carb tuning ?s

Mulvaney · 6/13/12, 10:36 PM

any info on how to set my vacuum on my carbs would be greatly app. one carb has 18 at 2000 rpm and another one has 8 and if you birp the throttle it drops at first haven't even got to the other two yet. thanks

TQ29m · 6/14/12, 4:52 PM

Are you talking about engine vacuum, on each carb? As I recall, each carb has it's own idle adjustment, so you would use that to set each individual one to some "magic" number, if that is the vacuum you're referring to. Bob!

DAD · 6/15/12, 3:49 PM

It takes a special mercury manometer to do what you are trying to do, probably m/c shop has one hidden someplace. If you are planning to be at idle for a long period of time might want to do this at, WOT it doesn't make any difference. Just set your idle up to where it keeps runing and go. Why don't you load car up and come up to Btown Sat night?

Honest Dad himself

TQ29m · 6/15/12, 4:51 PM

They aren't all that expensive, I just bought a manometer, to use for cking filter restriction, $27.00, free shipping, and I've seen the carb type for about the same money, somewhere, but they are out there. You can still buy the carb balance outfit, that allows you to hook up to the spigot on the carb boot, and do all 4 with one run, or you could use the type I bought, and do them one at a time. Bob!

DAD · 6/20/12, 10:27 AM

I got one of them 4 hosers made by Motion Pro I would like to sell for $75.00. Only used twice. You can get idle spot on but it sure aint quick. Every time you adjust one throttle plate the other three change and you go back and do it again and again.

Honest Dad himself

6/13/12, 10:36 PM	carb tuning ?s	#1
Mulvaney Member Join Date: Jul 2011 Posts: 136	any info on how to set my vacuum on my carbs would be greatly app. one carb has 18 at 2000 rpm and another one has 8 and if you birp the throttle it drops at first haven't even got to the other two yet. thanks

6/14/12, 4:52 PM	Re: carb tuning ?s	#2
TQ29m Senior Member Join Date: Aug 2008 Posts: 1,947	Are you talking about engine vacuum, on each carb? As I recall, each carb has it's own idle adjustment, so you would use that to set each individual one to some "magic" number, if that is the vacuum you're referring to. Bob! __________________ "Being old, isn't half as much fun, as getting there"! Ole Robert I!

6/15/12, 3:49 PM	Re: carb tuning ?s	#3
DAD Senior Member Join Date: Aug 2009 Posts: 1,245	It takes a special mercury manometer to do what you are trying to do, probably m/c shop has one hidden someplace. If you are planning to be at idle for a long period of time might want to do this at, WOT it doesn't make any difference. Just set your idle up to where it keeps runing and go. Why don't you load car up and come up to Btown Sat night? Honest Dad himself _________________________________________________ Last edited by DAD; 6/15/12 at 4:17 PM.

6/15/12, 4:51 PM	Re: carb tuning ?s	#4
TQ29m Senior Member Join Date: Aug 2008 Posts: 1,947	They aren't all that expensive, I just bought a manometer, to use for cking filter restriction, $27.00, free shipping, and I've seen the carb type for about the same money, somewhere, but they are out there. You can still buy the carb balance outfit, that allows you to hook up to the spigot on the carb boot, and do all 4 with one run, or you could use the type I bought, and do them one at a time. Bob! __________________ "Being old, isn't half as much fun, as getting there"! Ole Robert I!