Tbh for me it's not all about top speed.
The car gets to 110 comfortably (as long as you don't stay there for long)
So the speed for me is how quick you get up there !!!
Hi Steve . I raced 1300 stockcars and I had the same problem after about three laps it would not accelerate out of the bends. It turned out to be crushed fuel lines.( they were braided)
Just a thought.