I was wondering what typical Horsepower to weight ratio's are in GT1.

I know displacement is based on vehicle weight and trying to get an idea of how much Horsepower a 2600 pound car would need to be competitive.

Also if anyone knows the typical Horsepower a GT1 engine makes would be helpful.

Are there any links to GT1 engine builds I can use as a reference or as an example?

Thanks

Adam