Originally Posted by Cmike2780

Does this work?

Assuming 332hp @the crank & 275hp baseline @the wheels.

332 bhp x Y (whp gain)/275 whp= X (bhp gain)

Example 1:
20 whp gain

332 bhp x 20whp/275 whp= 24.15 bhp gain
Total bhp @ crank: 356.15 bhp

Example 2:
5 whp gain

332 bhp x 5whp/275 whp= 6.04 bhp gain
Total bhp @crank: 338.04 bhp