wd45 engine
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=118178
Printed Date: 25 Nov 2024 at 10:35am
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Topic: wd45 engine
Posted By: hooken allis
Subject: wd45 engine
Date Posted: 27 Jan 2016 at 9:57pm
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I have a wd45 that I'm building into a puller. People I talk to say to get a D17 series 3 or 4 engine. I would like to get 90hp. My question is what is the gain with a D17 engine over a wd45 engine? I understand I need bigger pistons, cam, head work ect. My understanding was the wd45 and D17 were pretty much the same, I guess not. Any information will help. Thank you
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Replies:
Posted By: WF owner
Date Posted: 27 Jan 2016 at 10:40pm
The D-17 (and subsequent) had bigger crankshaft journals/bearings. Other than that, the D-17 engine turned more rpm and (I believe) a different carb.
If you can get a cam ground to the same specs as a (gas) 175 cam, get higher compression pistons (stock 8.25/1 or flat top pistons from a 201)and a D-17 governor spring, you should be able to get more horsepower. I'm not sure about 90 hp with out stroking and other EXPENSIVE mods.
A combine engine was more horsepower than a tractor engine.
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Posted By: Big Orange
Date Posted: 28 Jan 2016 at 1:22am
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Find set of SP46 M&W pistons for a 201 wc or wd . Machine .250 off the piston head. With a 4.5 stroke, the comp. ratio will be 10:1, high octane gas is a must.
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Posted By: DrAllis
Date Posted: 28 Jan 2016 at 6:16am
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The Gleaner model "E" combine is 63 flywheel HP as is any D-17 tractor engine at 1650 RPM and have the same size/CFM carburator. The Gleaner model "E-3" and a very few very late model "E"s are higher compression (Z code) and have 67 flywheel HP.
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Posted By: hooken allis
Date Posted: 28 Jan 2016 at 7:46pm
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Thank you for the good information it will help.
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Posted By: wi50
Date Posted: 28 Jan 2016 at 10:54pm
A wd45 block is lights than the d17. The d17 and gleaner e engines are going to be a little stronger over time, the center main area is cast stronger, heavier etc. Also the d17/e engines have dowl pinned main caps, which is an advantage. The wd45 has floating main caps that are shimmed, so when I build an engine on an early block I have the block line bored to eliminate the shims and get better contact on the bearing cap.
As far as crankshaft strength, the d17 and e engines will have larger main bearings and the cranks are heavier. But are they stronger? That larger mass is working against the laws or physics. If a crankshaft is going to break, it more likely will break in the rod crankpin than breaking in the main.
I've used and know of a good many old WD and WC blocks that have taken a lot of punishment for many years that haven't failed. If I was building an engine e for some paced classes I'd just build the wd45. If I were building something for unlimited speed or rpm then the d17 is worth finding.
As far as cylinder heads, once I hit them with tooling and the grinder, it makes no difference what one they are.
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"see what happens when you have no practical experience doing something...... you end up playing with calculators and looking stupid on the internet"
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