970cc K-Head Turbo Racer
Turbo Mini Forums

I see your theory ... the 2056 has internal wastegate and the 2259 has external.

Does that make a difference?

Chris

Vertually no one with a mini bothers with an external wastegate, Jimster is the only person I can think of that has suffered with wastgate issues on an internal one. So i'd say it makes little difference.

Ok confirms my thoughts! :)

So am I right in thinking the GT2056 in that trim is off the Renault Mascott?

Chris

No Idea!

these 2 are a bit big.

I would like to have my max power on the right, to keep compressor from surge and have a nice boost build. The 2259 turbine is a lot too big too.
I would look at a MHI tdo4 12t or 13t depending what I find (not the 56 mm scooby 13t, the smaller 51mm one,bmw last 525tds, RR 2.5dse etc., or volvo 2.0t).
A ko4 from audi rs4:ko4025 or a k03s (k03-053/058/079; vw seat skoda 1.8t 156/180bhp) (51mm compressor) would also be more suitables.

Building it from scratch I certainly'd use a twin scroll one (cooper mini turbo , 207/307 citroen 1.6 THP) mHI tdo4 12t twin scrolled volvo 2.0t4..will do a lot to build boost

take a bit of time to calc your needs, then only select your gun.

Although Fab points out that your plots are getting close to the surge line, personally I would not be too woried, the reason being the engine is going to be living up there at max power, I doubt it will go close to the surge line much.

also I suspect the engine will not boost low down enough to get as lose to the surge line as your plot anyway.

That said, I recomend getting hold of what ever you can cheap, getting the motor built, and get some power figs, then you can gauge what turbo you need better, then spend the money on a proper unit!

i'm not that much worried about surge line,
just that to "gear" a large 56mm wheel will be less livable than a 50 ish one,as wrote some 50/51mm ones with 37/38 inducers will be more efficient and will need less exhaust "gearing" to produce the goods.
I prefer a turbocompressor to be used at full potentiel than's half.

choose your power class then select your guns.

1752.

Medusa + injection = too much torque for the dyno ..https://youtu.be/qg5o0_tJxYM

What?

GT 1752

"So wat we gonna do tonight Brain?"
"Same thing we do evernight Pinky!"
"Try to take over the world!"

Robert is hinting you should use a GT1752

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

Though so, just checking. Does anyone have the map for that turbo?

Chris

No publicly available maps for it. However Paul S did an estimated map for it based on a GT2056 map.

http://www.turbominis.co.uk/forums/index.php?p=vt&tid=140552

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

Ok .. so from that my points all move to the right a bit.

Sorry for my stupidity but what does that mean in terms of performance? Surley at max power the turbo efficiency is now worse than a 2056? Or am i talking shit?

Chris

I'll leave this for someone more qualified to answer as I am still a novice at reading compressor maps.

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

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."

It would seem that there is nothing the GT1752 can't do! It's the A-Team of turbo's!

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

Ok, well I say you know what your talking about.. GT1752 is the one then.

I can see that more of the operating range of the engine is in the higher efficiency rings, so makes sence to me to :)

Is there any special part number after the GT1752 to get the right one?

Will this be the right one?

http://cgi.ebay.co.uk/SAAB-9-3-9-5-2-0-150...=item2c5814a7d4

looks like a chinese copy. doesn't have 'Garrett' etc on the compressor housing.

Yep cruddy chinese copy.

This guy rebuilds genuine ones so this one should be good.

http://cgi.ebay.co.uk/SAAB-9-3-9-5-2-0-2-3...4-/400164187496

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

Ok they look good... they list quite a few different turbos on that listing. Which one is the correct one?

Chris

They are all pretty much the same. They were just revised as time goes on. Just order it. Make sure he isn't after an exchange though

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

Cheers for that.. spot on!

Turbo sorted :)

Whats next on the to work out list?

Rods? Manifold? Plendidlium? Etc

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

Yer tell me bout it.. long list.

Looks like I need an exchange for that ebay listing, will message him and see if he will sell one outright.

I think pistons and rods is my next port of call.

Is it really worth bike pistons and custom rods?

Or shall I just concentrate the effort/cash sumwhere else?

Chris