Allis chalmers C manifold TVO or benzine

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   There are 2 différents manifold for the model C.
For the bi fuel , the TVO have an internal heater too increase the temperature of the air intake
The benzine don't have it
Do you think when using only benzine, the heater wil reduce power as there is less air coming in the cylinder?

Edited by John426 - 12 Jul 2022 at 1:51pm

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John426 Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 14 Aug 2012 Location: France Points: 304	Post Options Post Reply Quote John426 Report Post Thanks(0) Quote Reply Topic: Allis chalmers C manifold TVO or benzine Posted: 12 Jul 2022 at 1:50pm
	There are 2 différents manifold for the model C. For the bi fuel , the TVO have an internal heater too increase the temperature of the air intake The benzine don't have it Do you think when using only benzine, the heater wil reduce power as there is less air coming in the cylinder? Edited by John426 - 12 Jul 2022 at 1:51pm

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steve(ill) Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Access Joined: 11 Sep 2009 Location: illinois Points: 85777	Post Options Post Reply Quote steve(ill) Report Post Thanks(0) Quote Reply Posted: 12 Jul 2022 at 7:29pm
	Benzene is added to gasoline ( petro) to raise the Octane ratings.. I assume that is what you are talking about... Not running the motor on pure benzene ?? Octane ratings... gasoline 90 benzene 114 TVO 70 BTU values... gasoline 120,000 benzene ---- TVO 140,000 Gasoline has a lot higher OCTANE rating than TVO so it will need the timing advanced and normally has more compression in the cylinders.. TVO actually has more BTUs per gallon, but needs retarded spark and low compression to take advantage of it. You should be fine running petro ( gasoline) in the TVO ( fuel oil) manifold. ... Edited by steve(ill) - 12 Jul 2022 at 7:51pm
	Like them all, but love the "B"s.

Les Kerf Members Profile Send Private Message Find Members Posts Add to Buddy List Orange Level Joined: 08 May 2020 Location: Idaho Points: 1072	Post Options Post Reply Quote Les Kerf Report Post Thanks(0) Quote Reply Posted: 13 Jul 2022 at 3:26pm
	I am not familiar with the Allis-Chalmers sales literature of that era, but my 1941 John Deere Model “A” tractor was advertised as an “All Fuel” type and was intended to be used with any of the various low-octane fuels that were less expensive and readily available at that time. These low-octane fuels were sold under different trade names and varied somewhat in chemical makeup; some were called Tractor Fuel, Distillate, TVO, Kerosene, Fuel Oil, etc. What these fuels all had in common were low octane and low price; they are not necessarily cheaper today though. Typically they required low compression ratios, pre-heated intake systems, altered ignition timing, and were usually started on gasoline (petrol) then switched over to the low-octane fuel once the engine was warmed up to operating temperature. The normal shutdown procedure was to simply shut off the fuel supply to the carburetor because it was difficult to re-start the engine using the low-octane fuel. There was usually a recommendation to change the engine oil more frequently due to a tendency to contaminate the oil more with the distillates than gasoline. 20+ years ago I experimented using some kerosene fuel in my Johnny Popper; it worked but was a hassle, I don’t recommend it. I have several times obtained contaminated diesel fuel for free when someone inadvertently put gasoline in their diesel powered automobile; I was willing to put up with the hassle due to the fact that I got it for free. If you mix diesel with gasoline using no more than 20% diesel it works pretty well. Your engine will run just fine on gasoline (petrol) so long as the carburetor jetting is optimized for the fuel; it will be slightly less powerful than an engine having the non-heated intake and higher compression.