[PLF69]

Originally Posted by SeanWRT

Meth will not help at all, if anything it makes engine hotter, because octane improves and IAT decreases so engine keeps pushing.

I myself did track on similar condition a few times, bigger turbo or stock. I believe the humidity was even higher in my area and heat index (feels like) is 122+F. There was no heat soak (oil, coolant, IAT) issue whatsoever, the needle stayed dead in the middle however hard I pushed. Only thing my brake was hot like hell, you can hardly stand near to it even after a cooling lap...

The key is to keep engine cool - you need 1) less boost 2) less back pressure 3) higher timing ignition (it helps ETG).

I also suspect Dinan intercooler can be part of the root cause. I have no doubt it cools IAT well thanks to the dual core design. But it's exactly the dual core that 'block' the moving air going thru them. The Radiator behind the intercooler gets less cooling air as a result.

I trust your opinion, you have much more M2 track expérience than a lot around here.

I still think a custom tune that keeps Boost/timing inside parameters that are controllable by the OP's cooling setup could work.