Quote:
Originally Posted by falcon_wizard
Thanks for the feedback, I've just ordered the JR dual cooler and will be able give feedback on how it performs after its installed, but based of the feedback here, I suspect it will be exactly what I need. My Turbo setup puts up to 340hp, if it can bring oil down from 280F down to 240F or less, It'll be just fine for my 5W40 oil.
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So I promised I would provide some feedback once the Jackson Dual Cooler was installed.
Initial comparison logs seems very promising. While Oil temp could easily reach 280 degF when driving at high revs before, during a first test with the Dual Oil Cooler, the Highest Oil Temp I reached was 235 degF.
During each test, the engine was maintained largely above 4000 RPM for about a 20min period. Running the engine constantly at 4000 RPM or higher is really where I found an oil cooler to be a must, where Temp would reach 260F very fast (3-4 mins) and up to 280F. Otherwise, in "normal high load" conditions with this turbo set-up, I found the stock cooling system could still be sufficient with the 5W40 Oil I use, where Oil Temp would go up in the 240-250F range but not really beyond that, so not really scary with 5w40, but probably borderline for 0W20. With the Dual Cooler, it seems it will be able to keep my oil under 240F even in worst case conditions and benefit from faster warm up time as well from a cold start or winter, which is great.
It also warms up faster to operating temp (anecdotally about 5 mins versus 9 mins), and since the oil does not go as high, brings it back to normal operating temp much faster after RPM is reduced. Water Temp did not exceed 212F with the Dual cooler, where previously it went typically to 212F and up to 215F worst case. So Adding the Oil Cooler does not seem to be detrimental to Water Temp, with the larger Radiator.
An interesting tidbit is that Oil Temp seems to be mainly a factor of the RPM over time. The Test 2 with the stock cooling system was under higher load than Test 1, but both seemed to influence Oil Temp about the same way when looking at the RPM & time.
In test 1, it took over 13 mins to bring the oil back down from 276F to 220F. With the Dual Cooler, in 5 mins the oil was back down from 230F to 210F.
This is precisely what I was looking for...
Cheers