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Fun with Colortune

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Geo Hahn

Geo Hahn

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Just tried my new Colortune -- all in all I was quite satisfied with it and feel it did let me get even closer to an ideal mixture than the lift-the-piston method.

It could hardly be easier to use, the first photo show the basic set-up. The second photo shows the blue flame of ignition as seen looking down the tube.

It was at this point that I discovered that digital cameras really don't like to take pictures when you're holding them right next to a firing high tension lead... Yikes! Sort of scrambles their brains a bit. Fortunately no lasting damage was done and with a couple of tries from a more serene distance I was able to capture the result.
 
Thanks for posting this. As I've never seen a Colortune, I've always wondered what you actually "see" down there.

Just out of curiosity, how do you decide on the correct mixture from the color? Is there some kind of color map provided with the Colortune? Or are you just going for "light blue", or ...?

To my untrained ear/eye (and budget), it seems the "lift the piston and watch the rpm" technique could be a bit more accurate.

Thanks.
Tom
 
Orange = Too rich

Pale Blue or Whitish Blue = too lean

Bunsen Burner Blue = correct (though some may choose to be on the rich side of correct with bits of orange).

The lift the piston method can get pretty close (probably close enough) but I did move one carb 2 flats to get the ideal color.

I wouldn't try to set up carbs from scratch with this but makes an interesting second opinion plus lets you see mixture changes under different conditions (such as the effect of carb dampening oil on the mixture when accelerating the engine).

Mostly I just like a peek at what's really going on, but then I'm the one who made the 'Visible Distributor':

https://www.geocities.com/tucson_british_car_register/The-Visible-Distributor.html
 
:lol:

You guys are comin' late to this party. :smile:

I've two of the ColourTune tools, much easier to compare twin carb setups that way. I've used 'em for years on about anything wot came thru the shop. Set the carbs up first with UniSyn and bench settings for the jets, then use the ColourTune to tweak.

As for the EeziBleed; we were usually a two-man shop and both busy, so brake and clutch purging effectively "crippled" us until I got one. Makes bleeding hydraulics a one man job, and it's quicker too. :thumbsup:
 
CinneaghTR said:
Can you recommend a good place to purchase a Colortune? Jeremy
Click to expand...
Eastwood sells them for $70. An internet search may turn up some others. I got mine on ebay. They don't really 'wear out' so you can get a good used one. Make sure all the adapters are there.
 
I, too, got it on eBay -- there was a guy regualarly selling them there. At that time it was 56.95 + 6.60 shipping.

EBay seller was 'autoexpertproducts' so one could search for his items.
 
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