Fuel Injection for '70 Challenger with 440/512

[Spartan040]

I'm currently planning and pricing out a 1970 Dodge Challenger pro touring / resto mod build, and I'm planning on using a 440/512 stroker, I want it to be fuel injected. I'm really looking to buy a pre-built system, like an Edelbrock Pro Flo XT or something like it. I believe that system has an airflow of 1000 or 1100 CFM, and is available with 44 lb/hour injectors, rating it up to 650 horsepower. That's just about my goal for this build. My question is, do any of you have any experience with this system? Was it hard to install, how did you like it, what cold air intake system did you use, is it reliable and easy to tune, is there anything that would work better? Any necessary modifications? If I want more horsepower in future, can I get bigger injectors, or even a bigger throttle body for more air flow?

Also, what fuel tank, pump and lines should I use for a fuel injection system like this?

[67vertman]

here is the system I use.

The system is two parts, one from F&B throttle bodies http://www.fbthrottlebodies.com/ Mine use a Eldbrock 6 pac manifold and three to barrel throttle bodies.  the second from FAST http://www.fuelairspark.com/ which controls the system. Plus you will need some additional items such as, fuel pump (electrical), fuel return line,  fuel regulator, distributor upgrade.

Mine support 550 hp and 550 torque.  Love the system, three years and running great,

[Spartan040]

I should probably clarify, I want a system where I don't have an air cleaner sitting on top of my engine, which is what attracted me to the Pro Flo XT

[Spartan040]

here is the system I use.

The system is two parts, one from F&B throttle bodies http://www.fbthrottlebodies.com/ Mine use a Eldbrock 6 pac manifold and three to barrel throttle bodies.  the second from FAST http://www.fuelairspark.com/ which controls the system. Plus you will need some additional items such as, fuel pump (electrical), fuel return line,  fuel regulator, distributor upgrade.

Mine support 550 hp and 550 torque.  Love the system, three years and running great,

I'll keep that in mind. Kick ass 'Cuda you've got by the way 

[Spartan040]

I like the look of that system, how much would it cost to have it support 650-700 horsepower? Can I run a K&N cold air intake with it?

[74BlueFish]

Pro flo xt  with megasquirt, coil near plug, fuel pump in gas tank
Haven't started it yet.   Not sure if rally hood will clear intake.

[YellowThumper]

Pro flo xt  with megasquirt, coil near plug, fuel pump in gas tank
Haven't started it yet.   Not sure if rally hood will clear.

Is that a model 302/351 cam sensor replacing the dizzy?

[74BlueFish]

I bought a Dorman 689-200 cam sensor ,  it is from a jeep   not sure if same to the one you mentioned.

[Spartan040]

Pro flo xt  with megasquirt, coil near plug, fuel pump in gas tank
Haven't started it yet.   Not sure if rally hood will clear intake.

Looks good, what injectors are you using? 44 lb/hour? Also, what air intake system are you going to use?

[74BlueFish]

Bosch 52 lb/hr .      Haven't bought the air intake yet but thinking of running the tube to the pass side of car to a K&N round filter.    Not sure if I can go to drivers side where battery was because of the AC compressor.  Battery in trunk.

[Spartan040]

Bosch 52 lb/hr .      Haven't bought the air intake yet but thinking of running the tube to the pass side of car to a K&N round filter.    Not sure if I can go to drivers side where battery was because of the AC compressor.  Battery in trunk.

What's the max horsepower rating with those injectors and the 90mm throttle body? And that sounds like a good idea, although I saw one guy on this forum with the same setup who managed to do a dual cold air intake, one passenger and one driver side

[74BlueFish]

For 52lb/hr injectors, The fuel calculator says 665 hp at flywheel at 80% duty cycle.
830 hp at flywheel at 100% duty cycle.
   

[edl94]

You could do it like this. Holley street dominator  drilled and injector bungs welded in. Edelbrock fuel rails and EFI elbow. Choose the controller throttle body, and injector size and you are in busniness. This fits under the hood.

[Spartan040]

For 52lb/hr injectors, The fuel calculator says 665 hp at flywheel at 80% duty cycle.
830 hp at flywheel at 100% duty cycle.
   

Forgive my ignorance, I'm still a bit new to all this. Duty cycle?

[1 Wild R/T]

Forgive my ignorance, I'm still a bit new to all this. Duty cycle?

On time for the injestors.. 100% duty cycle means the injectors are maxed out & not really capable of supporting the engines needs.. Typically you want to max out around 75-80%