D17 vs WD45
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=114729
Printed Date: 03 Nov 2025 at 10:43pm
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Topic: D17 vs WD45
Posted By: jfrdiesel
Subject: D17 vs WD45
Date Posted: 15 Nov 2015 at 6:16pm
| Ok, I'm building a wd45 for pulling. I can buy an overhaul kit to increase compression and 1/8" more bore. Would I be farther ahead to to start with a d17 engine? What makes the d17 have so much more power from stock? I dont see what is so different in a d18 to make 60+ hp stock. Thanks |
Replies:
Posted By: jfrdiesel
Date Posted: 15 Nov 2015 at 6:17pm
| Sorry d17 not d18! |
Posted By: bigcountry48
Date Posted: 15 Nov 2015 at 6:40pm
|
Just buy a 175 rebuild kit for your wd45 motor. Make sure to have your cam ground to 175 specs and get a 175 carburetor. You'll be making more power than the d17 and you don't have to buy another block. ------------- 1950 B, 1952 pulling wd, and 1954 wd45 |
Posted By: jfrdiesel
Date Posted: 15 Nov 2015 at 6:47pm
| Thats the answer I was hoping for! What is the 175 cam and carburetor? Are these stock parts from something or aftermarket? The engine kit I was looking at is 4 1/8" bore with flat top pistons is this the right one? Thanks I'm very new to the a/c brand! |
Posted By: TennMatt1
Date Posted: 15 Nov 2015 at 10:39pm
|
I would like to know as well which carb number. I've been wondering if I could get more hp with a bigger carb. My engine is more than just a 175 kit. ------------- 1954 WD45 |
Posted By: Charlie175
Date Posted: 16 Nov 2015 at 5:40am
I think he was referring to the actual 4" bore, 8.25 compression ratio pistons/sleeves. The 4/125" bore flattops are aftermarket and some kits will actually lower the compression ratio. The cam you will likely not find, and will need to take your cam to a company that modifies it (grind) to change the lob profile to match what the 175 used. ------------- Charlie '48 B, '51 CA, '56 WD45 '61 D17, '63 D12, '65 D10 , '68 One-Ninety XTD |
jfrdiesel wrote:Posted By: CAL(KS)
Date Posted: 16 Nov 2015 at 9:16am
|
yes this topic has been discussed in length. a true 4'' bore power crater kit will yield more power and economy than any flat top overbore kit. ------------- Me -C,U,UC,WC,WD45,190XT,TL-12,145T,HD6G,HD16,HD20 Dad- WD, D17D, D19D, RT100A, 7020, 7080,7580, 2-8550's, 2-S77, HD15 |
Posted By: bigcountry48
Date Posted: 16 Nov 2015 at 2:36pm
|
They're right about the 4 inch power crater, but those can be hard to find. You can get the high compression 4 1/8 piston from agco. It puts out 9:1 compression and gives you a couple extra cubic inches. The 175 number is 948 I think. I know it's in the 900 range, I've got one I can sell if your interested. ------------- 1950 B, 1952 pulling wd, and 1954 wd45 |
Posted By: DrAllis
Date Posted: 16 Nov 2015 at 2:44pm
| AGCO (Allis Gleaner Company) does not offer ANY 4 1/8" pistons and sleeves whatsoever for the gas G-226 or W-226. |
Posted By: 8070
Date Posted: 16 Nov 2015 at 3:03pm
| If I was doing this I go ahead and have head done to put all the same size vol in it or a little bigger ex in it help u a lot and get u a gov spring that a little bit shorter then the one u got or do like I seen on one here that pulled they use a e carb and gov so u could use a the throttle to control u rpms. All in what class u wanting to run in and what u can do. |
Posted By: jfrdiesel
Date Posted: 17 Nov 2015 at 5:34pm
| So the 175 engine kit is a direct fit? Is the best choice? I want to bump the compression ratio up some. The flat top pistons must have a shorter compressed height to be lower compression than the power crater. Thanks again |
Posted By: bigcountry48
Date Posted: 17 Nov 2015 at 8:03pm
|
I'm not sure what the best choice is, However the 175 kit sure is convenient and makes good horsepower. ------------- 1950 B, 1952 pulling wd, and 1954 wd45 |
Posted By: TramwayGuy
Date Posted: 17 Nov 2015 at 8:28pm
| Be aware that if the 175 'kit' includes main bearings, they will not fit your WD45. Only the pistons and sleeves. Not sure on the rod bearings. And to add to the information, the D-17s and 170/175 all ran faster than the WD45 which also added power. |
Posted By: DrAllis
Date Posted: 18 Nov 2015 at 8:02am
| A 175 overhaul kit does include all that extra stuff. A "Motor Kit" is just pistons and sleeves, rings, piston pins and rubber sleeve seals. |
Posted By: jfrdiesel
Date Posted: 23 Nov 2015 at 6:09pm
| Any idea of the compression ratio of a 4 1/8" bore flat top piston with a compressed height of 2.53"? |
Posted By: mattb
Date Posted: 23 Nov 2015 at 7:27pm
| I put flat tops in mine and they cced out 9.4 to 1 but be careful aftermarket arent all the same i think mine came from a and i, 210 psi compression |
Posted By: Charlie175
Date Posted: 23 Nov 2015 at 7:31pm
Same with mine. I think they were noted as "HC" ------------- Charlie '48 B, '51 CA, '56 WD45 '61 D17, '63 D12, '65 D10 , '68 One-Ninety XTD |
Posted By: Dan73
Date Posted: 23 Nov 2015 at 7:36pm
|
Try reading this thread from a little while back should answer alot of your questions. http://www.allischalmers.com/forum/forum_posts.asp?TID=113303&PN=2&title=indefinant-backorder-engine-kit-agco" rel="nofollow - http://www.allischalmers.com/forum/forum_posts.asp?TID=113303&PN=2&title=indefinant-backorder-engine-kit-agco |