B Engine Cylinder Head Performance

Hello gentlemen, ladies. First I would like to say that I am not pulling with my tractor, but I would like to share and ask questions about performance concerning just the model B (125ci) engine.

I removed the cylinder head off my engine, removed the valves and guides, pressure washed it and inspected it. There was substantial corrosion in the runners and valve pockets. I spent roughly six hours shaping and blending the runners and pocket areas to both remove the damage and smooth-blend below the valve seats and reduce the radii of the split intake "Y". Before doing a final smoothing/blending I took the head in to have .150 skimmed off the surface.

Looking at the factory rocker arm assy I can see room for improvement. First I measured a stock rocker to get an idea of the ratio. Center of shaft to center of valve stem 1.95 and center of shaft to center of pushrod 1.30. Divide 1.95 by 1.30 equals 1.5 ratio. This was just an "eyeball" measurement but it's what I am going to go by.

" border="">

	This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
	The Forum	Parts and Services	Unofficial Allis Store	Tractor Shows	Serial Numbers	History

Author	Message Topic Search Topic Options Post Reply Create New Topic Printable Version Translate Topic
Ryan59 Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 30 May 2016 Location: Kansas Points: 68	Post Options Post Reply Quote Ryan59 Report Post Thanks(0) Quote Reply Posted: 13 Jun 2016 at 5:09pm
	" border="">

Sponsored Links

Ryan59 Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 30 May 2016 Location: Kansas Points: 68	Post Options Post Reply Quote Ryan59 Report Post Thanks(0) Quote Reply Posted: 13 Jun 2016 at 5:07pm
	" border="">

Ryan59 Members Profile Send Private Message Find Members Posts Add to Buddy List Silver Level Joined: 30 May 2016 Location: Kansas Points: 68	Post Options Post Reply Quote Ryan59 Report Post Thanks(0) Quote Reply Posted: 13 Jun 2016 at 5:02pm
	Hello gentlemen, ladies. First I would like to say that I am not pulling with my tractor, but I would like to share and ask questions about performance concerning just the model B (125ci) engine. I removed the cylinder head off my engine, removed the valves and guides, pressure washed it and inspected it. There was substantial corrosion in the runners and valve pockets. I spent roughly six hours shaping and blending the runners and pocket areas to both remove the damage and smooth-blend below the valve seats and reduce the radii of the split intake "Y". Before doing a final smoothing/blending I took the head in to have .150 skimmed off the surface. Looking at the factory rocker arm assy I can see room for improvement. First I measured a stock rocker to get an idea of the ratio. Center of shaft to center of valve stem 1.95 and center of shaft to center of pushrod 1.30. Divide 1.95 by 1.30 equals 1.5 ratio. This was just an "eyeball" measurement but it's what I am going to go by. " border="">