I have a stock 3litre CRD 2014 Y61.

I've got a dawse & needle valve mod, EGR block and so on.

A few years ago up in Alice Springs, mid 30's and the GU was real sluggish, I put it down to the hot air as everything improved once the weather cooled down. So I'm guessing I was running out of cool air?????

A few years ago I fitted a fan under the IC, but haven't really driven it in hot weather since fitting it, so haven't been able to test it's effectiveness.

I'm wondering, how much benefit is noticeable from fitting a larger intercooler, is it worth the extra money????