MRS3 engine overheating

[turbojet]

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!!!!

[Phemon]

Check your calorstat.

[turbojet]

Check your calorstat.

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

[Phemon]

does your fan turn on?

[Phemon]

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

[turbojet]

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

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

[bencorsica]

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

[turbojet]

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

I will wait, it will be the next to improve

[rom50]

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?