wd 45 crank installed in wd block

nuttin a little JB Weld can't fix!

Sorry It should say chain box not both. I am using a steel box to hold the chain. The wd and wc are shares but ran a couple years ago when parked. I was going to sell one and cannibalize the other for parts. Which would be worth more? Ted

Call me a chicken I think I'll take my chances with 9.3 compression and leave the pistons alone. I will run high test and adjust the timing accordingly. Thanks to everyone for their input. I don't think I explained that I am doing two tractors. They are both wd45's but one had a wd engine in it. One has wide front and power steering (1955). I ordered the 8.2 compression pistons for the wide front wd 45 engine. I am locating  9 spring pressure clutches for each tractor. I had the radiators recored and the gas tanks lined . I sent the heads to the shop for valves guilds and seats. I have a spare wc and wd  for parts. I still need to find snap couplers for the lift arms. The tires and rims on the wide front wd 45 are in great condition and calcuim filled. The tricycle (1954) has bad rims that I intend to replace and then fill them. The tires are excellent shape. I have 6 Allis plows . 3 -2 bottoms mounted , 2 - 3bottom mounted, and a 3 bottom drag plow. I have been pulling plows out of the snow every where on our farms. As Dr Aliis might remember I am going to try to out plow a Moline Ub special pulling a 2 bottom drag plow.  The narrow front with the wd engine  will pull a two bottom. The wide front will pull a 3 bottom. I will raise the left side of the tractor 6 inch and adjust the plow flat to the concrete floor. I intend to hang 2 weights on the left rear wheel of the wide front tractor.I would do both tractors but I only have two wheel weights. I will bolt a chain both to each front end. I figure about a 100 lb of chain up front should work well. I have a lot of chain, Don't ask.  I will wire brush the boards and plow ahead of time to insure everything is operating and shined up as it should. If I can figure out how to load pictures I will try to post some. Thanks Ted

I am going to post kents picture of pistons cracked tonight.

Hello Mack, I  do not know the piston that  he is cutting that much material off of and it may be thick enough. Maybe Kendak will post the pictures of the busted/ cracked pistons that he removed about the same amount of material from .

Mack, How much would you remove from the piston tops? Also where do I find the serial number on the tractor . I assume it is different then the number on the engine. Also will an early 9 spring d 17 clutch fit the wd and the wd 45. Thanks Ted

Alliswd ,I am glad you posted . A  175 at pto rpm was 54 hp with a 8.2 compression ratio . So with your post a 1 point static compression ratio change with everything else being equal is worth 4hp. Fair assessment would you say?

Edited by mlpankey - 30 Jan 2011 at 7:18pm

You going to use a custom gasket ? Victor renz or felpro blues gasket compressed is .042 . On the timing don't limit yourself by a fixed number of 20 degrees. Degree of timing is a factor of three things compression, octane of fuel and spark plug heat range. When you decide those three factors then put the timing that it runs the best in it and if your not hearing impaired it makes itself audio apparent. dont trust the flywheel and bellhousing pointer as top dead center either when using a different crank.

Edited by mlpankey - 30 Jan 2011 at 2:21pm

Which is exactly what I now come up with when I plug in a 4 1/2 " stroke instead of 4 inch stroke....my big mistake. I still would use it at 9 to 1 and fuel it with 89 octance gas and be sure to back the timing off to around 20 to 22 degrees BTDC instead of 30 degrees like it was originally.

If the pistin is .750 from top plus a .042 head gasket, the .500 longer stroke would put the piston .542 from head. A 4.500 stroke would put the piston5.042 from head at bottom. 5.042 Divided by .542=9.302-1    MACK

I wasnt smart about it .   The only reason I fool with antique tractors  is the rules for pulling  . My pistons are fairly modern 2009

Well if your math is right by the time you had correct gasket figures and considered the degrees at which the intake valve closes abdc then it would fall into 7 to 7.5 range for effective compression. Should run on low octane from the pump.

Edited by mlpankey - 29 Jan 2011 at 11:03am

RichinWis wrote: Does anyone on here have a picture of M&W pistons that they can post on here for a WD45?

Nope I don't waste my time on  over priced 1950 piston technology due to antiquity.

I check the compression ratio at 9.2 with a flat top piston .500 below deck .042 compressed gasket with a 4.25 bore opening a 4. inch piston bore and 4.5 stroke. should run fine on medium grade fuel or fuel with a percentage of ethanol especially if you leave the cam straight up.  If you don't want 9.2 cr don't mill the pistons just don't put the top compression ring on and use two compression rings like automotive.  They are some power in less ring drag also.

Edited by mlpankey - 29 Jan 2011 at 10:04am

I've never suggested grooving the main brgs on the "W" series engines. The "G" series engine main brgs are grooved for more continuous oiling of the rod brgs. I don't know how you'd cut a groove into a "W" brg and keep the brg material together??? I'd be too scared to try it I guess. I've never known rod brg failure to really be an issue unless some clown overhauled the engine and didn't replace the CAM BRGS !! A 170 gov spring will gain you about 100 rpm (1800 vs 1700) over a WD spring.