All-fuel vs gas manifold

MessingK · Apr 15, 2014

I have a late styled by I'm restoring. I was looking online and noticed my manifold looked different than most being sold. After some more searching, I believe it might be an all-fuel (hot) manifold. The tractor is a gas tractor, only one fuel tank, never plan on running kerosene. If that's true, would there be any benefits to putting on a gas manifold?

The first photo is of what mine looks like vs a gas manifold.

gtx1967jewison · Apr 15, 2014

Is your serial no. Above 201,000? If not, it's not a late B.

MessingK · Apr 15, 2014

300661

gtx1967jewison · Apr 15, 2014

Yours is supposed to have the gas one, in the bottom picture.
The benefits? Well that's a matter of opinion, IMO

wilamayb · Apr 15, 2014

It appears that you do in fact have an all-fuel
manifold for a late B tractor. If your tractor is
honestly an all fuel (has two fuel tanks) and you
wish to restore it to be totally original then go
ahead with your AF manifold and AF pistons. If
you intend to use your tractor for any type of
work then I would suggest using a gasoline
manifold. It will be more efficient and will
allow you to use high compression pistons.

If the compression is raised with high compression
pistons and the AF manifold is used, the fuel
charge will be preheated in the manifold which
will lead to detonation when heated even more by
the high compression pistons.

MessingK · Apr 16, 2014

Thanks for the help. I had no idea until just now that was an all-fuel manifold. The block has already been bored and new non all-fuel pistons bought.

schultz47 · Apr 16, 2014

Hmmm By the pictures I also have an all-fuel manifold on my '49 B, serial # above 201,000. I bought the tractor from the original owner. Only has one tank..

wilamayb · Apr 16, 2014

In cold climates sometimes a warm manifold was installed to keep the carburetor from icing.

It's also possible that since 1949 either the hood, manifold or both have been changed. Your SN research should reveal which fuel type your tractor left Waterloo, IA.

Back in the 70's and 80's these tractors would only bring a few hundred dollars which meant that they were not worth spending the dollars to make them run. This meant that a part that would fit for a couple bucks was better than the correct part for more dollars.

ET · Apr 16, 2014

It's not uncomon to find the hot manifold on late B's that are run in cold climates. The gas manfolds frost up quick in freezing tempatures. I have used the tea kettle to thaw the frozen B carburetor. The benefit is the cold manifold makes a little better power in the summer.

All-fuel vs gas manifold

MessingK

Member

gtx1967jewison

Well-known Member

MessingK

Member

gtx1967jewison

Well-known Member

wilamayb

Well-known Member

MessingK

Member

schultz47

Member

wilamayb

Well-known Member

ET

Well-known Member

Similar threads