Opinions needed - Farmall 300

I'm curious about different ways adding a little power to my 300. Its got the 350 kit in it now, with fire craters, carb jets were bored out a little, l.p. manifold and I think an l.p. head. Its turning stock rpms, but I wonder if I could turn it up around 2000 rpm? I think 300 utilities run the same motor at 2200 rpms, am I wrong. Will this make my engine into a grenade? Its in good shape now, so I don't want to damage it. I appreciate any input.
Mac

P.S.- she dynos around 41 horses now. Not looking for much, just need a little extra umph on the hills
 
Running 2200 is OK. Putting electronic ignition in it and making sure it advances correctly is a good step. a 350 cam is also realistic. Jim
 
Thanks Jim. What is the best way to measure rpm without having a tach in the distributor. Mine never had one put in. I'm looking at an electronic ignition, but that's gonna have to be my Christmas present to myself. Hadn't thought of the 350 cam, either.

Thanks again,
Mac
 
There are inexpensive strobe flash tachs. that work. Shaft tachs on the PTO, calculated from the posted 540 Shaft speed and original engine speed can be determined. Jim
 
Not meant to ruffle feathers but it's common for the term get a 350 or 450 cam to be used. Two camshaft types were used in those tractors. One just like the 300 and 400 and at serial number breaks a different suffix cam that had left hand cam gear retaining nut with threads. Discounting used condition the only difference in the cams is the threads. Both have the same lift and valve timing.
Running the same setup as you have with gas head, gas manifold like most 350 used and RPM raised. Not a puller just a user. Tried a few different things and found a original jetted supper M carburetor works pretty good for a little extra at high RPM and still lugs pretty good. Engine doesn't seem to like a lot of time for power and running 25 to 27 degrees BTDC at max advance with a 50 50 mix of regular and premium gas. Sometimes the SM carb is just at the point of being lean, at least the ones I tried and may need made just a little richer.
If not sure on the head, look on this site for a picture of a 450 LP head. Find 450 parts, then engine parts. 300 LP head should look the way picture does above the intake and exhaust runners.
 
You can run the engine at a higher RPM, but unless you re-gear the transmission to take advantage of the higher RPM (or run smaller diameter tires), you really don't gain anything.

It takes a certain power to run a certain implement at a certain ground speed. By running at a higher RPM, the tractor moves at a faster ground speed, which requires more power.

When the additional power gained from the higher RPM isn't enough to compensate for the higher ground speed, the engine will lug down. End result the engine lugs back down to where it was running before you futzed with the governor.

Since it's not practical to re-gear the tractor in most cases, the only way to take advantage of the additional power is to run a gear slower, which generally means you are moving slower than you were before you futzed with the governor, and not getting as much work done... UNLESS you then invest in a larger implement. The whole thing is kind of a catch-22.
 
Not meaning to leave it off, just take it off and leave it off long enough to futz with the governor. I also don't quite understand the statement about gearing. I'm not necessarily trying for more draw bar horses, but I do need a couple more for the PTO. Especially on my brush mower. But, if you all think that this won't help, there's no sense in fooling with it. Sounds like I'd get about as much gain with the EI unit installed and properly advanced. I guess I can weigh my options and play with it over the winter.

Mac
 
John the last camshaft IH made to use in H to 350 engines ended up being listed as the same number in parts books after that. More information.
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Right, but did they not share the same part number originally? I think it ended in 222 or 227, jus ta different R number, but the cams were identical in lift and duration? Or am I thinking of something else?
 
May not have stated it to well, but in my first post was trying to say I agree other than the camshaft threads the cams were the same. Left hand and right hand threads were used in 350 and 450 tractors. Right hand thread ones in a 350 are the same number as a 300 originally. Oldest H parts book I have dated 9-39 lists cam 49900DAX. 300 parts book before they included 350 in the same book lists 49900DCX, that's a right hand thread cam. Last cam used in C175 engine number 9607 and up is 49900DDX. Can't remember the other number seen. IH used other suppliers with different number on the part than listed in parts book sometimes. DC and DD cams have the same specs other than threads. Latest parts listing IH put out would list 49900DDX in H, SH, 300, 4 series and 350 tractor parts book.
 
John you were right about a 2. Looked at a spare 4 series cam today with number 45982DC. 45982 is the number not in parts books I couldn't think of in other post. 6 series cams other number is 45955D. For some time I thought maybe none of the cams had a book part number until I finally run across a few.
 

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