Injector size with no FMU on stock engine

jd-hart

Member
Jun 29, 2005
124
1
16
Greensboro, NC
I tried searching but I can't find a concrete answer. I am looking into adding a Vortech with 8-10lbs of boost on a stock 1990 Mustang. Only mod is the air silencer is removed. (Haven't even bumped the timing) From reading other posts I would rather not deal with the FMU. I plan on adding a 255 fuel pump with the supercharger.

What size injector do I go with when I delete the FMU. Will deleting the FMU and running bigger injectors cause any idle problems with a dyno tune?

Thanks.....
 
to be safe with no FMU run a 255 intank, an adjustable regulator set it at 40 and run 30 pounders and matching mass. set your timing at 8 degrees and work up to 10 but keep an earout for pinging valves (detonation) if so back it back to 8 and leave it. remember to run good fuel 91 or 93 octane with that blower and run Autolite 23's gapped at .032