Which injectors?
- Thread starter 1990LXDropTop
- Start date
Michael Yount
Mustang Master
DMAN302
My mom says thanks for the pearl necklace.
Ok cool. The problem is I still have the stock fuel pump. I am eventually going to replace it with a better one, but will probably run it for now. Should I be okay running the stock pump with 24# injectors? I heard the stock pump was good to 300hp. What should I replace it with when the time comes? 255lph walbro?
04sleeper
Founding Member
Funanin
Founding Member
go with the ford motorsport cobra kit that comes with a 93 cobra ECU, 24# injectors, and a 70MM mass air meter. They are all calibrated to work together and with the right combo, they really do make some power. oh yea, the stock fuel pump on 86-89 is 88 lph, the stock on 90-93 is 95 lph, which is no where near enough fuel for a combo like that. I would go with the FMS 190 lph because it is the whole fuel pump contraption not just the pump itself. (alot easier to install and replaces everything surrounding the pump as well)
04sleeper
Founding Member
I agree. The 255 is a good pump and will allow for some future mods.
A Pro-M 80 costs less than the Cobra kit and will yeild much better results.
A Pro-M 80 costs less than the Cobra kit and will yeild much better results.
Funanin said:
I would not reccomend that kit to anyone, the Cobra computer is terrible, pulls timing and is less aggressive then the other factory computers.
I would go 155lph minimum, the 190lph-255lph would be a better choice depending on your future plans. I think I still have a Ford Motorsport 190lph pump with a complete new install kit, less then 5000miles if your interested $75 shipped. Quietest HV pump I have ever had or installed...
Yes the car will run on the stock pump but may run out of volume in the upper rpm range, which is not a good thing....starving it for fuel can cause major issues.
1990LXDropTop said:
If you can do a camswap on your own you certainly can do a pump swap. Its best to do when the tank is low. I use 2 jacks (I always remove/install my gas tank when im alone)One jack to jack the car up and one to support the tank once its loose to lower it and raise it. I woud go straight to a 255 and a new fuel filter while your there. I would also do 30lb injectors toleave more room for growth down the road. I had to swap in 30's because my 24's were too lean even at 300rwhp. Though, im sure if I had my PMS back then I coulda fixed that.
Not sure how to or if you can drain it.
Yes, thats basically how to do it, but its not quite that simple. Getting the entire pump assembly back in is a pain for a first timer. Dropping the tank is simple. Remove the 2 bolts holding the tank straps and then remove the 1 little bolt holding the tank to the filler neck. Thats all you need to unbolt. The pull and wiggle the tank out. You'll need the fuel lien disconnect tools to remove the lines so you can get the tank out from under the car so you can work nice. Cut the old pump wire harness off and splice in the new. Do NOT use any tape or heat shrink on the connections. See how the old filter sock goes on and put the new one on the same way so the pump assembly goes back in easier. You have to get it in and turn it a bit. I believe it only goes in 1 way.
Yes, thats basically how to do it, but its not quite that simple. Getting the entire pump assembly back in is a pain for a first timer. Dropping the tank is simple. Remove the 2 bolts holding the tank straps and then remove the 1 little bolt holding the tank to the filler neck. Thats all you need to unbolt. The pull and wiggle the tank out. You'll need the fuel lien disconnect tools to remove the lines so you can get the tank out from under the car so you can work nice. Cut the old pump wire harness off and splice in the new. Do NOT use any tape or heat shrink on the connections. See how the old filter sock goes on and put the new one on the same way so the pump assembly goes back in easier. You have to get it in and turn it a bit. I believe it only goes in 1 way.
Rick 91gt---I would go 155lph minimum, the 190lph-255lph would be a better choice depending on your future plans. I think I still have a Ford Motorsport 190lph pump with a complete new install kit, less then 5000miles if your interested $75 shipped. Quietest HV pump I have ever had or installed...
I will take that fuel pump if he hasnt spoken for it already.
I will take that fuel pump if he hasnt spoken for it already.
Fivocapri said:
Shoot me your e-mail address [email protected] , I'll go check the shop this morning I have some work to do anyways.
