U Moline HP

[Anonymous-0]

What kinda HP can be made with a U moline and keeping a 5" stroke? Looking for 75-80 HP. Is it possible withe the U crank?

 

[Anonymous-0]

With the right manifolds, carb, and cam you can get an honest 85 hp with a 4 5/8 x 5 engine

 

[Anonymous-0]

Would that be the 670 "y" intake or something else? I'd like to run it on lp. Would a cam help a stock engine that much? What heads would be a good choice?

 

[GR Gold]

The 670 has a better intake and exhaust manifold, better square port heads, and a better grind on the cam. Some of the horse power increase is from the higher rpm that the engine is governed at. I believe I still have one set of the LP manifolds, and a pair of heads I could sell. Drop me an email.

 

[yellowjacket]

If you get a set of 4.81 bore pistons from welters and leave stock 5" stroke that puts you about 363 cubes. I have a U that I pull with this set up, I have 4232 heads on it, run about 20% over on rpm (approx 1750) rebuilt the governor and carb and put on electronic ignition and recurved the distributor. I didn't do a cam, but the next best thing is on a U to move the cam gear back one tooth on the crank gear (might be the other way around, can't remember) anyway I got an honest 90HP at the shaft on dyno. Also run 112 octane racing fuel. Good to pull or could go out and plow with it all day if you want!

 

[yellowjacket]

I also run the 670 LP manifolds

 

[Anonymous-0]

What jugs do you use for the 4.81 pistons? Can stock U jugs be bored that big?

 

[puller1]

you will need the short jugs off a 336 cube motor like a M5. Welters can help you with those as well as the pistons & gaskets for the correct spacing.For a real boost get a G moline crank as well. Stamm tractor has the jugs also.

 

[dan osborne]

Forgot to mention I have M5 and 670 blocks as well. Email if interested.

 

[yellowjacket]

Use later jugs off of a 670. They would be the same part number as an M5 block but get them off of a 670 instead because they will have more webbing up inside making them just a touch heavier. You can bore them that far with no problem. U jugs would be a different story though. Also, if you do this, you will need extra copper "spacer" gaskets to put under the blocks if you use the 283 case. The 283 U crankcase is about 1/16 or an 1/8 shorter than the 336 case and if you don't use spacer gaskets your pistons will come up too high and hit your heads.

 

[MM allover]

crankcases are exactly the same hieght!!! rods are different length between a 283 and 336 gas. God I love misinformation.

 

[yellowjacket]

Well, mr misinformation, I used the same rods, I'm sure you'll give an explanation for that mr. genius, I'm waiting!

 

[MnM 44]

283 336 403 504 605 crankcases all measure 9.220 inches from center line of the main bore to the top of the crankcase. I cant tell you what rod and piston combo you used but I can tell you for a fact the crankcases are the same heigth. I have used all these crankcases in pullers for the last 25 years with strokes up to 7.5 and bores up to 6.125 so you can believe me or go measure yourself. It never ceases to amaze me that people will believe something because a guy was told so by his neihbor whose cousin use to live next door to guy whos sister married a fellow whose grandpa saw a moline one time instead of the guy who actually works on molines every day of his life but suit yourself.

 

[MnM 44]

You explaind it yourself you used spacers. Also an M5 block is a 10A15154 and a M670 is a 10A22196 and there are two different versions of it one with the bores cast together coming out the bottom of the block and one where they are seperate. Hope this isnt too much information for you at one time.

 

[yellowjacket]

Here's the deal. I put the motor together and the pistons came up through the blocks. I used 336 blocks and the U rods. Obviously a problem. I talked to a man who had over 40 years of experience with MM motors. He told me their was a difference in the crankcases and told me I needed spacers. I used them and the problem was fixed. I never measured the crankcase of the 283 vs. a 336. I just figured he was right since it fixed the problem. He never mentioned a rod difference and I have never heard that before. You may very well be correct, it just irritated me the way the other guy posted, get it? It's just like you're standing there talking to someone and someone butts in and is rude. Like I said, never measured the cases. Got the blocks from a place in KS and they said everything would fit, but it didn't. All the other guy had to say, politely,was he disagreed and he didn't think I was right. Case in point, now someone else has jumped in ( you ). If you and he are right, then you're right. Simple. My last post wasn't about who was right, it was about being respectful.

 

[MnM 44]

No disrespect intended just wish people would check there info before stating it as fact. I see misinformation on MM all the time and every time you try to correct someone you end up in an argument. The 283 rod is 10 inches long and the 336 gas rod is shorter by 3/16 ths of an inch this was done to accomadate the use of the 403 or 605 piston which moline already had. The diesel 336 has a 10 inch long rod.

 

[MnM 44]

It is a discussion forum right? How aM I butting in?