class project

[shanedog]

I am finishing my last year of machine tool at a local technical college. I needed a project and wanted to make something for our 39 A we pull. My dad put me up to a task of making block inserts just like John Deere did back in the day to increase power for the farmers. Well I figured them out and thought id share some pictures.

 

[Dblair]

nice how much does it increase the compression ?

 

[shanedog]

I haven't checked yet, but can tell a big difference in trying to start since it is a hand-start.

 

[twocylindernut]

I would like to have a print for those. I would like to make me a set of them, if you dont mind sharing the dimensions of your set and how you plan on holding them in place.

 

[diesel puller]

Nice job. now figure how to get air in and out with a dam in front of vavles. The plugs were machine alot different than what you made.

 

[shanedog]

I cant give away prints since I did it on school software but if anyone wants a set I could possibly make them for a price. You can email me [email protected]

 

[Dblair]

I hope they work well for you and if you ever get the numbers then I would advertise them .

 

[shanedog]

Yea will post the compression and the horsepower gain when temperatures warm up.

 

[southpull]

For what he's doing these will help performance, not hurt. In a stock application he's hurting for compression not air. You wouldn't want it on a big cubic inch tractor. Good job!

 

[Josh Blackburn]

I used to build something similar but I cut valves holes and tapered back at a 45 degree angle and used a .003 press to keep them in with a .070 lip that set between head an block with 5.875 diameter. (same size as gasket opening). If you turned that 90 degrees and made the two webbings solid you'd be a lot further ahead. Your not going to gain a lot of compression. Maybe 8 to 1 if that.

 

[twocylindernut]

Josh, i would like to see a picture of the ones that you were making. I am interested in making me a set of them as a project. not interested in going in production, just for personal use and a project. i would like to make a set for a A and B.

 

[jon aller]

That is neat.

You might be interested in seeing a different take from the 40's.
Hollingsworth inserts