This could lead to all kinds of debate but I'll ask anyway

So I have a T34 55 from my cossie that needs rebuild/changed as it has lost a blade from the rear turbine. It's a Turbo Technics unit.

So I need to post the turbo away to get serviced or replaced. Do I use TT as that's where it came from originally?

My car was built to '400/400' spec and is excellent to drive. Should I consider a turbo upgrade to say a T38? If so which is the T38 that everyone is raving about? I think it might be TT? BTW the rest of the engine spec is '500 bhp capable'. I'd obviously need different injectors etc(greys currently).

Would TT allow me to exchange my T34 against a T38?

I'm swithering against the upgrade as I raced an MSD mapped T38 car ('450 spec') and was hot on it's tail and it did not pull away at all. Then on the other hand I look at the power steve gets on his 4i and think it might be worht a look.

I'm abroad just now so asking here instead of making calls to my tuner just yet. I will however call TT and book the turbo in later today hopefully.


If I go down the T38 route I'm not sure what else I would need...

Oh and I just checked the spec of my engine and the head is '24.5/26' ports. How much bigger than standard is this? What power can/should this flow?

Cheers

Chop

 

Talk to Tone the moan before you do anything with the turbo. He will be able to sort you a great deal with TT.

If it was me, i would stick with the T34.55

What inlet cam are you running ?

Steve

 

id ask who ever you use to map it as some like t38s and some dont!

 

He can suck my plums because he gave me a shitty infraction when noone else got one!

I can only describe them from the paper work as 'NMS spec' I'm afraid.

Why would you stick 34?

It is a bit of a heart/head decision really. I know it's easier to stay with what I have and it's more than fast enough. I'm not really a numbers chaser.


A big thing to consider is the fact I'm taking the car to Australia later this year. I don't need the hassle of a highly tuned car in the heat.

Anything I should consider for having the car in potentially fucking hot climates?

 

I do realise this.

It'll be NMS if anyone knows the answer!

 

tt36 if you want response and punch 440 bhp max
tt38 if you want power
there are many more turbo's available but this is the answer to your question

 

[QUOTE=Lambchop;5853666]He can suck my plums because he gave me a shitty infraction when noone else got one!

 

T34 is the perfect road engine, end of. Unless your flying up motor ways then there isn't a lot that will catch you for nipping about. Is stay with it. You've a nice ported head. With a decent inlet cam you could make a sweet 400/400 engine. None of this ab07 shite though you want something reasonable hot on the inlet and timing key,

Best advise though, ring Karl and talk to him as all tuners have different ideas

Your head would take a t38 though but you loose a lot of bottomend, and would only be catching a t34 engine from 4th onwards

Again depends what you want from the car and its main use chop

Jim

 

Cheers for the reply Jimbo. It's confirming what I already suspected.

Like I said the car is coming with me to Oz. Roads are apparently not great there in general so certainly wont be a top end speed car. I'm no hero racer and it's not a track car.

I think I need to be happy with what I have and have a less stressed engine

 

 

I'd keep the T34 as they are ment to be mega strict on speeding in Oz.

 

Stick with what you have chop, stick a bd16 in it and job done.

 

a nice spec r cooler would be on my list if i was bringing it to aus chop ,or anything to keep the temps down

i would also keep to the reliable side of 400/400 like you have ,as its a awesome setup

 

Yeah mate I meant to add that. I could get in trouble via my bike

I'll need to check what the secret squirrel spec is first!

Yup I wondered about a cooler upgrade. Hmmm.

 

What do you find so offencive about a AB07 cam then Jim ?

If you don't have valve cutouts its about the best cam you can fit. It has almost as much lift and duration as a BD14.

Steve

 

Have you considered a "cossie rich spec" GT30?

 

Thats sooooooooo last year lol

Steve

 

Its only the internet lol

I would stick with the T34 because you can use the power all of the time, with a good inlet cam as well it will hold onto the power top end as well.

My TT T38 is great but you can't use all the power all of the time, but it does go well.

I have no idea what the TT T36 is like (what Tone the Moan suggested) but it sounds like something you should ask about.

Steve

 

I think it was about 4 years ago I got him that turbo now actually, lol.


Still an epic turbo for a YB though, really well suited IMHO

 

to4b is also a good option
if you stick with old t34's you will need a few of them as they will just destroy themselves at this power level

 

any details on the diff between what tony calls a t35 and a t36?

 

I considered a GT30 before but Karl was suggesting an external gate setup and inc mapping was quite expensive.

I'd need to px my turbo for want of a better phrase. It's px or I ened to fix and sell seperately which is possible.

Do TT do GT30's?

Unusable power is a worry. I'm talking myself back to a T34 all the time because good hard acceleration and a punchy drive is where it is at for me.

 

Yours currnetly has very little value realistically.
Sell it, buy an internal gated GT30, job done.

 

This is not really something I should ask anyone other than Karl but I'm not sure why he'd suggest external gate over internal.

I think with the GT30 it was suggested I need different cams.

 

I think you need to get a drive of a decent internally gated GT30 to decide if you feel its a good option without spending all the extra money involved in going external.

I think that internal is fine on a YB at 450-500bhp on a GT30 based on the ones I have driven, I am sure Karl can ultimately gain more boost control on the external, but the internal one is "good enough" for most people.

 

That I know steve.but it isn't a good cam. Chops engine is specced for 500bhp so will have cut outs, if it dosnt it isn't specced for 500bhp lol.

People rave about ab07s not just because it's ok for standard engines but for t38 engines etc, there's much better inlet cams

IMO of course

 

as it happens I asked for a spec sheet this morning from Matt who had the engine built. Fuck know where my copy is

Anyways it says "Cosworth 7.2:1 offset pin 1.5mm TR forged pistons"

What are they?

 

Too low CR is what they are for a start, lol
Although that said I believe karl is a bit of a low CR fan from what he used to say on here.

 

LOL I guess that's a whole other argument but I'm happy for Karl to have specced it and he'll map it so that's all that matters.

So is TR the make?

 

different exhaust wheel

 

Fucking hell turbos are expensive

I just called TT

Prices

Inspection Ł55+vat if no further work taken on.

Replacement T34 55 maram shaft like I have is Ł1600+vat
Steel shaft = Ł635

No exchange is Ł150 extra.
T38 is Ł1075+vat


Right I don't need the maram shaft. Guy reckons it'll be fucked if I've lost a rear blade.

Here's a pic btw


So question is... is my turbo worth 150 as it stands?! Whats a 55 housing worth? TT couldnt price it as they dont sell individual parts.

Should I just forget my turbo exists and go buy an outright unit?

Arrrrrrrrrrgggggggghhhhhhhhh!

Believe it or not this is not cost driven. I want to choose the right fucking option.

 

They are quoting you more for a T38 then you can buy a GT30 for.

 

Anyone got an opinion on a UT T38?

 

Chop, think fast and rs mat has a marham shaft mint for sale Ł250

Ps, chip just because theyre 7.2:1 pistons they can often come out higher, dependant how much the block was skimmed and the pistons were skimmed.
As you know! So need to know what it was measured at by the builder chop!

 

Fucking love mine, mines a roller bearing one.

 

Chops such a nice guy. Doing all this work for me

 

You will get problems with the T5, diff etc if you go bigger than T34. Just my 2 cents. I dont see the T38 have any advantages over T34 drivability considered. if you swap please go for a GT3071r. Internal gate is bolt on.
The AB07 is a great inlet cam for std comp pistons with no mod. Combined with the GT30 its a perfect road spec.

 

He has uprated big tooth box so that's not an issue

 

Told you should have talked to the Moan about turbo prices from TT

Steve

 

whats that - a std engine with a gt30 bolted on? lol