iirc JHM was working on something a while back, I recall talking with Dan about it in probably 2010.
should be fairly straightforward on the rs4 since there is already the factory cooler vs say the s4 where the oil never leaves the engine and a mocal plate wont work b/c of the top mounted filter
You have to customize an aftermarket oil cooler from someone like Setrab. There have been a couple guys who have done this in conjunction with deleting their auxillary rad and adding an intake snorkel on the passenger side to increase air intake. Koolade has done this.
My oil cooler is going (leaking connection) and I asked JHM recently about a kit they might have. The reply was vague (even after a clarification email), but they said they only have one for the S4. I think it is what is used in their SC kit. Like I said, 3 emails and their answer still didn’t make sense to me.
I know Mick and Blake have done this. Pretty sure if you search on QW and/or AZ you can find some info. It isn’t an off the shelf solution, with the fittings, etc. But as someone else said, they deleted aux radiator and upgraded oil cooler with a Setrab unit. On Mick’s car, it definitely kept the max temps down, and the recovery time was much shorter.
As others have said, two of us have upgraded to a larger setrab unit. However, I still believe the key to lower oil temps on the RS4 lies in fabricating a block-off plate for the oil cooler block on the side of the motor. I’ve documented the oil flow through the areas in question. This will allow your factory oil cooler to be used 100% of the time vs. the oil block (that’s cooled by your coolant). I sourced an extra oil block from CKS, sent it off to have a plate made, but haven’t heard anything since. I still bug him from time to time to get one cut, as it’s a really easy part to make…someone just needs to move forward with it…
With air-cooled P-cars, you only have so much surface area up front for the oil coolers, and they’re usually using all that area, hence finding ways to increase heat-transfer. In our situation, it’s a mechanical issue where oil is bypassing the oil cooler altogether under high RPM… Because there are two paths the oil can take, it’s taking the path of least resistance.
Block-off plate didn’t appear to do anything for oil temps above 7k rpm. I just picked up the last fitting I needed to connect an oil pressure gauge to the car and start gathering more data. I’m still running a huge setrab oil cooler. Not really any further into finding a solution other than just continuing to eliminate variables.
Block-off plate didn’t appear to do anything for oil temps above 7k rpm. I just picked up the last fitting I needed to connect an oil pressure gauge to the car and start gathering more data. I’m still running a huge setrab oil cooler. Not really any further into finding a solution other than just continuing to eliminate variables.