MSefi.com read only forum (Jan.15,2018)

I have been kicking around the idea of Megasquirting several vehicles but to get my feet wet I have a 1953 Allis CA that I was thinking about.

I prefer gas tractors for the chores I do as the cost less to maintain and start easier but their archaic carbs make for poor tune or your always fiddling with them especially if you switch between heavy tillage and light chore type work.

I would really like to do my John Deere 2020 first but as my main tractor I need so I will tinker with my CA.

CA is a 125 cubic inch four rated about 25hp. Remember those are continuous numbers such as pulling a plow all day and at only 1650 rpm. Gravity fuel, oil bath air cleaner, and updraft single barrel carb and a governor. It is overhead valve but has Siamese intake ports 1-2 and 3-4 share intake runner. First thought was just two injectors into bungs mounted in the manifold pointing into the ports. If I understand everything correctly I can set a batch set up, one injector per bank and since it would fire every revolution it would sort of be sequential because of the shared port?

I also wondered about a single barrel tbi such as on early gm 4 and dodge k cars

Will these tbi work upside down with the updraft manifold?

Will an o2'sensor have an issue as it will have to be mounted to the 2 inches of pipe between the manifold and muffler?

I would like to drop the distributor as well. I still am confused is extra modules are needed to control something like edis or autotunes quadspark?

I am concerned about weather resistance as well. Is the ms2 aluminum box weather proof? The space for it's limited and is protected from direct rain(not as bad as under a car hood) but no where as protected as mounted in cabin

Also which one. With the low speed nature will the 100 rpm resolution of ms1 be a problem? I am also confused as to weather or not ms1 can control the spark advance or not? I would rather spend money on high quality wire connectors and durable components than the fanciest options. Old girl is really a nice tractor and better cold starting and fuel economy would be a huge plus.

Note, I have much machinining,mech,and electronic skills. Pretty good at tuning carbs including multi carb setups and have had some success in tuning my hd efi sportster with tts mastertune software.

firebrick43 wrote:I have been kicking around the idea of Megasquirting several vehicles but to get my feet wet I have a 1953 Allis CA that I was thinking about.

I prefer gas tractors for the chores I do as the cost less to maintain and start easier but their archaic carbs make for poor tune or your always fiddling with them especially if you switch between heavy tillage and light chore type work.

I would really like to do my John Deere 2020 first but as my main tractor I need so I will tinker with my CA.

CA is a 125 cubic inch four rated about 25hp. Remember those are continuous numbers such as pulling a plow all day and at only 1650 rpm. Gravity fuel, oil bath air cleaner, and updraft single barrel carb and a governor. It is overhead valve but has Siamese intake ports 1-2 and 3-4 share intake runner. First thought was just two injectors into bungs mounted in the manifold pointing into the ports. If I understand everything correctly I can set a batch set up, one injector per bank and since it would fire every revolution it would sort of be sequential because of the shared port?

While this can run, it tends to get poor fuel distribution on a siamese port engine; one port tends to get more charge than the other.

I also wondered about a single barrel tbi such as on early gm 4 and dodge k cars

Will these tbi work upside down with the updraft manifold?

I've seen TBIs mounted sideways, and they can probably work upside-down too, although I haven't tried it. I would expect it may have somewhat less of a charge stealing issue because the fuel is already atomized and mixed with the air.

Will an o2'sensor have an issue as it will have to be mounted to the 2 inches of pipe between the manifold and muffler?

Not if you can mount it in the upper half of the pipe (or if the pipe is vertical, this doesn't even matter; the main issue is the sensors are damaged by water).

I would like to drop the distributor as well. I still am confused is extra modules are needed to control something like edis or autotunes quadspark?

It depends on what code version you're using. The B&G code discussed on this forum would need EDIS. The QuadSpark (and several other distributorless ignition strategies) need the Extra code, discussed on MSExtra.com.

I am concerned about weather resistance as well. Is the ms2 aluminum box weather proof? The space for it's limited and is protected from direct rain(not as bad as under a car hood) but no where as protected as mounted in cabin

It is not meant for being exposed to the elements. You could use a sealed project box or a MicroSquirt.

Also which one. With the low speed nature will the 100 rpm resolution of ms1 be a problem?

Probably not.

I am also confused as to weather or not ms1 can control the spark advance or not?

Only with the MS1/Extra code. This is covered on MSExtra.com.

I've got a '48 Ford 8N, and I've toyed with the idea of MS'ing it as well. Keep us posted, I'm interested to see how this turns out!