Fuel Pressure Question

[ninety15.0]

Hey guys...I just recently tossed a set of milled gt-40's on my 306 with 24# inj and a 75mm Pro-m MAF. The current compression is just a tad over 9.5 : 1 and my mods are included in my sig. My question is what should i be setting my fuel pressure and timing at? I put the car on a 5 gas analyzer and my A/F ratio at idle was 12.7 and everything else was real good. I dont have a wideband and you can't take the 5 gas in the car while driving so i dont know any A/F ratios when the motor is loaded up. It seems like it is running a little rich (a tad boggy when you get on it at lower RPM). The timing right now is at 14* and the FP is at ~39-40 vac off. My suspiction is that the 24's are just a tad too big but i wouldnt want to risk anything with the 19's. Should i turn down the fuel pressure to compensate for the added flow? I ran 16-17* timing on the old setup with the e7's...no detonation what so ever....i guess the motor liked timing. Should i bump it back up to 16 with the new combo and perhaps drop the FP down to 37-38 vac off to try and lean it out a tad?! How much compensation will the 'puter make in pulsewidth and duration? thanks
-Nick

 

[ninety15.0]

ttt

 

[Topdowncruise]

My setup is not that much different than yours.I think my FP is at 41 and my timing is 14.5.My compression is also at about 9.5 because of the pistons I installed so that's why I don't run my timing higher.You could get away with 19lb injectors with the fuel pressure turned up but the 24's aren't likely hurting anything.