just curious on how far I can take the 450cc injector and 255 walbro pump combination???

 

It should be about 300whp on a stock fpr according to boosted-hybrid forums...

 

man thats good. I plan on using a aftermarket fpr. thanx

 

if you need a little extra help get a 4-6:1 fmu

 

Someone recently made 300whp with a 255-hi pressure pump and dsm's on a stock B18B1. 250whp is more typical with a fpr helping.

 

the fuel pump will probably be the last one you have to buy

 

buy the 255hp

 

i ran DSM 450's on my F23 on a Drag kit running 17psi, i was at 75% duty cycle around 5,500rpms. i also had the 255 High Pressure Walbro fuel pump, i figured, if it ran good on a 12:1 FMU, a mere 70psi at idle wouldn't hurt it. so i did it.......i did it for about a year no problems. 87psi is the max the fuel pressure would see, the walbro on the FMU saw twice that @7psi of boost, around 120psi of fuel pressure.

 

well my deal is trying not the run the fmu. Im getting rid of it and wanting to run the 255,450's, and an aftermarket fuel pressure regulator. So your saying with boost that i need to see about 120ish of fuel pressure???

 

whoa whoa whoa dude, 120psi of fuel pressure is insane, and is caused by the FMU. trying to get rid of that, remember