I use mines on the road and I'm around 500hp however I have my boost off most of the time which is somewhere in the region of 370-380hp and it's fine, on my high setting traction does break all the way through to 4th gear.
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BUT currently my geometry is way out and suspension isn't set up properly which doesn't help, and my tyres are normal road tyres, the rears having around 2mm tread left so that doesn't help either!
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I've got semi slicks to go on and from everything I've read they are a must on the road at that sort of power!
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There will be a few different types of 500hp, my boost comes on late
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(starts around 4200rpm) as the turbo is quite big, but I'm willing to sacrifice that as i do plan on more power and taking it to the drag strip next year, sounds like what you are after is quicker spool
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You can always have a couple of boost settings and an off boost option so just because you have 500hp doesn't mean you need to use it
![Wink :wink:](./images/smilies/icon_wink.gif)