[The Convert]

Originally Posted by Cloud9blue

PI wouldn't help much if you don't hit high boost target very often, which is the case for a street car. Most of the carbon build up occurs at idle and load load use, which PI would not spray any fuel to the manifold.

Originally Posted by CeeWhizzle

Yeah, pretty sure those PI kits are made to be tuned to only spray under heavy loads and mid-high boost. No sense having them spray 100% of the time, just to waste extra gas.

False, You decide when to have the supplemental fuel added and can tune the DI around it. If you wanna start spraying at 10-12 psi, you can. Also, a few spirited runs with it only set to spray at 15-20+ psi is going to happen more than just once in a while which will still keep your valves clean. This has already been proven.

[CeeWhizzle]

Originally Posted by The Convert

False, You decide when to have the supplemental fuel added and can tune the DI around it. If you wanna start spraying at 10-12 psi, you can. Also, a few spirited runs with it only set to spray at 15-20+ psi is going to happen more than just once in a while which will still keep your valves clean. This has already been proven.

I wouldn't say it was false. Sure you can run your PI's anytime you want. However, no one will run them 100% of the time. And even anything below 10-12psi would be a waste for street application unless you have a map specifically for anything lower for the added power for racing applications (if you're into that kind of stuff).