jebB Posted December 11, 2023 Share Posted December 11, 2023 What the best ignition timing degree for a 707c running on pump gas Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/ Share on other sites More sharing options...
mowerman Posted December 12, 2023 Share Posted December 12, 2023 Surprised you haven’t got an answer yet. Lots of guys on here know … bob Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-543330 Share on other sites More sharing options...
mechohaulic Posted December 12, 2023 Share Posted December 12, 2023 2 hours ago, mowerman said: Surprised you haven’t got an answer yet. Lots of guys on here know … bob just when I think I'm maxed out on what I forgot= a post like this shows up. books are gone so is memory banks, have been there done that situation can't remember the numbers . Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-543341 Share on other sites More sharing options...
mowerman Posted December 13, 2023 Share Posted December 13, 2023 I’ve got three big manuals that cover everything. It probably has it in there. If this guy hasn’t got the information by Saturday I’ll run out there and take a look complete…. Bob 1 Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-543395 Share on other sites More sharing options...
Popular Post HarryS Posted December 13, 2023 Popular Post Share Posted December 13, 2023 I found an old B Model operation manual for gas powered trucks. It calls for 10* BTC with 91 octane gas. That was when gas was gas with lead and without alcohol. The closest thing in today's gas would be non ethanol with the same octane rating if you can find it. Probably have to experiment from that point. 3 Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-543402 Share on other sites More sharing options...
terry Posted December 13, 2023 Share Posted December 13, 2023 7 hours ago, HarryS said: I found an old B Model operation manual for gas powered trucks. It calls for 10* BTC with 91 octane gas. That was when gas was gas with lead and without alcohol. The closest thing in today's gas would be non ethanol with the same octane rating if you can find it. Probably have to experiment from that point. Are you supposed to put harder valve seats in an older engine with the unleaded gas now? Terry Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-543434 Share on other sites More sharing options...
mattb73lt Posted December 13, 2023 Share Posted December 13, 2023 I believe they’ve found the newer gas doesn’t cause the valve and seat wear they thought it would. I’ve run older engines and haven’t had issues due to it. The engines I have had rebuilt, I did specify new valves with hardened seats. Mostly because they were worn and I wanted them to last. That’s been several Model T’s, flathead V8 and the ‘41 Cadillac I run. I’ve driven all extensively. There have been recommendations about adding Marvel Mystery Oil or 2 stroke oil when you fill up your tank I’ve read about. 2 Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-543438 Share on other sites More sharing options...
mowerman Posted December 14, 2023 Share Posted December 14, 2023 Years ago I bought a 62 Ford wagon 1990. It has been sitting since 74 with a full tank of gas believe it or not it ran like mad.Mad with that old shit in there ,,, one I burned it all up refilled the tank and and it didn’t have as much power afterwards Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-543457 Share on other sites More sharing options...
Solution Popular Post jebB Posted December 14, 2023 Author Solution Popular Post Share Posted December 14, 2023 Got my info and found 13-18 degree is about right she purring now 4 Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-543458 Share on other sites More sharing options...
mowerman Posted December 14, 2023 Share Posted December 14, 2023 Excellent… bob Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-543472 Share on other sites More sharing options...
mowerman Posted December 14, 2023 Share Posted December 14, 2023 13 hours ago, mowerman said: Years ago I bought a 62 Ford wagon 1990. It has been sitting since 74 with a full tank of gas believe it or not it ran like mad.Mad with that old shit in there ,,, one I burned it all up refilled the tank and and it didn’t have as much power afterwards And yes, as I mentioned, I am still kicking myself in the ass that I sold that car one owner 78,000 miles… bob Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-543479 Share on other sites More sharing options...
terry Posted December 14, 2023 Share Posted December 14, 2023 6 hours ago, mowerman said: And yes, as I mentioned, I am still kicking myself in the ass that I sold that car one owner 78,000 miles… bob We’re all kicking ourselves on cars that we sold when we were young! Terry Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-543491 Share on other sites More sharing options...
mowerman Posted December 15, 2023 Share Posted December 15, 2023 Ooooooooooooohhhhh my god bro that has to be one of the dumbest moves I’ve ever made and yes, lots of us I think we’ve discussed this before at least I know I’m not the only fool that made a dumb move and may be more than one… bob Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-543494 Share on other sites More sharing options...
mowerman Posted December 15, 2023 Share Posted December 15, 2023 Still kicking myself in the ass by not hiring on with the company I’m with now back in 1983 I would have been in a lot better shape retired $$$$$$$$$$ Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-543495 Share on other sites More sharing options...
jebB Posted December 18, 2023 Author Share Posted December 18, 2023 On 12/13/2023 at 10:06 PM, jebB said: Got my info and found 13-18 degree is about right she purring now Took her out today she lost power on steep incline maybe not getting fuel have electric pump with regular on it going to open up some and maybe more timing a little Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-543675 Share on other sites More sharing options...
mowerman Posted December 20, 2023 Share Posted December 20, 2023 I’ve had issues similar with just a bad set of points. Good luck bud…. Bob Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-543829 Share on other sites More sharing options...
jebB Posted January 8 Author Share Posted January 8 On 12/13/2023 at 10:26 AM, HarryS said: I found an old B Model operation manual for gas powered trucks. It calls for 10* BTC with 91 octane gas. That was when gas was gas with lead and without alcohol. The closest thing in today's gas would be non ethanol with the same octane rating if you can find it. Probably have to experiment from that point. Yes found book it does say 10” in it and I have a fire truck and it said 0” so I change it…. Now have to wait for a good day to run her Quote Link to comment https://www.bigmacktrucks.com/topic/73637-timing-707c/#findComment-544825 Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.