Building A Pulling Tractor - Questions

Ok, not new to tractors, but I recently decided to build my 1941 John Deere B into a pulling tractor.

I want to get more horsepower, where should I start?

You should start by going down a page and a half to the thread about what makes a good pulling tractor. Then after reading concentrate on the ones about JD being the best. Except if you plan to pull stone boat or dead weight

I will be pulling dead weight mostly.

The first thing you have to do is lose your mind completely. Then get a lot of that green stuff in you wallet. When both of these have been accomplished then you just don"t care what it takes to win. LOL

lost my mind awhile ago. just lookin for ideas money isn't really an issue, but i'd like the best gain in power for the buck!

Where is B john deere when you need him, he will
surely see this and weight in. He has everything to
turn your B on. Google- Extreme Tractor Parts.

You need to define what you think you want for HP and how much you want to spend. "money isn't an issue" means different things to different people...

Sample builds in order of $ and HP and relative specs +/-

- Overbore and put some late B pistons = will make it comparable to a late B, only your first gear is faster, about like 2nd in the late B.
- Off the shelf "high compression pistons" = They aren't very high compression, around 6 or 7:1 and they are plenty heavy, small HP gains.

Everything from here down is stuff that I carry.

- 4.75" piston = weighs a little over 2 pounds, sets the compression at 10:1, significant HP bump for a stock tractor.
- 4.75" pistons and stroker crank = should get you in the 50HP range
- Stock Powerblock = somewhere around 28-30HP
- Bore the PB to 5.125" and put good pistons / compression = 40HP
- Bore the PB and stroke it = 60HP
- If you need more HP than that, your wallet has to open quite a bit further, my e-mail's open.

Ideally you'd find a Heisler head. These have bigger runners and less combustion chamber. They are getting very tough to find. the only one I've seen in the past year or so is the one I've got on mine. You can make the stock one work, but you have to put quite a bit of time into it, and you still can't make it as big as the heisler unless you cut the runners out and put something else in there.

* HP numbers are general numbers, cam, head, tuning, etc can greatly change this.

At what point does it make sense to bump up to a larger bore carb from an A to increase the airflow and fuel delivery? What combination of carb and nozzle would you go with?

Id put the A carb on it as soon as you do a litle work to it. THe 71 or 72 work well. I'm sure the 18 wouod as well.

Compression is the key to making the HP. Several guys with 300ci B's that I've talked to have tried G carbs but didn't have enough motor.

Mines at 442 and runs fine on E-85 with an A carb. It could definately use a bigger carb, but has "enough" HP for what I do with it. Going to do some experimenting soon with different heads, carbs, manifolds and fuel. I've got to get some gizmos made up to dyno it off the crank. I'll try to post some results if I can get it all organized.

Hey, I've seen you post some threads about oakley and stockbridge. I've pulled at both and trying to figure out who you are lol. I can help you put a B together or even sell you one Give me a call 989 277 5366