t25 help
Turbo Mini Forums

hi, just wondering if i could buy any t25 off of any car and use a bleed valve to set it to what boost i want? Or does the turbo have to be specifically for a mini?

Thanks

ADAM

the question is why do you want a T25? because it sounds good?

If you're not sure on setting the boost then you shouldnt be just picking random turbo's that sound good for bar points...

have a read up on things like AR's and matching turbo's to your engine spec etc.

No good having a turbo for 10psi boost that doesnt come in till 6000rpm!

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Hi,
I'd try to use a GT rather than a T.
Ts are old technology now.
Any turbo is no good, for instance a T3 off a metro will spool up a lot faster than a T3 off a Cosworth.
Cheers,
Gavin :)

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What these guys are trying to say is a one turbo from the T3 family might behave significantly different to another T3, as it could have different compressor or exhaust A/Rs.

It might be worth letting folk know what you want from your engine, and what spec your engine is, and then they can advise from there.

I think the GT17's are the order of the day at present, or variants of the T2 family, they seem to be more efficient than the old T3's that std metro turbo's were supplied with as std

p.s its not super adam is it?

"Turbo's make torque, and torque makes fun"

"did you know you can toast potato waffles?"

Ok, i'll bite here....

The T25 has a larger turbine and compressor wheel than the T2 - and proportionally larger housings.
There is only one T25 turbine that you'll manage to get to spool effectively (and efficiently) on an A-series, and that is the 0.49
The 0.63 might think about spooling, but just won't drive the compressor at the speeds it needs to be driven at to make for an efficient boost maker.

I believe the earlier nissan 200sx had the 0.49 turbine. Certainly, the more common ones are the 0.63 are the more common by a long way.

As someone mentioned though; the 0.49 is the better option. :)

Sorry to hijack but when choosing a GT1752, Is there any particulair type to look out for, ive seen a Gt1752(H) for sale. Will this be suitable?

Cheers

Mike

1/4 Mile 14.3secs 96Mph Terminal 10psi of boost.


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all the 200sx turbo's both s13 and s14 are 0.64 a/r on the turbine side, i have a large collection of broken ones in the garage

Does this mean I'm fooked?
No one in Malta bothers with AR dimensions and shit,they just bang it on and wind up the boost!!
And I certainly can't afford a brand new Garrett.And even buying a 2nd hand from the UK would probably cripple me.


Besides I could find no mention of the GT17 on the turbobygarrett website.

Edited by El Potter on 22nd Jan, 2008.

Warning:Stig in Training

Why? What turbo do you have?

You talking to me Jay?
I've currently got the standard T3 and I was thinking that that would be way too big for the kinda spec I'm aiming at

Warning:Stig in Training

you must remember that a T25 isn't nessacerally smaller than a T3!

Yes aiming at you Elpotter dude. T3 (turbine A/R 0.25
compressor A/R 0.42 that is) is standard on the Metty turbo. Unless your going down to a 998 or want supercharger power delivery I can't see the problem.

Well actually I was thinking very very hard about this supercharger lark and it's really starting to appeal to me.
But SCs are big money so I'm forced down the turbo route due too money probs. (Remember I live a long way away from Blighty and postage would cripple me)
But I would still SC like power delivery,and anyway there's not a lotta places in Malta to max out your top speed,so acceleration is more important to me


I'll have to check what size my turbo is then. Might save myself a bundle

Warning:Stig in Training

If you can find a T3 over there with a 45 or 50-trim compressor, and a 0,35 turbine, you'll have a pretty good turbo on your hands for BIG power outputs. Definately check what is available.

Thanks dave,I'll do that

Sorry to hijack the thread BTW

Warning:Stig in Training

the s13s t25 have a 60trim t25 compressor, 0.48a/r and the 62trim t25 turbine with 0.64 a/r housing
the s14s t28 have a 60trim T3 compressor 0.60 a/r and exactly the same turbine and housing 0.64 a/r as the s13 but the downpipe studs are slightly different

Checked my T3.
On the compressor it says A/R 42 and on the turbine all I could find was A 25.

What do you guys think I should do?

Warning:Stig in Training

That is a stock metro T3.

Tell us what 'turbo' cars were sold over there would be a start?

thats a standard metro charger.

use it.

Won't it cause a lotta lag on a 1330?
I'd love to use it BTW cos I'm poor as, but I want ball busting acceleration

Warning:Stig in Training

nope,

the exhaust AR is .25 which is very small. the metro turbo was 1275cc so 1330 will be fine.

by comparison the std exhaust AR on an RS turbo (1600cc) is .36, in fact aparently some people use the .36 exh when up around the 200 hp mark.

I see.
13, you've just made a totally shit day worth living!!!! Thanks!!!

Warning:Stig in Training