9)

If my T38 turns out to be dissapointing, I think it will have to be a GT30 ... What trim are you going for yeti? And what cams will you be running? will they all do 500ish BHP on the right core engine?

Chip

iTrader: (3)

You can see over 550bhp on the right GT30 mate.

500 is certainly not a problem for the 76mm compressor wheel variants and you will just about manage it on the 71mm one on the right engine.

RWD_cossie_wil

iTrader: (9)

just want to keep it as low lag as possible. - seeing close to 500Lbs ft of torquewould be nice as well, 500BHP would just be a bonus.

Chip

iTrader: (3)

A 3071 would be a lot less laggy than the larger 3076 that seems common with the cossie boys, and would get you up towards 500bhp if not actually quite to that exact figure.

RWD_cossie_wil

iTrader: (9)

that would still be on an external wastegate?

lead_foot

iTrader: (1)

IMHO a 3071 It should be able to make 500bhp @ 6500RPM @ 30psi.

Chip

iTrader: (3)

Either mate, you can get them with internal or external.

The internals are actually about 20 quid cheaper!

Gatecrasher

So does this mean your keeping the car?

Franco

iTrader: (2)

Gatecrasher

I bought that over a month ago Ben, only picked it up Sat.

Chip-3Door

It might be cheaper Chip but its at a cost! Not sure why or how but the internal produces less than an external gated affair!

I'm sure Martin will enlighten us!

lead_foot

iTrader: (1)

The internal watesgate can be too small and in a position that creates turblance which can make the turbine wheel over speed or something like that.

Chip

iTrader: (3)

If its out and out power you are after, the external one is a better option yes mate.

Internal one is just popular as its a more simple direct replacement for a T38 etc.

RWD_cossie_wil

iTrader: (9)

saying that, If I go GT 30 then the 4x4 manifold will have to go as well won't it?

Chip

iTrader: (3)

Not sure on that on the 3071 as the compressor housing is smaller so may still fit, im sure martin will know though

RWD_cossie_wil

iTrader: (9)

don't think the 4x4 manifold will flow enough for 500ish will it?

Chip

iTrader: (3)

Im sure you could get it to with a decent port job, they are fairly thick walled, but again Im afraid ive never bothered tried, as I prefer the rwd one.

radiant red

Spec example:

Standard comp healthy rebuilt engine with mild head porting and standard cams. 2WD exhaust with 4x4 inlet, grey injectors and the 3 bar 044 etc. Now with a t34 am i right in saying 400 is the limit? maybe with a cam swap?

What benefits would a gt30 have over t34 with this spec? and what kind of power could be expected?

Franco

iTrader: (2)

Not too sure if theres anything wrong with the 4x4 manifold, thought it was mainly to do with the fitment as Chip has mentioned.

But when talking inlets............... Oh there's a can of worms!

Ps I'm running the small turbo inlet

Chip

iTrader: (3)

another 100bhp as a ballpark IF the head is up to it, but you will need to change the inlet to see it.

RWD_cossie_wil

iTrader: (9)

I'm running a small turbo inlet as well, as I have a small turbo car .
Sweedish plenums are a waste of time unless you are after ultimate horsepower, they ruin low down throttle response. Even a std 4x4 plenum with a 14mm spacer will run well over 600BHP, so why change somthing thats not broken?

On the 4x4 exhaust manifold I am sure I have heard 450BHP is the flow limit?

scoooby slayer

iTrader: (4)

well im running 4x4 plenum with no spacer and made 472.3 at 30 psi. and i hold over 32 on the road so its over 480 in fourth and fifth gear. im on the limit of my inlet and head now though.

radiant red

The inlet cam? or the manifold? Thats a fair increase in power

Franco

iTrader: (2)

Inlet manifold mate