Anyone got a compressor map of the RS2 System from the Lancia Delta 844? - Alfa Romeo Forum
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(Post Link) post #1 of 11 Old 16-03-15 Thread Starter
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Anyone got a compressor map of the RS2 System from the Lancia Delta 844?

Hello Guys,

the title says all.

I'd like to raise boost on the 2nd Stage Turbo - refering to BorgWarner it's a K16 unit.
However without a compressor map it's pretty much trial and error and i'd like to reduce the error (failure) rate as much as possible. (Z19DTR == Saab TTiD) - right now runs 1,8 Bar Boost Pressure on 4000RPM and 1,6 at 4600.

all i know is:
the BMW 125d, alsow using an RS2 Setup, runs aparently 2 Bar Boost (3Bar Absolut) on the Big Turbo. But BorgWarner Refers to this turbo as K04 so it is most likely not the same.

I am however a total noob of BorgWarner Turbo Systems, i know the Garrett names but the BW stuff is total black magic for me.

can anyone enlighten me (a little?)

EDIT:

just found this picture and a text passage to it:

6 Blades and 43mm Inducer.....


Selling a Brembo Upgrade for 156's, Project Mu Pads (New) and fitting brake lines (new).

link to the thread

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I will measure the turbo tommorow for you as I have one.

I know the compressor is a little bit bigger than one of a GTB2056v, so 2 bar relative up to 4000-4500 rpm shouldn't be an issue.
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there are a few listed here
Big Collection of Compressor Maps
and the kkk rs2 is listed here whats shown.
Attachment 474953
no idea if this is correct or if its for your model /age .
might be of use though.

Last edited by sussexa; 02-12-15 at 20:08.
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(Post Link) post #4 of 11 Old 21-03-15 Thread Starter
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Quote:
Originally Posted by JS JTD View Post
I will measure the turbo tommorow for you as I have one.

I know the compressor is a little bit bigger than one of a GTB2056v, so 2 bar relative up to 4000-4500 rpm shouldn't be an issue.

Hello,

don't tell me you got it of Ebay for 86€...?

Anyway looking forward to the measurements.

best regards
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Originally Posted by Black-Sheep View Post
Hello,

don't tell me you got it of Ebay for 86€...?

Anyway looking forward to the measurements.

best regards
No, I got this unit from Jarkko.
It has a billet 58/39 compressor.
So based on the dimensions: a little less max. flow, but higher pressure ratio capability than a GTB2056v comp wheel.

It's for sale btw.
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Hello,

So what do you think would be possible boost wise?
I guess it wont support high flow on high rpm (anything past 4500?).

Best regards
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Originally Posted by Black-Sheep View Post
Hello,

So what do you think would be possible boost wise?
I guess it wont support high flow on high rpm (anything past 4500?).

Best regards
If you want to be save, just increase the boost with 100 mbar at the time and watch airmass, IAT and VNT. If the last two are increasing too much step down.
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Thanks for your help

Car is running 1.9 bar boost and we might came to a dead end. Because of the dpf a high afr is mandatory... if i understand right increasesing boost 0.1 bar will not add much more air to the engine to allow more fuel, it would raise afr a little more i guess.

Can more boost / air with the same amout of fuel increase performace? I wouldn't mind trying 2.1(step by step) if there would be some horses to gain.

Unfortunately the delta is an aerodynamic desaster .... above 170kph you realy need plenty of power to improve acceleration.

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Increasing airmass will only improve output if A/F is too low.
In fact it also reduces power because of more closed turbine vanes/ increased backpressure.
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Hey js,

This is a wastegate turbine, no vanees.

In other words there is nothing to gain if afr is already high.
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Hey js,

This is a wastegate turbine, no vanees.

In other words there is nothing to gain if afr is already high.
Oops, you're right, it's indeed a wastegate turbo.

But yes, if the AFR is already high then you need more fuel to make more power.
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