Carb synch parts.

[Anonymous]

Does anyone know what thread size the little ports on intake boots are? M6?

Also, how much vacuum does each carb pull? Would a 0-30in Hg gauges work?

I just recommended http://www.mcmaster.com/ as a source for parts in another thread and thought I might just build myself a carb synch setup and was wondering about the thread size of those ports.

TIA

[duaneage]

I got a motionpro sync kit for 35 dollars from

http://www.casporttouring.com/

Easier and better than making something work. Does the job right.

[Mr. Jiggles]

I never tried measuring the heigth but I think that 8-10" is probably close. It shouldn't be too hard to make but finding elemental mercury might be difficult. At least I'd hope it would be.

[Anonymous]

I was thinking of getting 4 glycerin filled vacuum gauges so that I don't have to worry about the mercury.

The motion pro looks like a bargain, but I just know I will end up spilling that Hg all over the place and in California that is probably punishable by 3 points and revoking of your M1 license!

[bwringer]

The thread on those screws is 5mm diameter and the standard .80 pitch.

They take a 4mm hex key (allen wrench).

http://bwringer.com/gs/intakeorings.html

[alan]

Dennis Kirk has some little brass nipples that you can use to replace the Allen screws in the boots. You just leave 'em in. I got one of those allegedly "hookie" vacuum synch tools. The adapters that came with it won't fit up under the carbs, so I pulled one of the screws and it appears to be 5mm so that's what I ordered and knowing my luck it will be the 6's

[Anonymous]

Thanks for all the replies. As usual this forum is a wonderful resource!