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Thread: Recommendations for Stall Speed on Torque Converter

  1. #1
    Road Warrior Kodachrome Wolf's Avatar
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    Default Recommendations for Stall Speed on Torque Converter

    Essentially as the title states, whatís roughly the best estimate for a regularly driven car with the HO setup? Iíve seen numbers as high as 3000, which sounds like itíll hurt economy even more than normal.

    I know the factory AOD converter stalls around 1600-1800, and makes the car feel numb, but I expected that. Since mine has to come out, now is a good time to try and rectify that.

    Does a 2200-2500 stall converter sound adequate in a car our weight, or do I need to shoot a touch higher? Iíd like to keep a lock up converter for fuel economy, but I donít want to also wind up in a situation where the shift from 2-3 breaks the direct input shaft under WOT conditions.

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    P31 Pursuit Car Brown_Muscle's Avatar
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    The HO cam gets started around 2500rpm, so i think you are right in the ballpark with a 2200-2500 stall converter. Since it's not just a race car, i personally wouldn't go above that. Unless you got stuck with the short straw, your input shaft should be just fine with a stock HO motor.
    -Phil



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  3. #3
    I'm an air-conditioned gypsy gadget73's Avatar
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    2500 is about right for an HO cam. No point in making it much higher, you'd just be wasting power.

    Something that I found really made a difference to extend the low rpm torque was a ported lower intake. I used a Holley SystemMax 1 but its basically the same as a ported stock lower. Uses the stock upper intake. It evens out the airflow into the cylinders and made a much bigger difference on an otherwise dead stock HO than I'd have ever believed. You may get similar results out of a stock Explorer intake, I don't know.

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    Road Warrior Kodachrome Wolf's Avatar
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    Thanks y'all for confirming on that.

    Now I see there's plenty of options out there. Obviously I'm not gonna shoot for some eBay special to figure out how quick it doesn't work.

    Any thoughts on this? https://www.transdepot.net/tdaod2500lu

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    P31 Pursuit Car Brown_Muscle's Avatar
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    That was one i was looking at too. The transdepo in general doesnt have good reviews on its transmissions...however IDK how that compares to the quality of its parts. It is nice that it is brazed (i see a lot of B&M's are not)
    -Phil



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    P31 Pursuit Car Brown_Muscle's Avatar
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    Also, keep in mind that the HO motor doesn’t make a ton of power, so you will probably be at the lower end of the stall for that
    -Phil



    +1982 Ford LTD-S Police Car. 351w, GT40 Heads, Edelbrock 1906 Carb, Full exhaust headers to tails. 3.27 Trac-Lok Rear. Aluminum Police Driveshaft. Speedway Springs+Bilstein Shocks, Intermediate Brakes, Baumann Shift kit.

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    Road Warrior Kodachrome Wolf's Avatar
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    Quote Originally Posted by Brown_Muscle View Post
    That was one i was looking at too. The transdepo in general doesnt have good reviews on its transmissions...however IDK how that compares to the quality of its parts. It is nice that it is brazed (i see a lot of B&M's are not)
    Yeah, it took some hunting to get some info on the people themselves, but couldn’t find much on their converters.

    Someone on the CVN Discord pointed me towards Roadrunner Converters. I picked up their 2200-2600 Stall Converter instead. Seems they have pretty favorable reviews all around. They also have higher stall 10” models for AOD, but I figure I’ll be okay with one that’s getting onto the power band, even if it’s at the threshold.

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