[Fot] A-Type Overdrive Testing

[Bill Tobin]

Another variation on the saying: If you're going around it's both feet down.

Merry Christmas.

Bill

On 12/24/2019 7:00 PM, Greg Blake via Fot wrote:
> Whenever you start to spin it’s two feet in. I’ve been in a few 
> situations where other drivers have tried to save a spin by not 
> following this advice and they always come rolling across the track 
> backwards following an unpredictable path usually collecting a few 
> unsuspecting racers along the way.  Always go two feet in.
>
> Sent from my iPhone
>
>> On Dec 24, 2019, at 12:50 PM, David Gott <triumphsix at yahoo.com> wrote:
>>
>>  Speaking of spinning the OD backwards, which it won’t do, what 
>> happens if you spin the car while overdrive is engaged? Probably my 
>> biggest concern for running one of these in a race car...   I was 
>> thinking I’d use it on track and maybe autocross, but I think that is 
>> ill advised now that I bring up that question.   Has anyone ever spun 
>> and rolled backwards, with OD engaged?
>>
>> Dave G
>>
>>
>> Sent from Yahoo Mail for iPhone 
>> <https://overview.mail.yahoo.com/?.src=iOS>
>>
>> On Tuesday, December 24, 2019, 12:47 PM, Greg Blake 
>> <gblake58tr3 at icloud.com> wrote:
>>
>>     If this is for a race car, you might consider shiming the
>>     accumulator spring to get closer to 500psi.
>>
>>     Sent from my iPhone
>>
>>>     On Dec 24, 2019, at 10:51 AM, David Gott via Fot
>>>     <fot at autox.team.net> wrote:
>>>
>>>      I was able to test my overdrive by chucking a 1/2” electric
>>>     drill on the input shaft and turning the whole transmission.
>>>      (Make sure to spin the right direction!). Pretty sure I used
>>>     4th gear.   I was able to determine that my OD pressure is at
>>>     350 psi, so I’ll have to shim the spring I guess.
>>>
>>>     Secondary question; the OD seemed to stick on me, but I did not
>>>     have a load on the output flange, due to being on the bench; I’m
>>>     assuming this might be an issue?  Or would a load coax the OD to
>>>     releasing as appropriate?
>>>
>>>     Hopefully I don’t hijack your thread too much!
>>>
>>>     Thanks,
>>>     Dave Gott
>>>     62 TR4 (“A” type on the bench)
>>>
>>>     Sent from Yahoo Mail for iPhone
>>>     <https://overview.mail.yahoo.com/?.src=iOS>
>>>
>>>     On Tuesday, December 24, 2019, 11:25 AM, Jack Wheeler via Fot
>>>     <fot at autox.team.net> wrote:
>>>
>>>         I have tested overdrives like this for years.  My drive
>>>         motor only spins in one direction, which makes sure the
>>>         output shaft only spins in the same direction the shaft
>>>         would be spinning when the car is driven in a forward
>>>         speed.  Therefore, I don't know what would happen if you
>>>         spun it in the wrong direction.
>>>
>>>         Jack
>>>
>>>         On Monday, December 23, 2019, 10:05:53 PM EST, Glenn Franco
>>>         via Fot <fot at autox.team.net> wrote:
>>>
>>>
>>>         Merry Christmas
>>>         Quick Question
>>>         A friend of mine started testing his A-Type Overdrives by
>>>         back spinning the output flange (to the prop shaft) with a
>>>         pulley and electric motor.
>>>         I've seen this done by spinning the transmission INPUT shaft
>>>         with a pulley and electric motor but not from the rear.
>>>         Any chance of damaging the overdrive since the overrunning
>>>         clutch is only going to spin in the one direction, can it
>>>         lock up the overdrive?
>>>         Thanks in advance
>>>         Glenn
>>>
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