BoostedH23a1

i have a h23 prelude got some dsm 450cc injectors what will i need to run them with. i am running 7-8 psi

98civicEX

fpr, and or s-afc/vafc

ceemarun

you cant just run 450's and a fpr. you gotta get a vafc or a standalone to run that. no stock honda ecu can idle 450s.

Turbo_Si

resistor box and an afc.

ion_four

my car runs perfectly smooth with 450's and an adjustable fpr. that's all. It is certainly runnin a bit rich, but really isn't too bad. just to share.

Dutchie

Do you have a pressure guage? What regulator do you have? Just curious what your fuel pressure is and how you got it that low.

Hybrid

any more info on this?

So I guess just a plain FMU ain't going to help run 450cc's

98civicEX

ran mine that way to, 31psi, ran like a champ...idle was a lil rough....a lil, but once the gas pedal was on it ran fine

ion_four

To tell the truth...my crappy NOS fuel gauge never worked right, so I took it off, since the face filled up with fuel...anyway, I'm using a Command-flo regulator, so it only goes down to 25psi and that's what I'm at. I was running it one turn it, which should be 30-35psi, but after driving that for a week, I noticed my bumper was gettin a might grubby from running a little rich (as the A/F meter said).