hi guys what the pulleys combo for whipple 2.3L to get 18 psi ? Is it safe to run 18psi on 93oct pump gas ? i have 4#,6# lower Rings ,big TB , TF heads,built engine ,and full catback whipple told me lower 4# with 3.125 is 18psi that correct ?
my motor only has 300 miles on new build but im running 8lb lower and 3.375 upper and i havent held truck to see how much boost it makes but if you just slap the loud pedal it jumps to 15lbs instantly. there are other variables that come into effect also