This site is not affiliated with AGCO Inc., Duluth GA., Allis-Chalmers Co., Milwaukee, WI., or any surviving or related corporate entity. All trademarks remain the property of their respective owners. All information presented herein should be considered the result of an un-moderated public forum with no responsibility for its accuracy or usability assumed by the users and sponsors of this site or any corporate entity.
The Forum Parts and Services Unofficial Allis Store Tractor Shows Serial Numbers History
Forum Home Forum Home > Allis Chalmers > Farm Equipment
  New Posts New Posts
  FAQ FAQ  Forum Search   Events   Register Register  Login Login


Wd engine upgrades

 Post Reply Post Reply
Author
Message
Onalaska Ben View Drop Down
Bronze Level
Bronze Level


Joined: 15 Oct 2019
Location: Onalaska washin
Points: 16
Post Options Post Options   Thanks (0) Thanks(0)   Quote Onalaska Ben Quote  Post ReplyReply Direct Link To This Post Topic: Wd engine upgrades
    Posted: 15 Oct 2019 at 3:16pm
Good afternoon all. I'm new to the ac tractors. Got a 51 wd that needs an engine rebuild and wondering what combination of parts would be the best. Not looking for a pulling engine but something I can have fun with and improve the horsepower. I would still like to run pump gas. So far I can't find any ac guys in my area. Any help would be appreciated. Thanks.
Back to Top
Sponsored Links


Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 19360
Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 15 Oct 2019 at 3:37pm
Many WD's have had changes made to their engines over the last 70 years. Who knows what has already been done to yours?? Won't really know until you carefully tear it apart.  Your engine was originally 201 cubic inches ( 4 inch bore x 4 inch stroke) and had compression around 5.5 to 1 (100 psi) if it was a gasoline tractor. The WD-45 replaced the WD and had 1/2" more stroke for 226 cubic inches with 6.5 to 1 (120 psi) compression, a better intake/exhaust manifold, larger carburetor and larger air cleaner for an increase of 10 HP over the 35 HP WD. Checking the serial number behind the carburetor air hose might give you some information.  
Back to Top
Onalaska Ben View Drop Down
Bronze Level
Bronze Level


Joined: 15 Oct 2019
Location: Onalaska washin
Points: 16
Post Options Post Options   Thanks (0) Thanks(0)   Quote Onalaska Ben Quote  Post ReplyReply Direct Link To This Post Posted: 15 Oct 2019 at 5:35pm
Serial number is wd285114pa. It's already apart is 4" x 4". It dropped the head off a valve so it needs at least a sleeve rod and piston. Otherwise the engine was in great shape. By the looks of the engine I'd say it doesn't have many hours.
Back to Top
Sugarmaker View Drop Down
Orange Level
Orange Level
Avatar

Joined: 12 Jul 2013
Location: Albion PA
Points: 8166
Post Options Post Options   Thanks (0) Thanks(0)   Quote Sugarmaker Quote  Post ReplyReply Direct Link To This Post Posted: 15 Oct 2019 at 6:01pm
Ben,
 Welcome!
Cheapest way might be to just repair that one cylinder and have the head totally redone.
Might be in the under $500 zone. 
Complete rebuild with WD std components set aside $1500. That's if your doing the work. Double that if a good shop is doing the labor. Justy my guess art the costs. WD45 crank and components, add another $500-600.
 Regards,
 Chris

D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Allis F-40 forklift, Allis CA, Allis D14, Ford Jubilee, Many IH Cub Cadets, 32 Ford Dump, 65 Comet.
Back to Top
AaronSEIA View Drop Down
Orange Level
Orange Level


Joined: 11 Sep 2009
Location: Mt Pleasant, IA
Points: 2533
Post Options Post Options   Thanks (0) Thanks(0)   Quote AaronSEIA Quote  Post ReplyReply Direct Link To This Post Posted: 15 Oct 2019 at 7:48pm
Best cheap power add on option is to find a good WD45 crank and use WD45, D17, or 170/175 pistons.  Then you'd want the WD45 air cleaner and carb for proper air flow.
AaronSEIA
Back to Top
WF owner View Drop Down
Orange Level
Orange Level


Joined: 12 May 2013
Location: Bombay NY
Points: 4347
Post Options Post Options   Thanks (0) Thanks(0)   Quote WF owner Quote  Post ReplyReply Direct Link To This Post Posted: 16 Oct 2019 at 2:24am
Probably the least expensive power enhancement would be if you can find a set of good used M&W pistons.SP-46 were for the 4" stroke 201 and SP-48 for the 4.5" stroke 226. Both were overbore 4.125" .
Back to Top
Alex09(WI) View Drop Down
Orange Level
Orange Level
Avatar

Joined: 15 Mar 2012
Location: CECIL WI
Points: 1698
Post Options Post Options   Thanks (0) Thanks(0)   Quote Alex09(WI) Quote  Post ReplyReply Direct Link To This Post Posted: 16 Oct 2019 at 8:53am
To add power without spending a lot of money, ill second Aaron with using a wd45 crankshaft. You could then use the stock 4" bore wd45 (6.6:1), D17 (7.25:1), or 170 (8:1), or 175 (8.25:1) pistons to get anywhere from 45 to 55hp. If you have to get new sleeves also, consider getting the 4 1/8th sleeve piston set with the 7.25:1 comp ratio. Also consider a D17 governor spring instead on the WD one.

KEEP in mind: the pto gears are the weakest link when increasing hp from stock on a wd/wd45, so if you plan on using the tractor for pto work, don't go too "balls to the wall"
www.awtractor.com
A&W TRACTOR 920-598-1287
KEEPING ALLIS-CHALMERS IN THE FIELDS THROUGH THE 21ST CENTURY
Back to Top
Alex09(WI) View Drop Down
Orange Level
Orange Level
Avatar

Joined: 15 Mar 2012
Location: CECIL WI
Points: 1698
Post Options Post Options   Thanks (0) Thanks(0)   Quote Alex09(WI) Quote  Post ReplyReply Direct Link To This Post Posted: 16 Oct 2019 at 8:55am
and WELCOME TO THE FORUM!!!!
www.awtractor.com
A&W TRACTOR 920-598-1287
KEEPING ALLIS-CHALMERS IN THE FIELDS THROUGH THE 21ST CENTURY
Back to Top
Onalaska Ben View Drop Down
Bronze Level
Bronze Level


Joined: 15 Oct 2019
Location: Onalaska washin
Points: 16
Post Options Post Options   Thanks (0) Thanks(0)   Quote Onalaska Ben Quote  Post ReplyReply Direct Link To This Post Posted: 16 Oct 2019 at 1:14pm
If I was to use a farmall h 8.000" rod is there a piston that would have the correct compression height from the later engines that would give me the compression I'm looking for?
Back to Top
WF owner View Drop Down
Orange Level
Orange Level


Joined: 12 May 2013
Location: Bombay NY
Points: 4347
Post Options Post Options   Thanks (0) Thanks(0)   Quote WF owner Quote  Post ReplyReply Direct Link To This Post Posted: 16 Oct 2019 at 7:09pm
Originally posted by Onalaska Ben Onalaska Ben wrote:

If I was to use a farmall h 8.000" rod is there a piston that would have the correct compression height from the later engines that would give me the compression I'm looking for?

Why??? 

I know one of the premier AC guys that builds engines for tractor pulling, used Farmall H rods, but I believe the major reason is for clearance on engines that the stroke has been increased significantly (over 5" stroke). 

I have never heard of the stock AC rods in a 201 or 226 being a weak link. I think you are wasting your money.
Back to Top
Onalaska Ben View Drop Down
Bronze Level
Bronze Level


Joined: 15 Oct 2019
Location: Onalaska washin
Points: 16
Post Options Post Options   Thanks (0) Thanks(0)   Quote Onalaska Ben Quote  Post ReplyReply Direct Link To This Post Posted: 17 Oct 2019 at 11:03am
Wasn't worried about strength but was looking for a way to raise compression. I only have 3 good rods at this time so I'll need to get a rod core.
Back to Top
Stan IL&TN View Drop Down
Orange Level
Orange Level
Avatar

Joined: 13 Sep 2009
Location: Elvis Land
Points: 6730
Post Options Post Options   Thanks (0) Thanks(0)   Quote Stan IL&TN Quote  Post ReplyReply Direct Link To This Post Posted: 17 Oct 2019 at 11:30am
I would look for a good running WD45. You will save money and time and get an increase in power.
1957 WD45 dad's first AC

1968 one-seventy

1956 F40 Ferguson
Back to Top
Charlie175 View Drop Down
Orange Level
Orange Level


Joined: 11 Sep 2009
Location: Shenandoah, VA
Points: 6351
Post Options Post Options   Thanks (0) Thanks(0)   Quote Charlie175 Quote  Post ReplyReply Direct Link To This Post Posted: 17 Oct 2019 at 12:01pm
You will need a bigger carb on the WD if you want power.
That little stock one will hold you back.
Charlie

'48 B, '51 CA, '56 WD45 '61 D17, '63 D12, '65 D10 , '68 One-Ninety XTD
Back to Top
exSW View Drop Down
Orange Level
Orange Level


Joined: 21 Jul 2017
Location: Pennsylvania
Points: 914
Post Options Post Options   Thanks (0) Thanks(0)   Quote exSW Quote  Post ReplyReply Direct Link To This Post Posted: 04 Apr 2022 at 6:58pm
Instead of starting a new thread I'll piggyback on this one. How can you tell what mods a WD has had without teardown?
I brought one home and it does run well. The previous owner stated that the engine had been into and warmed up( nearly 50 years ago). It still has the WD manifold and zenith carb(that I've rebuilt).

Edited by exSW - 04 Apr 2022 at 6:58pm
Learning AC...slowly
Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 19360
Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 04 Apr 2022 at 7:07pm
An honest compression test would possibly reveal something. A regular WD engine will only have about 100 psi of compression. A WD45 will have 120 to 125 psi. A "scope" inserterdf thru a spark plug hole will reveal what the piston head looks like...flat top (WD) or smooth bowl (WD45) or heart shaped bowl (M&W overbore).
Back to Top
exSW View Drop Down
Orange Level
Orange Level


Joined: 21 Jul 2017
Location: Pennsylvania
Points: 914
Post Options Post Options   Thanks (0) Thanks(0)   Quote exSW Quote  Post ReplyReply Direct Link To This Post Posted: 04 Apr 2022 at 7:10pm
Delete

Edited by exSW - 04 Apr 2022 at 7:13pm
Learning AC...slowly
Back to Top
exSW View Drop Down
Orange Level
Orange Level


Joined: 21 Jul 2017
Location: Pennsylvania
Points: 914
Post Options Post Options   Thanks (0) Thanks(0)   Quote exSW Quote  Post ReplyReply Direct Link To This Post Posted: 04 Apr 2022 at 7:11pm
Originally posted by exSW exSW wrote:

Originally posted by DrAllis DrAllis wrote:

An honest compression test would possibly reveal something. A regular WD engine will only have about 100 psi of compression. A WD45 will have 120 to 125 psi. A "scope" inserterdf thru a spark plug hole will reveal what the piston head looks like...flat top (WD) or smooth bowl (WD45) or heart shaped bowl (M&W overbore).


Been wanting an excuse to buy a scope.... Plug right into my phone.
Learning AC...slowly
Back to Top
WF owner View Drop Down
Orange Level
Orange Level


Joined: 12 May 2013
Location: Bombay NY
Points: 4347
Post Options Post Options   Thanks (0) Thanks(0)   Quote WF owner Quote  Post ReplyReply Direct Link To This Post Posted: 04 Apr 2022 at 7:12pm
50 years ago is about the era that a lot of tractors were rebuilt with M&W sleeves and pistons for increased power.
M&W pistons had a heart shaped top.  One way to tell without a teardown would be with a borescope camera. I have one and i love it!
Back to Top
HudCo View Drop Down
Orange Level
Orange Level
Avatar

Joined: 29 Jan 2013
Location: Plymouth Utah
Points: 3236
Post Options Post Options   Thanks (0) Thanks(0)   Quote HudCo Quote  Post ReplyReply Direct Link To This Post Posted: 05 Apr 2022 at 11:25pm
what about the taller wd45 head ?
Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 19360
Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 06 Apr 2022 at 5:42am
Late model WD's had the taller head. Improves cooling but no real HP benefit.
Back to Top
Sugarmaker View Drop Down
Orange Level
Orange Level
Avatar

Joined: 12 Jul 2013
Location: Albion PA
Points: 8166
Post Options Post Options   Thanks (1) Thanks(1)   Quote Sugarmaker Quote  Post ReplyReply Direct Link To This Post Posted: 06 Apr 2022 at 7:25am
exsw,
 Better start a new thread on your work so far on your WD project!
We like pictures too!
Regards,
 Chris
D17 1958 (NFE), WD45 1954 (NFE), WD 1952 (NFE), WD 1950 (WFE), Allis F-40 forklift, Allis CA, Allis D14, Ford Jubilee, Many IH Cub Cadets, 32 Ford Dump, 65 Comet.
Back to Top
exSW View Drop Down
Orange Level
Orange Level


Joined: 21 Jul 2017
Location: Pennsylvania
Points: 914
Post Options Post Options   Thanks (0) Thanks(0)   Quote exSW Quote  Post ReplyReply Direct Link To This Post Posted: 18 Apr 2022 at 9:38am
Learning AC...slowly
Back to Top
DrAllis View Drop Down
Orange Level Access
Orange Level Access


Joined: 12 Sep 2009
Points: 19360
Post Options Post Options   Thanks (0) Thanks(0)   Quote DrAllis Quote  Post ReplyReply Direct Link To This Post Posted: 18 Apr 2022 at 10:12am
Looks like WD manifold, carb and air cleaner.
Back to Top
exSW View Drop Down
Orange Level
Orange Level


Joined: 21 Jul 2017
Location: Pennsylvania
Points: 914
Post Options Post Options   Thanks (0) Thanks(0)   Quote exSW Quote  Post ReplyReply Direct Link To This Post Posted: 18 Apr 2022 at 4:49pm
Originally posted by DrAllis DrAllis wrote:


Looks like WD manifold, carb and air cleaner.


Yep. No confusion here. '52 WD. Runs like a sewing machine. After 25+ years in a shed.
Learning AC...slowly
Back to Top
Phil48ACWC View Drop Down
Silver Level
Silver Level
Avatar

Joined: 17 Jan 2013
Location: Vermont
Points: 278
Post Options Post Options   Thanks (0) Thanks(0)   Quote Phil48ACWC Quote  Post ReplyReply Direct Link To This Post Posted: 20 Apr 2022 at 5:32am
I have a good WD-45 Crank Shaft I'd sell. $300 plus shipping. Shipping will be a killer from Central Vermont.
Back to Top
 Post Reply Post Reply
  Share Topic   

Forum Jump Forum Permissions View Drop Down

Forum Software by Web Wiz Forums® version 11.10
Copyright ©2001-2017 Web Wiz Ltd.

This page was generated in 0.078 seconds.


Help Support the
Unofficial Allis Forum