Overhaulin'

custom turbo, how to modify the injection pattern to get more fuel?

i have a 93 Mazda GE626 2litre EFI (this model never ever came with a turbo) I managed to weld custom manifolds and get a small turbo hooked up with around 5pounds boost. Now air is no problem, but since its efi how am i gonna get more fuel in there? Put bigger injectors?? since this is a nice family car and least modified model i dont think i'll ever find a custom computer for this vehicle.. any tips pls??

Public Comments

1. Usually the computer can handle a little more air. If the computer can't it is usually due to the flow being higher than the airflow sensor can handle.
2. the computer will correct for the increased air supply, you might look into a few sensors though. in a NA engine, the computer looks at vacuum to calculate the amount of air needed. when you add a turbo that vacuum disappears and pressure develops. this difference by it self will cause you a head ache. in a 5 psi system i believe that the stock system can handle that much of a change as long as the computer knows what is going on.