[Fot] Adding type A OD

Sun Feb 25 17:56:21 MST 2018

Yes, Dale made the controller back in 2010. He sent me one for helping him with a description of the OD wiring on my A type. It does exactly as he designed it. Two bullet connectors and a ground.  Easy peasy.

Here’s the details from his email. I have no idea if the controllers are still available from him as it was eight years ago.

The details: The controller is a very small (less than 1 cu in) three wire
unit ( 2 bullet type connectors and a ground lug) and features two LEDs for
verification and troubleshooting.  Installation is straightforward and goes
between the transmission tunnel kidney pads.  The unit should work with all
overdrives, though right now I'm focusing on the TR250/TR6 A and J type.  The
controller works with existing components - no extra switches are required.
Operation of the overdrive is as before using the controller, but od is locked
from engagement whenever the transmission is shifted into neutral.  The
overdrive will not re-engage until transmission is shifted back into an
overdrive compatible gear ( 3rd or 4th - 2nd for A-type), and the overdrive
switch is cycled off then on (or just on if previously off). I'm currently
using this in my own TR6, and it makes a world of difference in the operation
of the overdrive - something the factory should have done from the beginning,
though the (practical) technology probably wasn't available at the time.

I've included some pictures of the controller at :
http://tinyurl.com/od-control

Any questions - please ask.  $45 plus shipping ($4.95  US).  Email at
od_cntl at hotmail.com - should also work with Paypal if you want to order -

Thanks for your time

Dale Osterndorf

Bud Rolofson

Extreme Parts Racing (more than just a haircut)

71TR6 CC57365 (Good 6)
71 Spitfire MK IV Race Car #3
69 Spitfire MK III (back up FE engine/dinghy car)
93 Minnie Winnie Race Support Vehicle 
77 Z-50A Hardly Davidson Honda Mini-Trail Bike (Triumph Pit Bike)

On Feb 24, 2018, at 7:32 AM, J.C. Hassall via Fot <fot at autox.team.net> wrote:

>  Amici,
> An electrical engineer friend, Dale Osterndorf (od_cntl at hotmail.com) designed a robust controller which accomplishes exactly what you’re looking for. 
> 
> NFI, etc.
> 
> jim
> 
> Fat-thumbed from my iPhone7
> 
> On Feb 21, 2018, at 10:26 PM, Greg Blake via Fot <fot at autox.team.net> wrote:
> 
>> Mike this is awesome, exactly what I was looking for. 
>> 
>> All of the other responses were informative as well. I love this group. 
>> 
>> Thanks. 
>> 
>> Greg
>> 
>> Sent from my iPhone
>> 
>> On Feb 21, 2018, at 12:30 PM, M&M Hado via Fot <fot at autox.team.net> wrote:
>> 
>>> Yes, it’s annoying to me, also, when you forget to manually turn off the overdrive and then have it engage when going back into gear.  There are at least a couple ways to have it drop out when passing through neutral.  Here’s what I think is the easiest and is what I have on my TR4A:
>>>  
>>> https://www.revingtontr.com/engine-transmission/gearbox/logic-overdrive-device
>>>  
>>> If you want to do it yourself, you can also make the same functionality with a couple of DPDT relays per the attached diagram that I made up a few years ago for my TR3B because I kept forgetting to manually turn of the O.D.
>>>  
>>> Mike
>>>  
>>>  
>>> From: Fot [mailto:fot-bounces at autox.team.net] On Behalf Of Steve Smith via Fot
>>> Sent: Wednesday, February 21, 2018 10:34 AM
>>> To: jwheeler1947 at yahoo.com; fot at autox.team.net
>>> Subject: Re: [Fot] Adding type A OD
>>>  
>>> I DO NOT like the on-off toggle switch for the OD's as I would downshift out of OD and forget to toggle the switch to off so I went back into OD as soon as the third gear switch was reengaged.  To combat this I used a standard electrical control scheme called "Three wire control" to engage the OD relay but drop it out when the shifter switch opened.  To re-engage overdrive a pushbutton would activate the relay and latch itself in so the pushbutton was just momentary.  Does that make sense?  I can do a drawing if not clear.   Steve
>>> 
>>> 
>>> 
>>> -----Original Message-----
>>> From: Jack Wheeler via Fot <fot at autox.team.net>
>>> To: Greg Blake via Fot <fot at autox.team.net>
>>> Sent: Wed, Feb 21, 2018 8:12 am
>>> Subject: Re: [Fot] Adding type A OD
>>> 
>>> For all of my 24 years of SCCA racing, I had the O/D switch mounted on my shift lever.  Very convenient, and allowed for faster shifting.
>>>  
>>> Jack Wheeler
>>>  
>>>  
>>> On Wednesday, February 21, 2018, 4:14:18 AM EST, Greg Blake via Fot <fot at autox.team.net> wrote:
>>>  
>>>  
>>> Looking for what Bosch relay I could substitute for the standard Lucas part number. Originally is not an issue as this is under the dash in my race car.
>>>  
>>> Also looking for advice on OD switch location for the race car. What do you guys like to use?  I was thinking a button on the steering wheel or on the shifter must be convenient.
>>>  
>>> Appreciate the ideas.
>>>  
>>> Greg
>>>  
>>> Sent from my iPhone
>>> _______________________________________________
>>> fot at autox.team.net
>>>  
>>> http://www.fot-racing.com
>>>  
>>> Donate: http://www.team.net/donate.html
>>> Archive: http://www.team.net/archive
>>> Forums: http://www.team.net/forums
>>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/jwheeler1947@yahoo.com
>>>  
>>>  
>>> _______________________________________________
>>> fot at autox.team.net
>>> 
>>> http://www.fot-racing.com
>>> 
>>> Donate: http://www.team.net/donate.html
>>> Archive: http://www.team.net/archive
>>> Forums: http://www.team.net/forums
>>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/gt6steve@aol.com
>>> 
>>> 
>>> <Overdrive Lockout Wiring.pdf>
>>> _______________________________________________
>>> fot at autox.team.net
>>> 
>>> http://www.fot-racing.com
>>> 
>>> Donate: http://www.team.net/donate.html
>>> Archive: http://www.team.net/archive
>>> Forums: http://www.team.net/forums
>>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/gblake58tr3@icloud.com
>>> 
>>> 
>> _______________________________________________
>> fot at autox.team.net
>> 
>> http://www.fot-racing.com
>> 
>> Donate: http://www.team.net/donate.html
>> Archive: http://www.team.net/archive
>> Forums: http://www.team.net/forums
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/jhassall@gmail.com
>> 
>> 
> _______________________________________________
> fot at autox.team.net
> 
> http://www.fot-racing.com
> 
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/levilevi@comcast.net

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://autox.team.net/pipermail/fot/attachments/20180225/27633a9d/attachment-0001.htm>