IDEAL RPM 28 AA WITH 5:17 REAR

AA Ford Discussion Group relating to the repair and restoration of your AA Ford.
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birdacre
Posts: 295
Joined: October 8th, 2013, 2:37 pm
Body Type: AA express
Model Year: 1928

IDEAL RPM 28 AA WITH 5:17 REAR

Post by birdacre » September 2nd, 2017, 1:24 pm

i have studied the RPM chart neil has out. i have recently got my AA on the road. it has a four speed. what is the "limit" in your opinion for traveling on a secondary road. are there any folks that keep the speed at 40 for 5 minutes or so. according to the chart maybe 2600 RPM's at 41MPH. will this hammer the Babbitt to shreds? what do any veteran AA folks find? I listed my specs in subject. would love to know if it is ok to keep it at 40 for prolonged periods. it does not sound bad at this speed, but sounds can be deceiving. INPUT ????

KimVanOrder
Posts: 382
Joined: August 11th, 2013, 4:25 pm
Body Type: 82-A Platform
Model Year: 1928
Location: Hamilton, Mich.

Re: IDEAL RPM 28 AA WITH 5:17 REAR

Post by KimVanOrder » September 2nd, 2017, 3:50 pm

if it is not shaking and or knocking you should be good. With a non-counter balanced crank you'll know by the shaking it is too fast.
KVO
Dec. '28 AA

Stakebed
Posts: 1076
Joined: June 14th, 2007, 7:29 pm
Body Type: Grainbox
Model Year: 1929
Location: Illinois

Re: IDEAL RPM 28 AA WITH 5:17 REAR

Post by Stakebed » September 2nd, 2017, 10:08 pm

Most people travel 35-40mph. Think of the AA as a Clydesdale VS racing horse standard model A.... :)

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