Fuel delivery moogly-goo

[Ninjamouse]

Hey, Guys. After years of looking I finally pulled the trigger on a '69 Ranger SWB. I sold my '66 Fairlane 500XL to do it and I couldn't be happier. Well...that is if the fuel system was done right.

I'm not saying the fellow that had the truck before didn't work hard at getting it where it is now, but it just isn't right. Here's the deal...He swapped the engine with a '91 302 and converted that to carb fed. He went with a 2BBL intake and a motorcraft 2150. Nothing wrong with that, as I am old and don't mind not burning tires.

The conversion involves a cheap electric fuel pump, no regulator or return. The truck does fine whilst driving, it's the idle and take-off that the issue It idles rough and the take-off is like a hair trigger...chirps the tires almost every time. I'm convinced that the way to go is to go back with a mechanical fuel pump, but...TBH, I don't have it in me right now. I'm looking at rebuilding the carb, swapping the el cheapo fuel pump with a self regulated Carter P4070 pump and install a fuel pressure gauge.

Here's where it gets fuzzy for me...the return line. I've never done it...do I need it, or can I even do it with my stock behind-the-seat tank? Anywho...I figure this is the place to ask

[Ranchero50]

Fuel pump just fills the bowl on the carb and has absolutely nothing to do with performance as long as the float is maintaining the level correctly. Chirps tires sounds like the pedal / linkage geometry isn't correct.

Look into the accelerator linkage as well to help with the drive-ability issues. Stumble sounds like it isn't squirting correctly. (too much or too little).

A return line system on a carb works well when you need a huge amount of fuel flow off the line (think Pro-Stock). Having the fluid in motion helps it flow into the carb faster vs a dead headed fluid in the lines like a standard setup. Way overkill for a 2150.

[Ninjamouse]

Ah...he would have had to monkey with the linkage. I'll look at that. Glad to hear about the return line too. Thanks

[69Ford]

As for chirping the tires did the PO change the gear ratio in the rear end. Mine was changed to a lower gear ratio and always chirped the tires. Put the original gears back in. Fine now and doesn't over rev at highway speeds.