Have a 1950 Model 3100 with a 1960 261 in it. Single barrel R carb and with a 4-speed tranny. Engine was redone this summer and have driven only a handful of times so far. Issue is fuel gauge isn't working. I have suspect tank sensor but haven't gotten around to replacing yet. I HAVE though run out of gas once (when I notice gauge was bad), and today a 2nd time.. so time to get all this fixed :-).
Problem is, I was assuming at least 10mpg, but after having put 10 gal in it the first time I was tracking miles each drive to make sure I wouldn't run out again... i.e. should have been good for 100-125 miles or so. I got 72 miles when it ran out the 2nd time.... equating to 7.2 mpg. This seems to be about 1/2 what I would have expected and what I'm reading in various posts and threads. Mechanical pump, no fuel leaking, and no excessive idling or anything, engine runs smooth, good vacuum (tuned for max vac), and RPM low-mid (guess 500-600, haven't tested it yet). No excessive smoking going down the road or sitting idle.
Assuming 7.2 mpg sounds way off... any ideas what could be consuming so much or a better way to gauge consumption ?
Thanks all.
Last edited by Phak1; 09/29/2022 2:25 PM. Reason: Moved and started new thread
