GT2056
Turbo Mini Forums

I've just bought a brand new GT2056 of the bay for an attractive sum. Advertised as a Renault Mascotte turbo and just a picture of the box.



This is the big brother to the GT1752 and has that little bit extra flow for 200hp plus.

Great efficiency for a 1293 at 15-20psi boost. Potential for 250hp.

The only down side is the fact that it is oil cooled only.

I know that in the past the general consensus is that water cooling is not necessarily needed, but given the output we are looking for, would it not be advantageous?

An option may be to fit a water cooled core from a GT17. Does anyone know for definate if they are interchangeable at all?

Thanks in advance.

Edited by Paul S on 26th Jan, 2009.

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."

pretty sure the core is inter changable, as the rebuild kits do from gt15-25

i have a spare gt17 core from a knackered turbo if you want it.

i spent some time looking at the maps for these a little while ago.

seems like a rather efficient turbo at around 15-20psi. although my map reading skills are very limited! im still trying to figure out how to work out spool up etc etc

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."

ssshh i though the turbo was going to be a secret.

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."

arnt these turbo's used on the mg zt? if so they should be fairly easy to find?

Edited by Paul R on 27th Jan, 2009.

Drives
-Ford S-max Mk2 Ecoboost
-Rover 100 VVC #2 - track project

Searching is all you need on TurboMinis

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."

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

Well, it has just turned up. I'll take some photos alongside the GT17.

First impression is that the turbine is an 12 blade design with a more axial flow component and the turbine housing is tiny.

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."

Photos with a GT1752:








Just a few millimeters bigger across the compressor housing, so it should fit without bulkhead mods on a custom manifold.

Also the centre section looks the same, at least length and spigot wise. Worth stripping it down to investigate.

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."

Thge turbine is very interesting.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph

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."

Very axial flow..... are there any guide vanes (static obviously) behind it ?

Axial flow could also mean higher thrust bearing loadings unless they have managed to balance it out at the compressor end but it looks pretty centrifugal from the photo.

Schrödinger's cat - so which one am I ???

No guide vanes, but they use a scroll type volute that does the same job.

Good point about the thrust, although with a lower DP it will not be much worse.

The GT17 also has a scroll volute and a high axial component, but not as much as this one.

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."

Schrödinger's cat - so which one am I ???

i 'm a bit worried about the text on the bott left of the page Paul,


" click for flange dimensions "

WWW.FORCE-RACING.CO.UK PLEASE CLICK HERE

The flange is the all important component.

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."

Will that fit a mirage manifold/downpipe?

Lightweight racer coming soon.

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."

This seems the most appropriate place to put some extra information on this turbo.

Chart of turbine performance on a 1293:


Plotted on the compressor performance:


The red lines represent the spooling up and then boost controlled as they go horizontal.

Funny, but I've recently seen a rolling road curve for a 1293 that behaves exactly the same

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."

Just picked up a good one of these up for an attractive sum. Now I've got to mate it to the metro manifold and fashion a downpipe for it.

I'm still a bit green when it comes to reading compressor maps but would this perform satisfactory at about 12-14psi on a 1310? I'm looking for a better response than the original T3. Otherwise I'll hold on and put it on my high boost 1380 build later.

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

Can you change your avatar, it's affecting my concentration.

The GT2056 will work ok at 12-14psi, but will really pay dividends once you get into higher boost.

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."

Thanks for that Paul.

I'll give it a go for now. Basically I've got a 1310 turbo which is going to be a 130bhp-ish road car and I am also building a 1380 high boost weekend warrior.

I think I will use the 1310 to build the GT20 downpipe and change to a GT17 on it at a later date when I find a reasonably priced one.

Edited by John on 18th Jan, 2010.

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

The lower red line on Pauls map seems to equate to around 150bhp at what would equate to 12 psi at the inlet.

So looks good, but as Paul says, it's just as good at 180 bhp.

Fastest 998 mini in the world? 13.05 1/4 mile 106mph