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first let me just say I’m an electrician by trade not a mechanic I’ve done what I can do to the truck but some of abilities are very limited.
1 hour of driving managed to suck down 50 litres of fuel, motor has a new Holley 94 carb, new fuel pump, new push rod, new spark plugs & wires, petronix point eliminator, new distributor cap, all new wiring, new 40,000VDC coil from petronix (flamethrower)
now, I did check the vac advance and it does it fact move with me sucking on the ridged line, I think I may have a timing issue and this is wheee my knowledge ends. If you look at the picture you can see where my distributor is positioned, using the vac advance diaphragm as a guild.
50 liters in an hour is way more than normal. Flatheads without overdrive in my experience get between 12 and 18 miles per gallon. If you got 12 miles per gallon at a steady 50 miles per hour you would burn about 15 liters. I'd check for a fuel leak, I can't see a flathead continuing to run while getting low single digit fuel mileage.
13 gallons (US) in an hour?! I don't think a flathead could possibly combust that much. Check your oil to see if it has gas in it.
Your timing might be a little too advanced but with a Pertronix it could be fine. Only way to tell is to check it with a timing light.
(You beat me to it, Fred!)
50 liters in an hour is way more than normal. Flatheads without overdrive in my experience get between 12 and 18 miles per gallon. If you got 12 miles per gallon at a steady 50 miles per hour you would burn about 15 liters. I'd check for a fuel leak, I can't see a flathead continuing to run while getting low single digit fuel mileage.
Agreed.
No fuel leak that I can see, I will also mention that I have the new carb air/fuel mixture set at about 2 turns out from fully closed, I also used propane as a jetting guild while the truck was idling opening the propane bottle over the intake of the carb to see if the idle increased or decreased. Currently no change in idle with propane.
Exhaust doesn’t smell rich what so ever, exhaust is brand new, I believe 1 1/4” straight pipes to what looks to be red painted cherry bomb glass packs then directly out the back. Idle is so smooth no roughness absolutely no hesitation or lack of power, pulls strong. Previous owner put new rings and rod bearings in and cleaned the internals. I’m running full synthetic 10W-30 Mobile 1 oil, 89 Octane fuel.
13 gallons (US) in an hour?! I don't think a flathead could possibly combust that much. Check your oil to see if it has gas in it.
Your timing might be a little too advanced but with a Pertronix it could be fine. Only way to tell is to check it with a timing light.
(You beat me to it, Fred!)
ok this is where my knowledge is limited, I’ll have to do some research on how to time a flathead, I did read somewhere 14 degrees advanced is where I need to be?
ok this is where my knowledge is limited, I’ll have to do some research on how to time a flathead, I did read somewhere 14 degrees advanced is where I need to be?
No, that would be too much by far. Disconnect and plug the vacuum line from the carburetor, at the distributor. Set the timing so the pointer on the timing cover aligns with the "Bump" on the crank pulley. That sets timing to the correct 3°. Done!
It sounds like you power valve in the carburetor is ruptured, a common occurrence.
(Ignore the notes below about two pointers, your engine only has one)
No, that would be too much by far. Disconnect and plug the vacuum line from the carburetor, at the distributor. Set the timing so the pointer on the timing cover aligns with the "Bump" on the crank pulley. That sets timing to the correct 3°. Done!
It sounds like you power valve in the carburetor is ruptured, a common occurrence.
(Ignore the notes below about two pointers, your engine only has one)
Thank you for that!!
I’m assuming I can’t just loosen the belt and move the damper to align with the Bump, but rather need to use a timing gun and move the distributor cap? Sorry I don’t have much knowledge here.
Use a timing light, rotate the distributor to align the pointer with the bump at idle.
It sounds like you don't have a factory manual? I highly suggest you get the 48-51 manual with 52 supplement, Faxon Auto Literature sells them on CD for very little, or you can download a copy here: https://www.factoryrepairmanuals.com/ford-downloads/
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