I think a lot of the problem is how the boost comes in, whether you're running a small or large turbo to be honest....it's amazing the difference a well mapped car can drive compared to one of the same power but mapped differently. 300bhp+ is always going to be hard work to put down easily in an rs turbo, does depend what you want the car for (track/road/qtr mile etc etc) as to how you want your power delivery. My old engine at 250bhp was nothing like as bad as the majority of people thought it would be with regards wheelspinning, did depend how you drove it as to how it put the power down though. My new engine when i put a bigger turbo on it should be up round 300 so will just have to see what happpens and make alteration and improvements as i see necessary.