D17 stroker build
Printed From: Unofficial Allis
Category: Other Topics
Forum Name: Pulling Forum
Forum Description: Forum dedicated to Tractor and Garden Pulling
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=210806
Printed Date: 16 Sep 2026 at 1:12pm
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: D17 stroker build
Posted By: blue924.9
Subject: D17 stroker build
Date Posted: 18 Apr 2026 at 4:31pm
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Lost our local pulling association where my mild 240 inch engine was competitive. Next closest association my suitcase weights require me to pull up 1 more division and I have some heftier competition. A couple years back I bought a wd for parts that has a series 4 d17 engine in it, but it’s locked up. I’m thinking it’s about time to research building a hotter engine, who does stroker cranks these days? I have seen the name Dan Karpel used recently with positive feedback. Anyone else? I’m not looking to push the edge of extreme performance or pay top dollar. In would like something in can build and run for years reliably. I’m not real experienced with big cube Allis engines maybe what I’m looking for doesn’t exist either lol. I would also be open to suggestions on build recipes or already built engines for sale ------------- hi my names dan, I am a young guy. i have a problem, i prefer my tractors orange and my clutches mechanical, thanks for letting me share |
Replies:
Posted By: DrAllis
Date Posted: 18 Apr 2026 at 5:37pm
| I can fix you up with whatever you want, but it won't be cheap. You have really given no idea of what you want other than 240 cubes isn't enough. What HP/performance was your 240 cube engine?? How much cranking compression psi did it test at ?? This is indeed the starting point for HP increases or no increase at all. I've built four engine sizes over the last 40 years. 240-310-360-395. More cubes cost more $$$$. Your rules and weight classes play a huge part in engine build specs as well. All of these engines will fit in a 3,000 lbs WC chassis, or a 4,000 lbs D-17 chassis. |
Posted By: blue924.9
Date Posted: 18 Apr 2026 at 10:25pm
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It’s been close to 10 years but I’m pretty sure the 240 put out 53 horse using an 1/8 over bore and some mild head and manifold polishing with a larger carb. It isn’t using flattop pistons for high compression I believe the kit was 7.25 to one. I would be interested in costs/specs on the 310 and 360 inch motor. It would be going into a wd chassis with 38s on it ------------- hi my names dan, I am a young guy. i have a problem, i prefer my tractors orange and my clutches mechanical, thanks for letting me share |
Posted By: IBWD MIke
Date Posted: 19 Apr 2026 at 5:41am
| I have a 45 crank that would be a great candidate for stroking. 1 journal is .040 under and needs ground. It's no good for a stock rebuild but if you are going to weld on it to stroke it, no big deal. Price would be reasonable.... |
Posted By: DrAllis
Date Posted: 19 Apr 2026 at 7:27am
| The "310" engine is a 4.500" bore and 4.875" non-welded stroker. The pistons I use are custom made to my specs with a Power Crater bowl and 12 to 1 compression. Without calling my vendor for today's current prices, I'd say we are at $1,000 bucks minimum for pistons, rings and pins. Custom sleeves would probably run $600 dollars. Different connecting rods configured to work will be at least $500 for a set. Having your D-17 crank offset ground to 4.875" stroke will run probably $600 minimum. Boring your block to accept the larger sleeves can run nearly $100 a hole these days. So, I see a total of $3100 as a starting point with no labor to assemble. Then, there's main and rod bearings and camshaft bushings. Also, a camshaft grind would be in order. A copper head gasket with sealing wire grooves cut in the top of the block will be needed too. The "360" engine would be a welded stroker of 5.375" for another $800 ?? and more labor grinding places inside the block for clearance. A D-17 block/crank is preferred for strength. You'd be looking at next summer to have these parts all rounded up and a machine shop that wants to do the machine work. |
Posted By: blue924.9
Date Posted: 19 Apr 2026 at 9:45am
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Thank you for the offer but I have a complete chassis and d17 engine for this project ------------- hi my names dan, I am a young guy. i have a problem, i prefer my tractors orange and my clutches mechanical, thanks for letting me share |
Posted By: blue924.9
Date Posted: 19 Apr 2026 at 9:52am
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Thank you doc, is this something I could put together myself? I am a mechanic by trade but I am not too proud to admit there are things outside my capabilities. As long as there would be no special procedures needed for balancing the assembled rotating assembly I would put it together myself. Next summer timeline would be ok as I have to get this sized up d17 tore down and inspected, the seller said he only left the can off the stack and water got in but I’m not taking his word for it. The other thing I wanted to talk to you about is what kind of power would the 240 make with the flat top pistons back in it. I have done some research and that combo comes up frequently but I haven’t seen power numbers ------------- hi my names dan, I am a young guy. i have a problem, i prefer my tractors orange and my clutches mechanical, thanks for letting me share |
Posted By: HudCo
Date Posted: 19 Apr 2026 at 1:32pm
| how much more is a4.875 stoke going to do with the 4.125 bore hp wise ? what cu.i does that make ? i have been looking in to gethering parts to up my engine this next year, winter. |
Posted By: d17brown
Date Posted: 19 Apr 2026 at 2:14pm
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I have a 170 engine complet if you need one to satrt with ------------- phil |
Posted By: DrAllis
Date Posted: 19 Apr 2026 at 4:52pm
| One thing I failed to mention. There is only so much room inside the Allis engine to bore and stroke. Our Farmall competitors with "M" engines can reach nearly 600 cubic inches if they spend enough money. Same can be said for 88 Olivers. Understand that you really cannot compete if the competition is really tough when you get over 4500 lbs. |
Posted By: blue924.9
Date Posted: 19 Apr 2026 at 7:39pm
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This would be a 3500 4000 and 4500 class tractor, maybe 5000 on the right day ------------- hi my names dan, I am a young guy. i have a problem, i prefer my tractors orange and my clutches mechanical, thanks for letting me share |
Posted By: DrAllis
Date Posted: 19 Apr 2026 at 9:07pm
| This 310 engine will still be a low gear tractor with 38 inch rubber. It will be much more powerful than what you have but 2nd gear is pretty much not gonna happen unless you are 360 or bigger. Is there a speed limit ?? ******* A WD-45 diesel rear end is 15% slower geared, and makes second gear work pretty nice (4 mph class) if the engine is big enough. That being said, the 15% speed reduction makes low gear awfully slow. |
Posted By: blue924.9
Date Posted: 22 Apr 2026 at 10:35am
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Speed limit would be 3 or 4 mph with 10 or 20 percent rpm allowed, ------------- hi my names dan, I am a young guy. i have a problem, i prefer my tractors orange and my clutches mechanical, thanks for letting me share |
Posted By: PaulB
Date Posted: 22 Apr 2026 at 1:20pm
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For Grampa gear (speed of a slug) pulling, just get factory weights. ------------- If it was fun to pull in LOW gear, I could have a John Deere. Real pullers don't have speed limits. If you can't make it GO... make it SHINY |
Posted By: blue924.9
Date Posted: 22 Apr 2026 at 6:30pm
No competition, only 1 place has the factory stock class and maybe a couple tractors. Might be first gear but when the average competitor has say 75 horse and they set the sled to stop them 53 horse still ends up in the back of the pack. 28s don’t help but not enough coal in the fire to turn 38s. Either that or I’m not to proud to take donations to build a faster rig  ------------- hi my names dan, I am a young guy. i have a problem, i prefer my tractors orange and my clutches mechanical, thanks for letting me share |
PaulB wrote: