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12-18-2019, 01:34 AM | #21 |
Senior Member
Join Date: May 2010
Location: now Kuna, Idaho
Posts: 3,779
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Re: Power Steering for AA Truck
Well, if you stick with the "ArmStrong" steering you have now, you'll save big bucks by not needing a gym membership!
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12-18-2019, 02:40 PM | #22 |
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Join Date: Aug 2016
Location: Avesta, Sweden
Posts: 69
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Re: Power Steering for AA Truck
Wow, what a fabulous response from all of you My AA is fully restored and the steering box and all suspension and steering components are rebuilt. When I jack it up, I can turn (not rotate)(yes that too) the front wheels easily and the steering wheel spins. It's definitely lubricated, so there are no problems with the truck being old and stuck. I have desided to install a F100 steering box. The worm and roller type will give less friction and 18:1 ratio over 15:1(I hope those numbers are correct) will probably be enough to make me happy. If not, I will instal an electric PS under the dash later. Again, thank you all! |
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12-18-2019, 04:33 PM | #23 |
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Join Date: Aug 2016
Location: Avesta, Sweden
Posts: 69
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Re: Power Steering for AA Truck
I checked the A Forum and found that the AA steering box ratio is 13:1, not 15:1 as I mentioned. Close to 30% less resistance from the steering wheel and probably even better with the F100 box This is PS ..... |
12-19-2019, 03:58 AM | #24 |
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Join Date: Aug 2016
Location: Avesta, Sweden
Posts: 69
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Re: Power Steering for AA Truck
The ratios are a bit confusing. The information on the net is varreing as usual, but 13:1 for model A and 18:1 for F100 seems to be the most common values. But I take it for granted that the information from Randy Gross is correct, raising the improvement to 35%. It can't be any need for power steering after this! Chris; A F100 box has a 17 to 1 ratio A standard 2 tooth or 7 tooth Model A box has a 11 to 1 ratio Thanks Randy Gross Mel's Model A Parts & Services 904 North 3rd Street Montebello, CA 90640 (714) 292-8660 |
12-19-2019, 04:26 AM | #25 |
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Join Date: May 2010
Location: Solihull, England.
Posts: 8,750
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Re: Power Steering for AA Truck
The big thing which overrides the actual ratio is the efficiency. The roller segment helps a lot. As the cars got bigger and heavier even Ford went over to the roller segment boxes starting in 1937.
Mart. |
12-19-2019, 05:56 AM | #26 |
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Join Date: Aug 2016
Location: Avesta, Sweden
Posts: 69
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Re: Power Steering for AA Truck
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Very true Mart and I mentioned that too. The steering boxes of ball screw type are even more efficient, but it doesn't seem to be any of that type, that will fit reasonably well. Chris Last edited by xelhan; 12-19-2019 at 09:26 AM. |
12-19-2019, 02:40 PM | #27 |
Senior Member
Join Date: Jul 2019
Location: Southern Oregon
Posts: 782
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Re: Power Steering for AA Truck
I haven't done it yet but, my plan for my F3, is to use a double acting cylinder on the drag link to frame and then using a servo, from a stock car or Sprint car, on the steering shaft, connected to the power steering pump and then to the cylinder.
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