captiva

Trying to upgrade to T34 but cannot get treated seriously as I reside in Canada but have been offered a T4 locally and at a good price. If I fit this to my Stage 3, 803's, 3 bar, etc. what are the advantages/disadvantages ?

tabetha

You will have an enormous amount of lag, these things don't get into full song until 4500rpm, but sound like a jet fighter when they do!!
Would give you a lot more scope for more power if you want it ?
Parts(some) are getting VERY hard to get hold of for T4 now.
tabetha

C0S_TURBO

Have got a T4 on my RS500 at 26psi great fun on the motorway! On my 2wd saph had a MD67 T3 was great for around town spun up very quickly!

rinus_2005

iTrader: (1)

sounds like a jetfighter eh, I should get my hands on one too

TurboShed

There's a T4 on your RS500? Wow, fancy that

captiva

OK thanks I guess I will go back to trying to source a T34

tabetha

T3 and T34 core(bearing housing) is one and the same thing.
You can have your compressor housing machined out to T34 size with T34 wheel, so don't even need to buy new pipes either(T34 bigger).
very easy mod, and same size as T34(large escy), which reduces down when you look down the throat anyway to same size as you can have yours made to.
tabetha
ps don't forget 360 bearing and step gap seal

cossie604

iTrader: (2)

Think a few companies are now remaking parts for the old T4.

Pros:
Sounds like a jet fighter, as already said
Loads of scope for more power at a later date
T4 turbos are extremly robust units as they dont really have to work very hard on a cossie imo
Your charge temps will be lower for the same amount of boost comapred to a T34
Your engine bay will look god like
Women (or what ever your into) will instantly want to pleasure you in what ever way your into
Lag is a good thing....nothing.....nothing........nothing......s omething....little more....then........FUCKME!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!!!!!!!!!!!!!!!

Cons:
Can be costly to buy but rebuilds are cheaper on these when compared to the GT range imo.
er...
dunno.....
um.....
You'll have to change some pipe work and a drop bracket is a good idea.
er....

TurboShed

LoL I like that.

rinus_2005

iTrader: (1)

col cos1

iTrader: (5)

heres my bay.....................t4 all the way

cossie604

iTrader: (2)

And here's a little pic of my T4'd bay...its come along a bit more sinc ethis shot tho....

captiva

Does the 360 bearing fit a T3 without mods and the step seal too? I guess the chip has to be re written

tabetha

YES,YES,NO in that order!!
The bearing will fit no probs as will the step gap seal, the chip does not need to be re written, as fuelling is dependent on BOOST, if it is set to the same BOOST then the fuel requirements are the same, the engine does not know what is producing the boost!!
The window will be slightly different so may be a little riucher at slower speeds but this is a step up to a higher power anyway so is perfectly safe for the meantime, just get checked to be on safeside with FULL LOAD FUELLING CHECK.
tabetha

rapidcossie

ill join in

cossie604

iTrader: (2)

^^^ A good addition to the photo game and also the same car that was the final push for me to go for the T4 route after seeing Euan's car perform in the mags

captiva

[quote="tabetha"]YES,YES,NO in that order!!
The bearing will fit no probs as will the step gap seal, the chip does not need to be re written, as fuelling is dependent on BOOST, if it is set to the same BOOST then the fuel requirements are the same, the engine does not know what is producing the boost!!
The window will be slightly different so may be a little riucher at slower speeds but this is a step up to a higher power anyway so is perfectly safe for the meantime, just get checked to be on safeside with FULL LOAD FUELLING CHECK.
tabetha[/quote

Thanks for all your help (and patience) as someone on this page once said "YOU ROCK TABETHA". Am I right in thinking that the T34 would not be working so hard as the T3 to produce the same boost pressure and that if I did have the T34 and increase the boost pressure the map would automatically increase the fuel to compensate as it recognises the extra air

rapidcossie

not had it timed since the new inlet and cooler set up mate, so should nudge the speed up a wee bit this year.

few ideas for the T4 too

captiva

Thanks for all your help (and patience) as someone on this page once said "YOU ROCK TABETHA". Am I right in thinking that the T34 would not be working so hard as the T3 to produce the same boost pressure and that if I did have the T34 and increase the boost pressure the map would automatically increase the fuel to compensate as it recognises the extra air

rapidcossie

One thing tabetha has wrong is the revs that a T4 can have full boost.

Mine has full 2.5 bar by 4k.

Alot of other work has to go into the engine to help with this but it proves a T4 doesnt have to be THAT laggy.

Im sure Mike R's T4 on his old engine came in quicker than mine.

cossie604

iTrader: (2)

What specs your T4 then Euan? Mines just got the modded penny along with a 360, built by TD. Havnt had chance to run it properly yet due to being on my basic running in chip at present Also, who's swedish manifold have you gone for as there seems to be alot of suppliers out there now offering them with different results/reports off people.....manifold and decent head work is my next thing on the things to do list (a list that seems to grow )

captiva

What revs does the turbo start to spool up

tabetha

Okey dokey 4000rpm a T4 gets full boost, trouble is it does virtually zero on the way there, so a std T3 would be home and it's owner eating his tea by then!!
A T34 can hit full boost a lot sooner(of course).
Always spec for the smallest possible turbo you can as you have less lag more lower down torque which is what makes the car better/faster with little effort, instead of waiting for the turbo to spool and then playing catch up, by which time you are at the next corner and it starts all over again.
A chip will only recognise up to a certain point, ie if it has not been adjusted to recognise 25psi instead of 15 psi it won't, but of course all have some extra ability built in.
This is why I like 3d ecu's many more features, which work out way cheaper in the long run and is way way more adaptable than ford stuff ever will be.
I regularly take on much more powerful cars and win as the torque curve on mine is so much better, plus it makes it so much better to drive 90% of the time.
tabetha

rapidcossie

Not 100 % sure of the spec of my turbo as Alan at AVA just plays around with it when he can and has tried a few diff things with it.

My plenum was made by Tom at AVA and my inlet manifold has been ported out and flowed/matched to the head.

I have a massive throttle too, all this prob gave me 30 bhp.

rapidcossie

tabetha...there is my boost plot....make from it what you will

trevCOSS

iTrader: (6)

Are you sure a 360 will fit no problems? Im sure that the core requires some machining due to the thrust washers being larger dia??