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Re: Overdrive parts available soon

Posted: Fri Aug 11, 2017 7:41 pm
by Haf-e
VinceAtReal4x4s wrote:What major options does the Pinz have now?

Overdrive
Disc brakes
Wheel options
EFI
Ignition upgrades
New tops
Power steering
The list also left out:

Goatwerks 2.7 liter upgrade with custom cam
Lightened central driveshaft
CV jointed external driveshaft

Re: Overdrive parts available soon

Posted: Sat Oct 14, 2017 3:30 pm
by Wyothing
I would be interested also but it appears this may be above my knowledgebase to obtain the correct additional parts.

Re: Overdrive parts available soon

Posted: Mon Oct 16, 2017 5:44 pm
by 63rover
Just an update on the OD parts. The young machinist has changed shops (He has been hired by Arcelor Mittal Dofasco to their Hamilton, Ont. shop) and is also setting up his own private shop. This has caused some delays but the new rear transmission plate has been cut and looks great. I haven't rushed him but will nudge him this week about when he will get back at it to complete the proof of concept set so I can install and test it. Hopefully we can see these ready for winter project time.

Cheers, Clive

Re: Overdrive parts available soon

Posted: Tue Oct 17, 2017 12:08 am
by Brady 712k
I would also be interested in an OD setup for my 712K
I'm in the process of adding 6 disc brakes to it now..... an OD setup would really set it up nice!
Please keep us updated!
Thanks for the foot work!

Re: Overdrive parts available soon

Posted: Tue Oct 17, 2017 8:20 am
by 63rover
Will do Brady, Nice to meet you at the Vermont Overland. That's a great truck you have.

Cheers, Clive

Re: Overdrive parts available soon

Posted: Thu Oct 26, 2017 10:37 pm
by baremetalworks
Also interested in the OD parts for my 710m, thanks


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Re: Overdrive parts available soon

Posted: Wed Jan 31, 2018 9:20 pm
by Jake2015
What happened to the Test fit? Is this moving forward?

Re: Overdrive parts available soon

Posted: Wed Jan 31, 2018 10:20 pm
by 63rover
There has been a delay as my machinist friend had to relocate the shop mid project. The dust has settle and I hope to have him making more parts this weekend.

Cheers, Clive

Re: Overdrive parts available soon

Posted: Thu Feb 01, 2018 7:34 am
by TechMOGogy
Keep us posted Clive!

Re: Overdrive parts available soon

Posted: Wed Apr 11, 2018 9:57 am
by Haf-e
Was talking with a friend about overdrives and remembered that the late 80s corvettes had an interesting overdrive box added to the manual transmission - it was built by Doug Nash and is called a Nash 4+3.

Turns out two ratios were available - 0.68 and 0.60 and is basically a small 2 speed auto tranny - same as the Laycock type overdrive but beefier construction?

Several listed on eBay - looks shorter than the Laycock overdrives. Will try to find the actual length.

Re: Overdrive parts available soon

Posted: Wed Apr 11, 2018 12:09 pm
by TechMOGogy
Seems like it was controlled by a specific program in the Vettes - I guess you could eliminate that and just have a manual switch to engage/disengage it.
Early ones were known to be less durable than later model.
Fun find!

Re: Overdrive parts available soon

Posted: Wed Apr 11, 2018 1:57 pm
by Haf-e
Yes - had a crazy computer control to maximize fuel economy I heard that watched the coolant temp etc. People figured out how to bypass it for full manual control. Can't be used in first gear as it uses an internal hydraulic pump off the output for control. Just another possible somewhat compact option.

Re: Overdrive parts available soon

Posted: Wed Apr 11, 2018 2:09 pm
by Jimm391730
Personally, those overdrive ratios are much too tall for the Pinz - the TD tranny overdrive is 0.747 and it is taller than I feel would be best (I'd love a value closer to 0.80). In fact, an 0.80 external overdrive would allow spitting every gear except 4th (which would virtually match 5th w/o overdirve) and give 25-27% increments with each increase, although the higher torque in lower gears may limit how many gears down you can go. Maybe a custom gear set could be made for the Vette OD - it could almost certainly handle more torque than the Laycock.

Re: Overdrive parts available soon

Posted: Thu Apr 12, 2018 1:28 pm
by Derrickbwg
Those vettes were less than 250hp but torque was a little above 300ft lbs...puny by todays standards but i agree more robust more than likely than the laycock

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Re: Overdrive parts available soon

Posted: Sun Apr 15, 2018 5:03 pm
by 63rover
The Laycock units were used in Aston Martin and Ferrari too.