andrewj7 Posted August 21, 2015 Report Posted August 21, 2015 What fuel do people use in their B-1 trucks? Wondering if a supplement is needed for the original engines Quote
Barabbas Posted August 21, 2015 Report Posted August 21, 2015 Nothing needed--these old flatheads have hardened valve seats and did not depend upon lead in the gas Quote
greg g Posted August 22, 2015 Report Posted August 22, 2015 If you are worried about ethanol, add a filter in line before the fuel pump, change them often, and keep your fuel fresh, don't fillthe tank then take three months to use it. Better to put in 10 gallons at a time and keep it moving thorugh the system than filling it and letting it sit.If you have old rubber in your fuel system the ethanol can have a bad effect. so change out any flexlines to newer stuff. You can get a fuel pump rebuild kit that is ethanol tolerant from places like Antique Auto Cellar, and rebuild you pump so as not to need to worry about it. If you are going to store it then add some stabile or such for piece of mind but if you run it regular other than the pump there is not much to worry about. Quote
Barabbas Posted August 24, 2015 Report Posted August 24, 2015 Yep, the compression on these engines is around 7:1--87 octane is good enough 1 Quote
blucarsdn Posted August 25, 2015 Report Posted August 25, 2015 My tuneup man is reccomending the use of 4 oz of Marvel Mystery Oil per ten gallons of fuel in carburated engines to counter-act the effects of the new fuels which contain varying amounts of ethanol. Bill Quote
TodFitch Posted August 25, 2015 Report Posted August 25, 2015 My tuneup man is reccomending the use of 4 oz of Marvel Mystery Oil per ten gallons of fuel in carburated engines to counter-act the effects of the new fuels which contain varying amounts of ethanol. Bill Other than by wishful thinking, what is the mechanism where by adding an oil to the gas is supposed to counteract ethanol? 1 Quote
Don Coatney Posted August 25, 2015 Report Posted August 25, 2015 Other than by wishful thinking, what is the mechanism where by adding an oil to the gas is supposed to counteract ethanol? I think the beneficial advantage falls into the pocket of the seller of the mystery oil. Quote
Dave72dt Posted August 25, 2015 Report Posted August 25, 2015 Absolutely need fuel supplements. Stop by the store and pick up at least one can/bottle of each brand. With all the claimed extra mileage and performance you'll now be getting , I'll also sell you a couple of gas cans for siphoning the tank for the overflow that you can then sell to the poor unfortunate who neglected to purchase even one bottle. 1 Quote
Don Coatney Posted August 25, 2015 Report Posted August 25, 2015 My tuneup man is reccomending the use of 4 oz of Marvel Mystery Oil per ten gallons of fuel in carburated engines to counter-act the effects of the new fuels which contain varying amounts of ethanol. Bill If that is the best advice from a tune up man I would be looking for another tune up man. Quote
blucarsdn Posted August 26, 2015 Report Posted August 26, 2015 According to my tuneup man he has seen a dramitic increase in accelerator pump failure in the carbureted engines every since the amount of alcohal in fuels has become common. To date I have not had carb problems on any of my carbureted engines.. This being my '39 Plym, '56-57 T-Birds and '65 Corvair Corsa w/4 carbs. Lets face it, it's a "mystery" why MMO works so well , I know guys that swear it does wonders for everthing, including adding to your morning coffee and cereal... Bill Quote
Don Coatney Posted August 26, 2015 Report Posted August 26, 2015 Glad it works for you. But I am even more glad that my carburetors work well without it. By all means as long as it makes you feel good continue to spend the money and use it. Quote
46Ply Posted August 27, 2015 Report Posted August 27, 2015 Haven't heard this anywhere except.... one older guy, who told me I need to use a lead additive because while the seats are hardened the valves aren't! Quote
TodFitch Posted August 27, 2015 Report Posted August 27, 2015 Haven't heard this anywhere except.... one older guy, who told me I need to use a lead additive because while the seats are hardened the valves aren't! Sales literature for '33 talked about special alloy exhaust valves. . . Did the cheap out in later years? Quote
Tom Skinner Posted August 28, 2015 Report Posted August 28, 2015 These old flat heads would run on piss. I once dropped a small screw down the throat of my 1948 Chrysler while it was running and it just passed it out the exhaust. Gasoline was 77 -78 octane in 1948. While it is 87 now, the thing to do is find your sweet spot (timing wise) about 6 degrees advanced to accomodate the newer fuel. The Valves - if adjusted properly, by yourself - so you know they are done right shouldn't have any trouble. The Marvel Mystery Oil is good if you like it, but if you run out of gas and have been drinking White lightning pissing in your gas tank would probably get you home also. With out burning a valve or valve seat along the way L.O.L. "If drinking don't kill me, her memory will, with the blood from my body you could start your own still" - George Jones Quote
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