Put down 512/489 on 13#& 92 octane. Will probabley up the boost into the 15-17 range where the H series is more efficient to get the 550+ I am shooting for. These KB blowers kick ass. Now I need to shop for some new tires .
Thanks,I just ordered the 3" pulley to get the blower into it's efficientcy range.Hoping for another 40-50hp.I got the blower through AFP since they did the install.I picked the heads up from a guy last summer that bought them and decided not to go through with the project.I should have new #s in the next week.