DavidM
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| posted on 4/1/07 at 12:17 AM |
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Gunson's Colourtune
I was thinking of buying one of these to keep the crossflow mixture adjusted, but are they reusable or are they use once and dispose?
David
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RazMan
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| posted on 4/1/07 at 12:22 AM |
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Are they still selling these? I had one of these in the 70's iirc. A glass topped spark plug so you can see the colour of the flame burn?
I would have thought a CO probe would be a better guide to see if you are running rich - or why not get it mapped?
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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mookaloid
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| posted on 4/1/07 at 12:23 AM |
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They are reusable but I have to say I find them very difficult to use.
I get better results tuning by ear.
Cheers
Mark
"That thing you're thinking - it wont be that."
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DIY Si
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| posted on 4/1/07 at 12:24 AM |
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Still available, and a brilliant home tuning aid. And yes, it's still a crystal spark plug. Reusable until you break the glass. Most useful when
you don't have any ( expensive? ) electrical stuff instead.
[Edited on 4/1/07 by DIY Si]
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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timex
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| posted on 4/1/07 at 12:25 AM |
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Has far as I know they are reusable! I was looking at them myself in halfords but opted for the Gunson`s digital CO% reader so that I can set the
carbs up for SVA 
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DavidM
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| posted on 4/1/07 at 12:32 AM |
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quote:
Originally posted by RazMan
I would have thought a CO probe would be a better guide to see if you are running rich - or why not get it mapped?
Don't think I could get it mapped, it's old school crossflow.
I just thought it would be a simple way of doing it. Have been doing it by ear but worry that I might get it too lean and melt something.
Does CO% reader do the same thing, and if so how much are they?
David
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RazMan
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| posted on 4/1/07 at 12:39 AM |
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It is worth remembering that the Colortune thingy will only allow you to set up the tickover mixture afaik - unless you can lean over to have a peek
when doing a power run ! 
You will only really melt something under full throttle conditions so a lambda / CO probe might give you a better idea about mixture under load.
Setting up carbs is often a 'seat of the pants' thing and changing a jet or needle position can make a hell of a difference.
[Edited on 4-1-07 by RazMan]
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
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DIY Si
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| posted on 4/1/07 at 12:44 AM |
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Yes, admittedly it will only set at low(ish) revs, but if the engine is near standard, as I think it is in this case, then it won't be far out
all the way up.
“Let your plans be dark and as impenetratable as night, and when you move, fall like a thunderbolt.”
Sun Tzu, The Art of War
My new blog: http://spritecave.blogspot.co.uk/
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timex
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| posted on 4/1/07 at 12:47 AM |
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This device just measures the Carbon Monoxide CO levels at the exhaust
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timex
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| posted on 4/1/07 at 12:49 AM |
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About £70-£80 tho
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DavidM
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| posted on 4/1/07 at 12:51 AM |
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Thanks fellas, being a bit "careful" with my money, I don't want to be splashing out on anything that won't make a
difference.
David
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macnab
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| posted on 4/1/07 at 01:26 AM |
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actually their quite tough.
I know this cos I once forgot to remove it and drove to halfords with it still fitted. 
Seriously, you should have seen my face when I opened the bonnet!!!
[Edited on 4/1/07 by macnab]
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macnab
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| posted on 4/1/07 at 01:28 AM |
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I'm out off here before I get slagged again
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scottc
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| posted on 4/1/07 at 01:30 AM |
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quote:
Originally posted by macnab
I'm out off here before I get slagged again
PMSL
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jollygreengiant
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| posted on 4/1/07 at 03:03 AM |
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quote:
Originally posted by DavidM
Thanks fellas, being a bit "careful" with my money, I don't want to be splashing out on anything that won't make a
difference.
David
Think Iv'e still got four (at least one, after my last i've got you can borrow). Great tool useful for setting up single and multi carb
installs AND you can use them throughout the rev range. Just hold the throttle steady at the revs you want to check and it will tell you when you look
down them what the fueling it doing, so you can make adjustments where necessary.
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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DavidM
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| posted on 4/1/07 at 08:10 AM |
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quote:
Originally posted by jollygreengiant
quote:
Originally posted by DavidM
Thanks fellas, being a bit "careful" with my money, I don't want to be splashing out on anything that won't make a
difference.
David
Think Iv'e still got four (at least one, after my last i've got you can borrow). Great tool useful for setting up single and multi carb
installs AND you can use them throughout the rev range. Just hold the throttle steady at the revs you want to check and it will tell you when you look
down them what the fueling it doing, so you can make adjustments where necessary.
Thanks Clive, that would be great.
David
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BenB
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| posted on 4/1/07 at 11:11 AM |
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Yup. I'd have to say it's a useful tool. HC was way off on the left bank at the first SVA test, used the colortune and it passed fine the
second time.... Worth the money in my book then....
A CO meter wouldn't necessarily have been as useful and I keep on chickening out of buying the full Krypton setup!
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DavidM
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| posted on 4/1/07 at 12:59 PM |
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There you go, this is what it's all about. I found out what I wanted to know and May even get a lend of the kit to do it.
Excellent.
Thanks everybody
David
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flange nut
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| posted on 4/1/07 at 01:34 PM |
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Hi David,
If Clive can't find his I'm sure I've got one in the garage.
Geoff
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jollygreengiant
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| posted on 4/1/07 at 02:18 PM |
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quote:
Originally posted by DavidM
There you go, this is what it's all about. I found out what I wanted to know and May even get a lend of the kit to do it.
Excellent.
Thanks everybody
David
Yep got one on my shelf next to the puter. Did have two but the elctrod on the second one has a broken ceramic.
[Edited on 4/1/07 by jollygreengiant]
Beware of the Goldfish in the tulip mines. The ONLY defence against them is smoking peanut butter sandwiches.
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