jason, i'm NOT worried about trying to use the stock injectors. i thought i made it clear that i think it's a bad idea. if you need that much more fuel, it's time to call RC Engineering and order some new squirters.

don, i'm saying that if you try to run the walbro pump at 110 psi, it will only flow 946 cc/min. (236 x 4) if the GST guys are upgrading to the walbro pump and running it at these insane pressures, then they are cheating themselves out of fuel too.

there is NOTHING WRONG with the walbro pump. it is plenty adequate for supplying fuel to a turbo'ed 420A. the problem is that asking the pump for 110 psi is expecting too much.

run the walbro at 80 psi and you'll have enough flow for 4 injectors at 678cc/min each. that should be enough, eh?

moral of the story: get new injectors and a S-AFC if you're going to run more than a few pounds of boost.