Funny you mention heating up fuel, im running 98 in my R34 and we were doing a bunch of runs setting up the Haltech and we were getting fuelling issues towards the end of the day, we werent losing pressure etc it actually turned out that the surge tank mounted in the boot would have been nearly 50* i reckon it was HOT! So i ended up getting a P/S cooler and hooking that in the return line from the rail to the surge and that made a huge difference on the dyno so i can only imagine with race pace having the extra air over the cooler how much better it would be?