FMIC + Boost

[88502]

Does running a fmic or an aftermarket slic allow you to run more boost or is it octane that makes the difference?

Bill (88502)

 

[pacecarta]

cold air requires less octane , cooling the air whether by a larger i/c or alky still has gains , then theres the pressure drop that witha good FMIC cmpared to a stock ic might be as much as 4psi , meaning you dont have to heat the air as much to get the same boost , colder air makes more HP and will require less octane so you can usually turn the boost up , not uncommon to see some pump gas cars with good FMIC able to run near 20psi

heres a good write up

Intercooler Design Discussion
and then read the IC tests of stock vs popular FMICs at the time of the test

Bob Dick IC TESTS