8N Funk

Hi all. As I continue my work on the 1951 Fork Funk (6 cylinder) I have a couple of questions for those more familiar with these.

I have given it a complete tuneup, with new plugs, plug wires, coil, cap, rotor, condenser, the works. Also had the carb rebuilt by a
local carb shop. Fresh gas, basically the works. It's also a 12 volt conversion. Starts immediately, idles like a sewing machine.
Problem comes about when I start in get into the higher RPM's. It starts balking, sputtering, and acting like it's missing. Ruled out
lack of gas, getting plenty. All the ignition stuff has been replaced, except the distributor, but didn't see anything wrong with it.
Tight bearings, etc. Two things; one, the guy who did the original restoration did NOT put a muffler on it, just straight pipe. Noisy as
all get out, thinking of a "glass pack" which seems to be the norm. Also, ran it for a half hour today, up and down the road. Ran, but a
bit balky. Can't make full RPM, 2100 is it. Second thing I noticed, after pulling back into the shop, the carburetor body was "ice cold"
all the way up and down. Like too much cold air going through it? Outside air temp was in the 50's. Low humidity, under 40%.

Also noticed condensation from the crankcase vent forming on the starter motor which is right below the vent. I haven't checked yet, but I
am suspicious that the previous owner may have removed the thermostat?? Can't get engine temp much above 140 degrees.

Trying to figure out why the darn thing just doesn't want to run well at the higher RPM's. Do any of these items give anyone a clue?

I've worked on old engines before, but this one has me baffled. I should also mention that I did a cold compression check on all
cylinders. Every one (all six) came in at 110 to 120 PSI.

Ideas???

All of my answers are not Funk specific, but I would check the
timing with a timing light and make sure it is advancing as it
should when the RPMs are increased.

The cold carb is pretty normal. They ice over at times here.
I'd make sure the thermostat was in it too.

Takpak,The engine governor is probably set at 2100-2200 RPMs and the engine cuts back at that speed.

Sounds like the engine is running "lean". I don't like a down-draft carb. on the Funk tractors because the throttle requires too much effort to quickly regulate engine speed (the governor is not strong enough to operate the booster pump in the down-draft carb.) . I have two 6-cyl. Funk tractors and to overcome my problem I made an adapter and mounted a 801(172 cu. in. Ford tractor) up-draft carb. on them. Throttle response is much better and you can adjust air/fuel mixture to eliminate rich/lean problems.

"Ideas???"

Resolve the T-stat issue, get it WARM, then post back with the results.

My son had a 8N funk w/6 cyl for several years. It had a lean condition too. Stumbled when trying to speed up and I had the carb apart several times after putting a kit in it. I was relaxing on the computer one evening and it hit me. I went to the garage and looked at some old Holley jets left over from race carbs and I found one about 3 numbers larger (jets are numbered) installed it and problem solved. Ran like a champ. I do have a NOS water pump we didn't need in my garage. Fits early 226 engines.

where is the choke in all this? Are you sure its wide open? If its open what happens if you close a bit when it start to spudder?

Kevin

If you have a set of number drills try opening the jet to one size larger,I think you have a fuel starvation problem,you may have to go two to three sizes up,if you have a extra jet that would make it easier then you always have the original to put back in to compare.

On the question of the fuel and choke, I should have noted that as I run it up in RPM's, I tried choking it a bit to see what would happen. I barely get the choke out a bit and it starts to "load up" and really sputter. If I pull it all the way out, it just "kills" it and it comes to a stop. So, based on that (unless I'm way off base) I would say that it's getting enough fuel? Previously, before rebuilding the carb, it was so bad that I had to keep the choke full on" to even get it to run! Now, it's just the opposite.

What carburetor are you using Ford or Carter? What do you think the redline should be on the 226. At this time we are rebuilding 3 six cylinder funks.

Two of the posters have the solution to your problem. That being you need to install a larger jet in your carburetor. Do that and your problem will be solved.

It has the Holley carburetor on it. RPM wise, the specs call for governed RPM to be approximately 2200 RPM.

Even with the "test" of "choking" it a bit and it caused it to load up? That would seem to me to indicate that it was getting enough fuel,
but then perhaps I'm basing that on faulty information?

TakPak,
I am in need of a new distributor cap and plug wires for my 6 cyl Funk, but struggling to locate them in the traditional auto parts supply chain.

Where did you purchase yours? Care to provide contact info and/or part numbers?

(quoted from post at 11:35:11 08/25/18) TakPak,
I am in need of a new distributor cap and plug wires for my 6 cyl Funk, but struggling to locate them in the traditional auto parts supply chain.

Where did you purchase yours? Care to provide contact info and/or part numbers?

Click to expand...

If it is a flat head then a 1950 ford pick up 6 cylinder will get the parts guys something to look up . Ford only made one Flathead 6 , (226 cid ) the early versions had a front mount distributor and about '48 to '51 went to the side mount distributor . If I remember correctly the early / late blocks and heads do not interchange due to water ports .

Thanks Ken,
I have been using "1958 Ford truck with 226 flat head" as my part store reference, but even then have been coming up blank on the wires.