QUOTE(bbrock @ Oct 6 2021, 08:24 PM)
QUOTE(9146C @ Oct 4 2021, 12:48 PM)
From the "I should've known better" archives...
When I re-assembled my car, I relocated the fuel pump to the steering rack area. Not thinking this through clearly, it turns out that after a few months, the fuel lines have "softened up" just enough.
Last Thursday night, I thought I'd go for an evening drive...got about 2-3 miles from home and the car died...no fuel to the carbs.
Turns out the suction side of the pump was "collapsing" the Gates fuel line and starving the pump.
Just thinking out loud here, but the suction side of the pump collapsing the hose suggests blockage somewhere in the supply line. How old is the strainer sock in the tank?
Brent: Thanks for the feedback...and a very good thought! The internal strainer was also replaced when I rebuilt the car (within the last 6 months). The fuel tank was very clean when I pulled/inspected it.
In the top photo I posted, you can see where the suction hose was collapsing/kinking on the bend near the top of the photo.
I'm thinking that the aftermarket fuel pump I installed may be a little oversized at 15 gph max capacity. Doing some ballpark calculations, it looks like pump capacity needs to be theoretically about 4-5 gph (without recirculation).
Assumptions:
- 20 mpg fuel consumption
- 16 gallon fuel capacity
Assuming a speed rate of 80 mph, the tank would have a theoretical 4 hour capacity ((20 x 16)/80).
Therefore, "burning" 16 gallons in 4 hours would be a 4 gph fuel consumption rate.
(Even if fuel economy is only 15 mpg, rate would only increase to 5 gph.)
There was a previous comment also about the number of hose clamps in the second photo...I did double up on the pressure side. Psychological peace of mind.