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PostPosted: March 7, 2021, 11:32 am 
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Yahshuatwo wrote:
Well.. not quite the fire sale costs on these old stock designs. Right under $1k is the goal from day one.Im taking a loss on these three so i can recoup funds for more equipment


Anyone know what happened to Ryan and the reverse boxes?


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PostPosted: March 8, 2021, 10:41 pm 
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Hello gto7419, i got your msg. Its been awhile with the gearbox. I was never able to bring it to market due to the oil leaks on the current design. I started on a two piece casing design ( to replace the leaking carbon fiber cover), but family life with three boys (youngest playing college basketball now) took up my spare time. Im a empty nester now, perhaps I can find the time.

With that all being said, I ponder asking for help or a design parnter to see the Rfalcon come to life. The box internals are strong (case hardened) and parts readily available; just need to foundry cast the aluminum two-piece casings. Machining from billet would be very expensive.

Ryan


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PostPosted: March 9, 2021, 12:54 pm 
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About the leaks between CF and the oring, you could epoxy an aluminum strip inside the edge of the CF, then use the oring between the aluminum bits. Just need to mill a bit more off the end caps.

Difficult to compete with a dirt cheap starter based reverse. Nothing about making a quality transmission is cheap.

_________________
Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS viewtopic.php?f=5&t=13225&p=134742
Simple Spring select viewtopic.php?f=5&t=11815
LxWxHt
360LA 442E: 134.5x46x15
Lotus7:115x39x7.25
Tiger Avon:114x40x13.3-12.6
Champion/Book:114x42x11
Gibbs/Haynes:122x42x14
VoDou:113x44x14
McSorley 442:122x46x14
Collins 241:127x46x12


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PostPosted: March 9, 2021, 4:20 pm 
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Hi,

Regarding the question of a reverse solution for BEC's, what about the Bert/Brinn/Falcon style of 2 speed boxes used for circle track? I've seen these for sale "used" from time to time. These weigh about 40 lbs, and may be narrow enough to fit in a slightly widened transmission tunnel. This could provide reverse gear, and also help with the issue of a very long drive shaft due to the distance from a longitudinally mounted bike engine all the way to the rear diff. Supposedly they are engineered for low rotating mass and low friction. The driveshaft behind the trans would be easy enough to implement. There would need to be a solution for the engine to front-of-trans connection.


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PostPosted: March 9, 2021, 6:19 pm 
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Those are basically stripped down 60-70s transmissions and definitely would work. Ccrunner used a T5 this way in his first build but later decided to pull it for a number of reasons.

_________________
Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS viewtopic.php?f=5&t=13225&p=134742
Simple Spring select viewtopic.php?f=5&t=11815
LxWxHt
360LA 442E: 134.5x46x15
Lotus7:115x39x7.25
Tiger Avon:114x40x13.3-12.6
Champion/Book:114x42x11
Gibbs/Haynes:122x42x14
VoDou:113x44x14
McSorley 442:122x46x14
Collins 241:127x46x12


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PostPosted: March 9, 2021, 9:49 pm 
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Miatav8,MstrASE,A&P,F wrote:
Those are basically stripped down 60-70s transmissions and definitely would work. Ccrunner used a T5 this way in his first build but later decided to pull it for a number of reasons.


Any idea why?


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PostPosted: March 9, 2021, 9:52 pm 
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Yahshuatwo wrote:
Hello gto7419, i got your msg. Its been awhile with the gearbox. I was never able to bring it to market due to the oil leaks on the current design. I started on a two piece casing design ( to replace the leaking carbon fiber cover), but family life with three boys (youngest playing college basketball now) took up my spare time. Im a empty nester now, perhaps I can find the time.

With that all being said, I ponder asking for help or a design parnter to see the Rfalcon come to life. The box internals are strong (case hardened) and parts readily available; just need to foundry cast the aluminum two-piece casings. Machining from billet would be very expensive.

Ryan


Hey Ryan,

Any chance you have an incomplete box without the carbon fiber? Have you thought about using a precision bent and tig welded piece of aluminum for the cover instead of billet? It might work?

-Danny


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PostPosted: November 27, 2021, 1:43 am 
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I vote cnc bend and weld, too. There should be plenty of job shops in Charlotte that would work on that.


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PostPosted: November 27, 2021, 7:59 am 
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gto7419 wrote:
Miatav8,MstrASE,A&P,F wrote:
Those are basically stripped down 60-70s transmissions and definitely would work. Ccrunner used a T5 this way in his first build but later decided to pull it for a number of reasons.


Any idea why?


Sorry of for the late response. This being a much smaller car than a locost and a fwd donor with no tunnel, less interior space and no room for a guibo as a cush drive with the T5, and problems with the design of the fabbed adapters/supports mounted to the T5 that resulted in vibration from no concentric ring on the output coupler and a bent input from a tapered cone tucked into the release bearing tube as the only support. Blazing your own trail can be unforgiving and expensive to fix after the damage is done. To be fair, this was about a decade ago.

_________________
Miata UBJ: ES-2074R('70s maz pickup)
Ford IFS viewtopic.php?f=5&t=13225&p=134742
Simple Spring select viewtopic.php?f=5&t=11815
LxWxHt
360LA 442E: 134.5x46x15
Lotus7:115x39x7.25
Tiger Avon:114x40x13.3-12.6
Champion/Book:114x42x11
Gibbs/Haynes:122x42x14
VoDou:113x44x14
McSorley 442:122x46x14
Collins 241:127x46x12


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