13-04-2015, 04:44 PM
Basically more boost = more air. If you're already running remapped without altering the boost (stage 1) then you've already used all the spare air, you can't have more power without a bit more boost because it will just produce smoke. You probably will get a tiny bit more power from the stage 1 map and an inter cooler because you're burning it more efficiently with a cooler denser charge, but it's not going to make a massive difference until you add more fuel and more boost to burn that fuel.
As a very rough calculation you can make a lineariation of boost pressure vs BHP output, but it's not spot on and it's nowhere near ideal but it seems to be what is being asked of this thread. For example stock boost pressure is 14 psi with 90 BHP, boost for 150 BHP is 20 psi.
This works out roughly 1 psi per 10 BHP of extra fuelling, so if you want to cleanly burn 130 BHP you're going to want around 18 psi of boost. Basically you can't have more power than a stage 1 without increasing the boost as boost pressure = air mass flow = power.
As a very rough calculation you can make a lineariation of boost pressure vs BHP output, but it's not spot on and it's nowhere near ideal but it seems to be what is being asked of this thread. For example stock boost pressure is 14 psi with 90 BHP, boost for 150 BHP is 20 psi.
This works out roughly 1 psi per 10 BHP of extra fuelling, so if you want to cleanly burn 130 BHP you're going to want around 18 psi of boost. Basically you can't have more power than a stage 1 without increasing the boost as boost pressure = air mass flow = power.
