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Planning: Ford Model T

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Planning (pipe dreaming): 1927 Ford Model T sedan. I've done some calculations, but I need a reality check. One of the issues is the steps lead you to make assumptions- such as kWh/mi. I assumed 150 kWh/mi, which may be on the low side.

I'm shooting for a finished weight of 1300 lb, a 60 MPH top speed, 35-mile range, and normal acceleration. I'm liking the SepEx motor and controller package because I'd hope to set up regenerative motor braking, it seems like a good deal, but I don't know if that's enough grunt to do the job. The batteries would be Sears Diehard flooded lead acid deep cycle rated at 105 Ah based on 20 hours with a pack voltage of 84 V (motor is 60-84 V).

[You probably can't] See the attached spreadsheet. Okay, I pared it down and you can see the second version.

SepEx motor w/ Sevcon PowerPak controller: 425 A, 60-84 V, 25 hp, 4500 rpm, $1525.

Diehard 27M: 105 Ah, 57 lb, $95. 7-Pack: 84 V, $665, 400 lb.

What do you think?



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Discussion Starter · #6 ·
Are you planning to use the Model T suspension?

The Model T did not have front brakes from the factory. I would be concerned with driving freeway speeds without front brakes.

If you want to run a factory-ish chassis I would recommend stepping to Model A or later. The street rod and aftermarket support for them is much more refined. You can get hydraulic and disc brake bolt in upgrades for brakes and other such niceties.

Also as an "in the bones" type concern. Model T bodies are basically Sheet metal tacked to a wood structure. The wood structure is a time consuming restoration process. The Ford built Model A bodies is the transition to a metal structure with wood upholstery tack strips. Some of the model A bodies were outsourced to Briggs or Murry. These outsourced bodies were of the sheet metal over wood structure design like the T.

LOL I know too much detailed crap about the cars my grandfather drove.........
I don't have a body at this point, I'm not dead set on a Model T, and I need to learn more about them and others. I'll look into the wood issue, too. I'll likely end up with what I find that is lightweight and a good price. Or, I'll go with the early Ranchero I already have, which is fairly light, but even lighter seems better for an EV.

Yes to front brakes. There's a thread on the H.A.M.B. about adding front disc brakes to a Model T front axle.

And, overall I'm working on figuring out the main components, which is where I'd like additional comments.

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