Colortune, is it needed?

[trent]

Please forgive me for reviving an old thread, but I just ordered a colortune to work on my 83 850 and I discovered post-purchase that the colortune doesn't work as well for CV carbs.

Based on what chuck hahn says above, with CV carbs you're not looking for the blue flame but rather when the flame just appears + 1/2 turn? Just want to confirm you're not looking for color since you don't mention it?

I bought colortune years ago and never used it, was thinking about seeing if anyone wanted it...Can't remember what I paid for it.

[Who Dat?]

Based on what chuck hahn says above, with CV carbs you're not looking for the blue flame but rather when the flame just appears + 1/2 turn? Just want to confirm you're not looking for color since you don't mention it?

That is correct. I have seen a couple sets of CV carbs that showed differences in color, but MOST of them will just show the blue flame slowly puttering out, then stopping, as you turn the mixture screw IN. When you start to turn it OUT (SLOWLY), you will see the blue flame start puttering back in, then going steady. Add about 1/2 a turn more, as Chuck says. That will definitely get you in the ballpark.

[93Bandit]

I bought colortune years ago and never used it, was thinking about seeing if anyone wanted it...Can't remember what I paid for it.

Bummer, would have probably been easier to get from you rather than waiting for it to ship from the UK. Mine finally arrived today.

[93Bandit]

That is correct. I have seen a couple sets of CV carbs that showed differences in color, but MOST of them will just show the blue flame slowly puttering out, then stopping, as you turn the mixture screw IN. When you start to turn it OUT (SLOWLY), you will see the blue flame start puttering back in, then going steady. Add about 1/2 a turn more, as Chuck says. That will definitely get you in the ballpark.

Perfect, thank you!

[chuck hahn]

To correct Cowboys post, i think he meant TUNE carbs not sync them. Syncing requires vacuum guages. AND just an FYI. If you use those blue emgo guages be sure to sync the neeles first. Get a few vacuum tees and hook all 4 dials to a single vacuum port. Remove the front lenses and theres a slotted brass screw on the dial faces. Set all 4 dials the same and then youre assured an accurate syncing. And yes they are actually very good syncers