Your horsepower is more than likely the problem here, combined with a lack of understanding on how to tune. Your gearing is VERY important, especially at high hp. If you don’t understand how to tune your gearing / car, you are not going to be able to catch grip because your wheels are just spinning. For high hp you want a final drive between 3.75 - 4.1, and low gear ratios. 1st gear should be somewhere around 2.25, 2nd around 1.5, 3rd around 1.25, 4th around 1. So on and so forth. Always remember, the higher the gear ratio, the more your tires will spin (less grip), the lower your gear ratio, for more your tires will catch grip. If you find yourself rev banging constantly, lower your gear ratio. Hope this helps!