1293 spec? 120bhp?
Turbo Mini Forums

After getting a run in Jay's mini I am competely convinced of the turbo. Now question is what spec will be best. I liked in his car that with the boost turned down it was no fuss (perfect for twisty narrow roads) but on high boost felt impressive (perfect for traffic light GP's lol).

So far all I have is a standard 1275 block, crank and rods.

Now what spec should I be aiming for? He is running an R5 turbo on a mirage manifold. I aim to use the same manifold, though a few people reccommended I ask here about alternative turbo's that will do my job better. Somethig with little lag is my aim.

I also have got my hands on a Sierra Cosworth intercooler for free, I assume this will do my job?

All your help is gratefully recieved!

TTFN Pete

gt15? or a gt17? both meant to be good turbos, the smaller of the numbers being the smaller turbo. i think someone was mocking a gt17 onto a mirage manifold im right in saying.

an expert will be over soon to give you some details i suspect.

or do a quick search?

I have searched so much I have started to confuse myself lol!

Thanks, will have a look for those turbos

TTFN Pete

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=358292

any help?

double post :$

Edited by Rick.SPI on 18th May, 2010.

excellent Rick!

TTFN Pete

and some gt15 info:

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=175013

:)

Pete, what sort of fabrication skills do you have and how brave are you? You could fab a manifold yourself in mild steel and save yourself buying then modding a Mirage setup if your going the GT route. I would fancy a nice over the clutch housing manifold and a gt turbo myself!

As far as engine spec goes, 100-120bhp should be pretty easy to get on a fairly stock motor with 10-12psi put through it.

Edited by Jay#2 on 19th May, 2010.

Yes i moved to the darkside

Instagram @jdm_brett

Using mild steel ( or black iron ) for a turbo manifold is fine, and rust is not a concern at all.

The temperatures seen mean that it will never get damp enough for rust to occur that is worth worrying about.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

On the road for a whole month Paul? Nice to see there are still some optimists out there.

Saul Bellow - "A great deal of intelligence can be invested in ignorance when the need for illusion is deep."
Stephen Hawking - "The greatest enemy of knowledge is not ignorance, it is the illusion of knowledge."

1. Clutch in
2. Select 1st
3. Throttle to the floor
4. Slide foot of clutch sideways
5. Rebuild engine

If something is worth doing, it's worth doing half of.

Just as an example though, and I know this is all a bit tonge in cheek, but I have a maniflow LCB on my mini. It has been on for at least 10 years. Of that 10 years it has lived almost unused for about 7 of them. Occasionally started and that is it. The LCB is in fine condition. This is thin walled mild so I can't see a thick walled turbo manifold rusting any time soon.

Well this is how I have justified it to myself as I am making a mild one....

http://www.twin-turbo.co.uk
http://www.hillclimbandsprint.co.uk/default.asp

A man without a project is like a like a woman without a shopping list.

Stainless is the material of choice but I suggested mild for ease of fabrication. It would just seem a shame to sink £350 for a mirage setup to chop it up if your able to make something yourself.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will

i beleive matty was/is making manifolds

I would imagine everything involving Matty and the development of mini parts can now be referred to in the past tense

On 12th Nov, 2009 Paul S said:

I think Gary OS has taken over my role as the forum smart arse

oh yeah the baby forgot about that.....

Yes i moved to the darkside

Instagram @jdm_brett

rusting is as much an issue with a cast iron manifold as it is with a properly fabricated steel manifold.

ie, it isnt.

As for the cosmetics....you could have ot ceramic coated which will bump up the pub HP a little.

In fact....if considering such coatings, using stainless as a base almost seems totally pointless.

9.85 @ 145mph
202mph standing mile
speed didn't kill me, but taxation probably will