Forum Megane RS

Hello!!

I am a regular doing trackdays with my mrs3 ready for the circuit. In hot days I have engine overheating problems, for example, the last day of the track at the Circuit de Catalunya (Barcelona) I could'nt do more than 3 laps because the water temperature increased to 115 degrees, in fact, I had to reduce speed.

I would like to know if there are more people with this problem, I have a Stage 1 with decat and Wagner IC, my AFR is about 0.77-0.80 lambda at full throttle. Also I've installed a clio 200 75ºc thermostat with Mocool to aid.

I can think may be normal because in hot days (30-35ºc) the car feels faint but, a friend of mine with very same preparation don't have this problems.

I have to say that I am a mechanic and my car really works perfectly, but I do not know if this "problem" is usual or really the solution is to mount a turbocooler or a big water radiator.

Thanks!!!!

Check your calorstat.

Phemon a écrit:Check your calorstat.

replaced weeks ago by one new open 75ºc (original opens 83ºc) and replaced water by Mocool

does your fan turn on?

otherwise it can come from your big preparation, difficult to say.

Phemon a écrit:otherwise it can come from your big preparation, difficult to say.

maybe... I'm going to have to do tests

I have the same concern as you recently
i changed everything , calorstat, temp probe, i test my cylinder head gasket
everything is ok....
however it is still heating, i will follow the subject it interests me a lot

Megane 3 rs big radiator from Decl concept available again in October

I will wait, it will be the next to improve

Phemon a écrit:does your fan turn on?

I don’t think the fan was the problem because when you drive on a track, your speed is enough to give some cool air for your radiator.

Are you sure your calorstat works well?