fwa vs twd
Printed From: Unofficial Allis
Category: Allis Chalmers
Forum Name: Farm Equipment
Forum Description: everything about Allis-Chalmers farm equipment
URL: https://www.allischalmers.com/forum/forum_posts.asp?TID=134589
Printed Date: 18 Jul 2025 at 4:15am
Software Version: Web Wiz Forums 11.10 - http://www.webwizforums.com
Topic: fwa vs twd
Posted By: 19856020
Subject: fwa vs twd
Date Posted: 02 Feb 2017 at 2:36pm
hope im not beating a dead horse with this question, but what if you had (for example) an 8050 fwa pulling the correct size chisel plow, and an 8050 twd pulling a smaller plow - throttle back a litte - could you get the same amount of work done using the same amount of fuel only more time  ------------- 716 917 918 1920 d17 6080 |
Replies:
Posted By: victoryallis
Date Posted: 02 Feb 2017 at 2:52pm
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Depends on soil conditions ------------- 8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760 |
Posted By: Tenn allis
Date Posted: 02 Feb 2017 at 3:46pm
| Most efficient is gonna be fwa no matter conditions I only time not as efficient as if your cutting hay or baling when you don't need fwa personally I wouldn't buy anything but a fwa anymore |
Posted By: Dswall
Date Posted: 02 Feb 2017 at 7:09pm
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More Acres per hour usually calculates to better fuel efficiency ------------- Dustin in CA |
Posted By: Allis dave
Date Posted: 02 Feb 2017 at 8:19pm
| Better fuel economy because all the power goes to the ground instead of lost to slippage. |
Posted By: CrestonM
Date Posted: 03 Feb 2017 at 10:29am
x2 Allis actually did tests on 2wd vs FWA for the customers showing the advantages and fuel saving of FWA, and they even offered free FWA for a while. I forget what model 8000 series (I think 8070) with FWA could do as much work as a 4W220, but on less fuel.
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Allis dave wrote:Posted By: victoryallis
Date Posted: 03 Feb 2017 at 11:03am
I see the 8070 using less fuel but call bull on being able to do the same work my 8030 MFD dualed up will spin out before my 7580 does. ------------- 8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760 |
Posted By: Allis dave
Date Posted: 03 Feb 2017 at 11:25am
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An 8070 is 3000lbs heavier than a 8030. I think a big part of the sales argument was that the 8070FWA cost less than the 4WD tractor and could do almost the same job. It should do almost the same as they're the same HP. Now we're back to Allis old sales pitch of pulling smaller implements faster. Depends on what you're really doing for hard tillage I suppose. I'm a big 4WD fan though. They float so much better and have so much more pull to get through wet spots and all that weight and stability is nice on a grain cart too. But now we're digressing from the original question... |
Posted By: jiminnd
Date Posted: 03 Feb 2017 at 11:38am
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Not set up properly but when Magnum came out we had a demo, fwd we had on a disc, rum in twd and them flip the switch to fwd, unbelieveable but no duals so a twd with duals would make a difference. ------------- 1945 C, 1949 WF and WD, 1981 185, 1982 8030, unknown D14(nonrunner) |
Posted By: victoryallis
Date Posted: 03 Feb 2017 at 7:28pm
True but my 8030 has radial 20.8's that are loaded and the 7580 has empty 18.4's bias tires. We have a J&M 875 grain cart I can put 2/3 of a load in it and the 7580 will drag it places I would be afraid to drive a 4wd pick up. ------------- 8030 and 8050MFWD, 7580, 3 6080's, 160, 7060, 175, heirloom D17, Deere 8760 |
Posted By: Tbone95
Date Posted: 04 Feb 2017 at 6:33am
I've noticed this phenomenon too, but you're also pushing different tires and a heavier front end through the dirt than a 2wd would be in that case. |
Posted By: 19856020
Date Posted: 05 Feb 2017 at 9:24am
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thanks for all replies but still wonder if one could get same work done on same amount of fuel using a two wheel tractor w radial duals in ideal conditions pulling a much smaller implement ? . no question that fwd always better!! . p.s. my dad let me skip school the day they demo'd 6000/8000 fwd they pulled a big disk w 8050 flipped switch on amazed everyone , almost converted the landowner from red to orange,also remember at one point that big disc was hooked to 6080 fwa to move to another field we put it in the ground just for fun and it blew everyone away that it could pull it no prblem ------------- 716 917 918 1920 d17 6080 |
Posted By: jwal10
Date Posted: 05 Feb 2017 at 11:49pm
| 125 hp is about the break point here. Over needs a lot more weight at max load, using a lot more fuel. At 125 hp, weighted light and gear higher was more efficient. 5 bottom plow, singles, in furrow was a lot more efficient than weighted heavy, duals, 4wd and onland pulling 6 bottoms. If powering around corners like seeding, duals and 4wd worked well as the 4wd pulled you right around, not having to use brakes. Medium load throttled back 200 rpm....James |
Posted By: GM Guy
Date Posted: 19 Feb 2017 at 11:57am
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I think the figures for the FWA are the Gallons per Hour figure is higher due to the reduced efficiency due to drag in the drivetrain, but the Gallons per Acre figure is more efficient due to the increased traction.
We either own 4wds or 2wds, only if they can be bought cheap will we own FWAs, they are nice for some applications, but IMO the high cost of repairs offset any gain for us. ------------- Gleaner: the properly engineered and built combine. If you need parts for your Gleaner, we are parting out A's through L2's, so we may be able to help. |