Turbo Identification

[S2central.net]

Ahhh the joy of buying 'RS2 Turbo' on eBay.... 'ksake

[Sonic]

lol..in this case neither were!

The "RS2" hybrid thing was bought directly from Grant and the genuine refurbed RS2 was from a forum member, used since refurb, also done by AET.

NOTE: Ive just changed the pics around because id labelled them wrong,

[S2central.net]

Oh right then - still - eBay would be even worse then...

[Costash]

Does somebody know what type of turbo is this then?? 53261015072 1821258

[twoqu]

OK!
As suspected the one without the correct comp cover has no RS2 bits. Turbines seem to go in 2mm increments. So that turbine I would say is from an early 200. Don't forget that the turbine housing/wheel/shaft are effectively matched. However that is the fabled small RS2 hybrid sized turbine. I'll have to check, but as the major diameter is smaller thamn the RS2 one, I would say its a K26 wheel, possibly a Porsche 250bhp 944T. You would need to try and measure the smaller diameter to say more accurately! I believe that you have to use all the relevant compressor side RS2 bits in a true RS2 hybrid as they are different, particularly the comp wheel which is shown on the "naked" thread.
The nice shiney one is I would say a genuine RS2 from the measurements given . Again a measurement from the smaller diameter of the wheel would be necessary for comfirmation. I'll check against a RS2 comp wheel shortly for you.

[twoqu]

Right, heres the complicated bit!
For some reason the comp wheels are expressed in imperial sizes and the designation such as 2672 for the RS2 comp wheel breaks down as 26 = 2.6 inches and the 72 is the % of the 2.6 figure. So an RS2 wheel has a major diameter of 2.6 inched (@66mm) and a minor of 1.87 inches (@47.5mm).

[4WheelDrifter]

Do you know of a good place to buy an RS2 turbo ? i would like a new one for £600

Look on ebay when no one else is. And make sure it's a real one.



Hey Andy. I did say measure both measure the inducer AND exducer on all the wheels.

And go and wash your hands.

[Sonic]

Awesome

Is anyone able to suggest the differences in terms of performance or spooling characterists based on the info?

[Sonic]

Hey Andy. I did say measure both measure the inducer AND exducer on all the wheels.

And go and wash your hands.

Bloody hell, its nerve racking enough taking it off!

And those are Rich's hands - he'd been working on a diesel vauxhall thing.

[twoqu]

Awesome

Is anyone able to suggest the differences in terms of performance or spooling characterists based on the info?

Without kowing the exact spec of the hybrid its difficult to speculate. However if you take into account the size of the turbine is going to be a limiting factor and that tuners based their small RS2 hybrid around that, then it is only going to be suitable for around the stock RS2 figures. I guess it was an attempt to go halfway between the stock K24 and the genuine RS2 using more readily available (cheaper) components than the more exotic ones used on the RS and deal with what was perceived as lag!
If you want RS2 like performance then use the RS2 one which at least has a little headroom for improvement.

[Costash]

This turbo is used By SMS in 93 ur s4 how deliver 303hp.I gues this is whay is not a genuine rs2 and you are right about it .So then which is the limit in this turbo ? What is the max safe output and how many hp ?

[S2central.net]

As I said to you privately Costash - the only application of that turbo (or bits of it) was on a Lancia Integrale application, but I don't have any clue on the sizes of wheels inside it. You would have to take it apart somewhat to learn more, but if SMS chose it then its gonna be OK... Not as much headroom as RS2 in the high end but probably a halfway hybrid between its lil K24 brother.

[Costash]

Then what is the half way ?How far can I go with it?

[S2central.net]

Then what is the half way ?How far can I go with it?

Impossible to say until the internals are known... Try the Lancia forums - somebody might have stripped one and documented it.

Or some place like AET might have the factory data - if indeed that turbo came straight as Lancia spec thru SMS and onto your car. The internals could be different.

HAve you tried contacting SMS yet - its a long shot, but being German based I bet they keep records that far back of specifications etc

[Costash]

I email them but so far no answers. I try to find something in german forums about my turbo and they said is an k26 , and this is all I find yet.In my opinion if with k24 with ecu tuning you gain 50 hp then with k26 I can go close to 350 but with rs2 injectors and upgraded fuel pump.