Author Topic: Dellorto Carb colour/coating  (Read 839 times)

Online 1down5up

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Dellorto Carb colour/coating
« on: October 01, 2019, 06:44:29 PM »
All,

Anyone know an Aprox match for the green/grey of the dellorto carbs. I have a set of PHF's on a 850 lemans that were to grimy to clean up for a restoration, so they got the blast treatment.

I have had great success with painting carbs in the past, much easier to keep clean and non stained if you use the right paint.

Not sure of the original were painted or anodised.

Offline Antietam Classic Cycle

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Re: Dellorto Carb colour/coating
« Reply #1 on: October 01, 2019, 06:51:37 PM »
IIRC, it's an alodine/chromate conversion coating. Definitely not paint. Perhaps this would do the trick: https://www.pegasusautoracing.com/pdfs/Iridite-Instructions.pdf
« Last Edit: October 01, 2019, 06:57:09 PM by Antietam Classic Cycle »
Charlie
http://www.AntietamClassicCycle.com
'69 V700
'69 Ambassador
'71 Ambassador
'73 Eldorado
'74 850-T
'76 Convert
'77 Morini 3 1/2 Strada
'81 Ducati 500SL Pantah
'82 V50 III

Online 1down5up

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Re: Dellorto Carb colour/coating
« Reply #2 on: October 01, 2019, 06:54:25 PM »
IIRC, it's an alodine/chromate conversion coating. Definitely not paint.

Yes, I did think as much, scratches and stains fairly easily in my mind.

I wonder if anyone has attempted a colour match with a paint, and if so what colour they used.

Offline Tusayan

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Re: Dellorto Carb colour/coating
« Reply #3 on: October 01, 2019, 11:11:49 PM »
The original carbs on an 850 Le Mans (I, II or III) did not have the grey/green coating and were unpainted aluminum.  The coated carbs started with the Le Mans IV.

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Re: Dellorto Carb colour/coating
« Reply #3 on: October 01, 2019, 11:11:49 PM »

Offline Antietam Classic Cycle

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Re: Dellorto Carb colour/coating
« Reply #4 on: October 02, 2019, 08:40:42 AM »
Somehow my mind got stuck on the lovely yellowish/greenish hue as used on VHBs. Wonder how that happened.  :wink: :grin:
Charlie
http://www.AntietamClassicCycle.com
'69 V700
'69 Ambassador
'71 Ambassador
'73 Eldorado
'74 850-T
'76 Convert
'77 Morini 3 1/2 Strada
'81 Ducati 500SL Pantah
'82 V50 III

Offline wirespokes

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Re: Dellorto Carb colour/coating
« Reply #5 on: October 02, 2019, 09:07:31 AM »
I don't mind the gray anodized finish on the LM4 dells, but the ugly hoses coming off the float bowl breather ports, I do. One of these days I'll pull the copper tubes, drill the angled hole and plug the top where the copper tube went.

If yours had the anodized coating, then they probably had the smog lines off the float bowl ports also? I'll have to read again how you removed that coating - removing anodizing isn't easy, so maybe yours were coated some other way.

Offline geodoc

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Re: Dellorto Carb colour/coating
« Reply #6 on: October 02, 2019, 11:50:45 AM »
You can get Alodine (1201 for a gold cast and 1001 for clear) from Aircraft Spruce as well as the Alumaprep etching liquid:

https://www.aircraftspruce.com/catalog/cspages/alodine1201.php?clickkey=11999

I seem to recall that the bodies anyway are made from a zinc - aluminum alloy call Zamak. How it would work on that you'd have to test to find out.

https://en.wikipedia.org/wiki/Zamak





.
« Last Edit: October 02, 2019, 01:19:22 PM by geodoc »

pete roper

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Re: Dellorto Carb colour/coating
« Reply #7 on: October 02, 2019, 06:17:13 PM »
I don't mind the gray anodized finish on the LM4 dells, but the ugly hoses coming off the float bowl breather ports, I do. One of these days I'll pull the copper tubes, drill the angled hole and plug the top where the copper tube went.


Errrrr? That really wouldn't be wise. You know why those vents are there?

Offline wirespokes

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Re: Dellorto Carb colour/coating
« Reply #8 on: October 03, 2019, 12:57:09 PM »
Errrrr? That really wouldn't be wise. You know why those vents are there?
i do, Pete. The idea isn't to eliminate the vent, just the ugly copper tubes with hoses out the top. Put them back the way they used to be in the good old days. You know, drill the downward facing part of the vent, joining the main section heading into the float bowl. Close off the hole where the copper tube was eliminated.

The copper tube with hose was most likely the solution to capture any possible fumes out of the carb - a smog thing.

Offline Frenchfrog

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Re: Dellorto Carb colour/coating
« Reply #9 on: October 03, 2019, 02:09:11 PM »
...and also to stop shite getting in

Online 1down5up

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Re: Dellorto Carb colour/coating
« Reply #10 on: October 03, 2019, 04:14:02 PM »
i do, Pete. The idea isn't to eliminate the vent, just the ugly copper tubes with hoses out the top. Put them back the way they used to be in the good old days. You know, drill the downward facing part of the vent, joining the main section heading into the float bowl. Close off the hole where the copper tube was eliminated.

The copper tube with hose was most likely the solution to capture any possible fumes out of the carb - a smog thing.

And to stop staining/mess from the vapours, and to stop water getting in.


Offline wirespokes

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Re: Dellorto Carb colour/coating
« Reply #11 on: October 03, 2019, 04:40:50 PM »
The way those vents were originally designed, they were drilled close to the top side. Then a second drilling came up at a 45 degree angle connecting them. Nothing ever got in through the vent and definitely not water. Yes, the fuel vapors would cause a spot of guck around it after a while, but I'd find that much more desirable than the ugly copper tubing with another vent tube going up and over the carb. It's just a cleaner look.

 

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