D17

If you want to build a a gas four banger d17 engine. You can run a 175 gas cam, carb, pistons, and governor spring and make over 60HP that way. This would look stock and be legal at most pulls.

Either one of these combinations will run in the field all day and pull well.

One word of caution. The D17 has a heavy front end and is very hard to get the weight to transfer to the rear wheels. We pulled one with 15.5 38 tires in 6500 and still could get the front end to float.

A WC, WD, or 45 is much easier to get the weight to the back wheels.

I don't know if the newer sixes will bolt in a D17 or not.

I know a 180 or 185 has the bigger engine with basically a d17 series 4 rear end. The middle of the tractor is a mix from a 190 and a newer D17.

We have a WD that is 310 cubic inches. It is 12.5 to one compression, bigger valves, and custom built cam. This type of engine can not be used for ordinary daily work, because of the thin custom made cylinders and high compression.

You could off set grind the crank from a 4 banger gas and use smaller journal rods from a D19 gas or C farmall. You can get 4 1/8 over bore sleeves. You would have to get custom Wisco pistons made that would have the correct pin position, dish type, bore size and compression ratio. I would not go more than 8 1/2 to one compression if you plan on using the tractor for every day use. You could get around 260 to 280 cubes and about 70 to 80 horse this way. I would recommend having a machine/speed shop over see the project. The engine would have to be professionally balanced, because the use of customs rods and pistons.

I seen a WC pull that had 426 cubic inches! It flew down the track very fast and made lots of noise

You may have to make a choice between a puller and a useable tractor if you plan to get competitive. You may be better off getting a lighter WC for $300 and pulling that. All of the D17 four banger engine stuff will fit right in that and it only weighs about 3000 lbs.

Tractor would be used to pull in the antique farm classes with pace tractor for all classes- would need to be pre-1960 . Would also like to pull in farm open classes- which have pace and non pace classes. Would need one already set up to some degree. Not sure of how much investment we are talking though.

Thanks,

Bob