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Looks like COX ,, but what is it / go to ??

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Looks like COX ,, but what is it / go to ??

Post  getback on Thu Feb 16, 2017 8:33 pm

Got these with some stuff and have been wanting to let ya'll ck. it out >> what is the plate for you reckon and what looks like a Thermo Hopper back /carb. plate extension ?? I was wondering what you think ? I Love This Forum!  

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Re: Looks like COX ,, but what is it / go to ??

Post  dckrsn on Thu Feb 16, 2017 9:25 pm

Bro Eric, the one on the left is gonna cause some sleeplessness tonight. No Smoking
Bob
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Re: Looks like COX ,, but what is it / go to ??

Post  Cribbs74 on Thu Feb 16, 2017 9:31 pm

Looks like some custom bits for Cox engines that were never finished.

The backplate looks like a stock unit that was ground flat. If you figure out a way to install a NVA to that venturi tube and drill a hole in the backplate it would make for a neat custom engine.


Last edited by Cribbs74 on Thu Feb 16, 2017 10:43 pm; edited 2 times in total
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Re: Looks like COX ,, but what is it / go to ??

Post  Mark Boesen on Thu Feb 16, 2017 10:25 pm

yep, i'd guess and say a homemade backplate and a machined down 5cc babe bee tank.
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Re: Looks like COX ,, but what is it / go to ??

Post  GallopingGhostler on Fri Feb 17, 2017 8:17 am

I'd say Ron and Mark are on track. It does appear that it was to be some sort of custom engine, with perhaps a custom carb / venturi, spacers between "tank" back and reed valve retainer front.
Without the designer machinist to vouch, whatever it is, got lost in the primordial twilight ether. What? Huh... Tired w/ Coffee Read sunny

Also wanted to add, getback, except as a display for exceptional oddly curious engine items, these days, drilling out the venturi hole in a Sure Start back (or buying one of the high performance ready-to-use from Bernie or Ex Engines) gives a lightweight NVA reed valve unit and mount.
Thus I see no technical advantage to those parts. Popcorn


Last edited by GallopingGhostler on Fri Feb 17, 2017 10:02 am; edited 1 time in total (Reason for editing : Added comment.)
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Re: Looks like COX ,, but what is it / go to ??

Post  KariFS on Fri Feb 17, 2017 1:03 pm

I also received a "custom" backplate once:



The venturi had been drilled out and a bit of a velocity stack shape could be seen too. An unknown nva was epoxied in a slot filed to the side of the venturi.

In the same pic there is an RC Bee cylinder that had had its bypasses enlarged. The guy who gave me these did not remember exactly how/if it ran, he said he did the mods in the early '80s Smile

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Re: Looks like COX ,, but what is it / go to ??

Post  getback on Sat Feb 18, 2017 7:48 am

Some good ideas , yes i think the po was in the process of making some sort of mock up rear venture ? The back plate may work for me with setting the pilot holes for mounting the engine . I didn't think about someone turning a BB tank down Embarassed Thanks Guys, if i do try and work a NVA into it i will post results Small Cox Logo
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Re: Looks like COX ,, but what is it / go to ??

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