Carb sync tool

[Nessism]

I also have BOTH the "new" Motion Pro & the Carb Tune tools - they both work well, but as you say, the Carb Tune is easier to use. A couple other advantages of the Carb Tune:

- Since it doesn't use fluid, there's nothing to accidently suck into the engine when over-rev'ing, or sync'ing at elevated RPM's.

- No need to "standardize" the fluid heights between each column, with every set of carbs - the rods are already calibrated, & they never change.

Hey Mike,
There is no calibration with the old mercury type type. How do you "standardize" the new type Motion Pro unit with the blue fluid?

Regarding the Carb Tune, one guy here said the unit needs to be calibrated to one vacuum source so was that bad info?

[Guest]

Hey Mike,
There is no calibration with the old mercury type type. How do you "standardize" the new type Motion Pro unit with the blue fluid?

Regarding the Carb Tune, one guy here said the unit needs to be calibrated to one vacuum source so was that bad info?

The Blue Motion-Pro unit has to be standardized every time by attaching the hoses one-at-time to the same carb vacuum - then use the adjustment screw at the bottom of each column to raise/lower the fluid heights so they all start at the same level/value...

The Carb Tune has no adjustments to tweak (at least none you're supposed to mess with) because the weights of each rod have already been balanced from the manufacturer.

[Don-lo]

With mercury stix, the pool of liquid is vented, so the vacuum is raising the weight of the liquid (and mercury is very heavy, so it is the most stable). With this vf forum tool, there is no venting. Since liquids do not compress, how do the lines move? The plastic hoses themselves are collapsing, allowing the fluid to move upward. It's a neat idea, since it will be automatically leveling. I don't see how it can draw the fluid up to the engine unless a leak occurs in a bottom tee, or they use extremely thin tubing. The setup should be self dampening too, so the restrictors shouldn't be needed (lol, they seem to think the restrictors will keep fluid out of the motor)