Jase,
Harvey is wise to advise you that, and it is good advice for any injector that is maxed out, as there is not enough margin left in the fuelling to use this to help cool the pistons, and you're still running relatively high compression. What this will mean is that the cylinder temps will gradually build up to the point where det sets in and BOOOOOOOOM .

Obviously you could have the car set up for high speed runs, but this would mean a boost curve that dropped off considerably at high rpm. However, this would require a LIVE map to det check and adjust flat out at Brunters. It can't really be checked on the road (safely), so the advice is good for ANY off the shelf chip.

Greens are 382ish...