Volvo K24 turbo in audi application.

[andy10v]

Good to see this on here, I have been following it on motorgeek, look forward to seeing the results.

[Thuppu]

Quite interesting thread. Nice to get more easy "plug and play" upgrade options for I5 setups. Hope the performance would be competitive also. Waiting to see the dyno results.

[Ruffiano]

Also there are two versions of this cold side, the earlier years had a vband connection, later years have the style posted in this thread.





Here is a shot of the compressor wheel, this is comparing it to different volvo turbo


Here is some info about the Compressor wheel and the turbine wheel sizes:

Compressor Wheel:
O.D. – 62mm / inducer – 45.8mm / ETT (Extended Tip Technology)
Turbine Wheel:
O.D. – 59mm / exducer – 50mm / tip – 9mm / 5.4mm stub shaft dia.
TH:
6²cm area / set pressure – 7 bar @ 7mm lift

[Ruffiano]

Here is a better photo to show the modifications made to the cold side of the turbo, you can see the block off plate for the internal BPV and also that the outlet was shortened to have the output in the stock Audi outlet location.

[istoo]

Nice thinking, i cant see why the turbos wouldnt have improved with 10 years more technology put into them tbh.
Necessity is the mother of all invention and you may make a profit from this!

Great work and good out of the box thinking.

[Billman]

Compressor impeller seems more updated than the RS2 one (larger blades ect)

[als2]

Like your thinking my friend! I know there's a lot to be said for tried and tested and to be honest that's why alot of us are on this forum to gleen alot of experience from others.
But.........its good to think differently now and then, think a tad laterally and see what happens!
Look forward to see how it turns out buddy!

AL

[Ruffiano]

Oh i was just going to mention, the nice thing about this type of swap is that you don't have to change your exhaust manifold, downpipe, or oil/water lines, it is a plug and play turbo like the rs2, however it is 15 years newer, readily available and a fraction of the cost... now lets hope that it is more powerful too!

[Ruffiano]

Ok so the turbo is from a 2002+ Volvo S60 R or S70 R. State side this turbo is a very affordable turbo used. I just purchased one for 150 USD, which as you can see in the pictures is in very good shape and has ZERO Shaft play. Its cost is what made me curious. I sold my used RS2 turbo for 800 USD. I used the hotside from a K26 that i had lying around.

the stock Volvo turbo has an internal wastegate along with an internal BPV, by swapping the hotside, you eliminate the internal wastegate. I actually really liked the bpv that was built in however it doesn't quite stand up to the levels of boost this turbo will see. There is an aftermarket bpv that fits in this turbo but again it is only rated to about 20 psi.

I regestered on some of the "R" volvo forums and poked around and asked some questions. the biggest problem they have isn't actually the turbo's limitations but the limitations of the blocks. these turbos are mounted to aluminum 2.5 liter engines. the problem they have is that the cylinder walls are too thin and the block kills itself over the 400 awhp mark. there was a german member on there running this turbo but he had his on the 2.4 liter block and was making over 500 awhp on his daily driver.

Now in my mind, this turbo should actually spool up faster then the rs2, it has a slightly smaller exhaust wheel, and a larger compressor. Also comparing to what the volvo guys are running in terms of PSI, stock is 12-14, most of thier "stage 3" kits only run it up to about 20-21, I'm interested in seeing how it likes 25+

as long as I am able to reassemble everything this week, it will go to vegas on friday and be dyno tuned by our good friend from EFI Express, Marc. then I think we will have more to discuss.

[GazzaG60]

you would need really to swap the housings if possible.

alternative is to weld up the gate and run external. or run the internal. makes no difference on piddly turbos

[Billman]

Yes i would also like to know in what Volvo was this turbo and what are the compressor and turbine impeller spec? Diameter ect.

[jorge s2]

very nice , waiting to see the resultes whit the engine running , from what volvo is that turbo ????

[Rusty]

Internal WG withy actuator diaphragm. What was required to convert to external WG as per tha later pics, a new housing?

Perhaps this is comparable to the K27s that some fit?

[S2central.net]

That is some old school boost control going on there - is that just a temporary thing ?

[Jamo]

In Estonian Audiclub I had a small discussion about this turbo, and i'm still not sure if Volvo's turbo is better than RS2 unit. Waiting for the dyno.
Logically the Volvo's K24 should start producing boost later than RS2 turbo, but also it should be more capable on the top end compared to RS2. I sourced 2 Graphs on these turbos, but the Volvos engine is 300cc larger than 20vT.

Volvo produces 340Hp and Rs2 350Hp. Just by looking that the RS2 Unit should be better. But torque graph from Volvo show's it beeing flat and not a curve like RS2, witch means there is some boost&torque reserve in that turbo. Is the curve like that because weak internals in the engine -> limiting the boost pressure? And if that is the case, would the Volvo's K24 outperform RS2 unit on Audi engine?

Are my thoughts heading in the right direction or am I far off the mark?

Volvo:


RS2:

luvmyS4, Volvo S60 R[/QUOTE]
What catches my eye most is the power stops just after 6k rpm and starts to drop I wonder if the turbo on the audi i5 will work with the 7200-7400 redline?