Quote:
Originally Posted by HDi fun  I would say it will certainly be hotter.
My 406 HDi 2.2 was remapped to 192bhp. It already had an oil cooler fitted as standard and the oil temperature was definitely about 15 degrees higher when driven purposefully than it was before the remap. (The car had a factory standard oil temp gauge).
This is to be expected because the turbo is handling larger volumes of hotter exhaust gas.
In addition to looking at the oils grade, you need something which is going to remain stable under these inflated temperatures. Ester based synthetics perform this job superbly and will not break down significantly when thermally stressed.
Something else you really mus do is let the car idle down for a couple of minutes before powering off the engine. This allows the tubo bearings to cool (their only source of cooling is the circulating engine oil).
Guy and Tim will give you the very best of advice on the oil thread. |
about the " idle down for a couple of minutes before powering off the engine" i've allways done.... call me freak if you want (lol) but i never turn it off straight away,and when cold i never engage 1st gear till coolant temp is above 40 degrees celsius and and i drive it like a old men untill i am sure all oil and water temperatures are "normal".
now stay with me and correct me if i am wrong or any other pointings would be apreciated ...
1.egr is working as it should , "deleting" the egr will increase the combustion temperature. i havent done that to avoid the temp. increase inside the combustion chamber. cleaning it within reasonable mileage intervals is my plan.
2.the turbo compressor housing was changed from 49 to 52 . now the turbo "breathes" better and more, maintaining the choke limit further away. i was doing 22 psi " manifold absolute pressure" when the stock turbo should only do 18 psi (without remap was doing 13psi i think). the upgraded version will be able to work at 26psi altough i wont use that amout of pressure. making the turbo work on its choke limit will make the compressed air alot hoter and less dense , killing the turbo after a while and instead of gaining power we loose it.
resuming , it will run cooler blowing cooler air to the engine keeping temp. down.
3. back pressure should be alot less also (straight exhaust system), so exhaust temp. at the turbo discharge turbine will be not as high as expected on a normal exhaust system.
4. intercooler... well if its a good airflow/non restrictive cooler it will help on the pressure losses from turbo to manifold (turbo wont need to work as hard to compensate) and cooling the compressed air even more comparing to the stock one.
i think all this factors are related and it will work as a vicious cycle.
head hake now... oing for coffee and cigarrete
castrol edge ow30 fst 
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