I think it's 3/32"... One thing to note, on the cans that I've recently gotten if you "dial" them it changes when they come in but also it modifies how much advance you get out of it...the last one I "adjusted" came in a bit too late, after dialing it in, it came in just right, but instead of getting the 20 degrees of adv. I wanted, I only get 17.... (not sure if the extra 2-4 degrees would make any more mpg on I-5...)


Good luck,

-D.Idiot

So last night on the way home I stopped at Harbor Freight and picked up a dial timing light. I have been having a timing issue for quite a while. it turns out that the vacuum advance pod on my distributer is always advancing the timing. I set it to 0* reved it to 2000rpm and I was getting 50* , disconnected I was getting 25* so I guess I have 2 options
1. I can just set it to 4* initial and disconnect the vac advance for racing and get another distributer later OR
2. see if anyone has an idea of how to get the distributer to give me less mechanical advance so I can give myself more inital advance.
I am going to be racing one week from today.
I also spent a couple hours inside my Holley last night. it was surprizingly clean. I wasnt really looking to rebuild I just wanted to replace the gaskets, bowl gaskets and the gaskets around the secondary metering block. I found out I have 57 jets. I had a small leak somewhere that is now gone. I also got the secondary spring quick change kit. I have a lot of pump cams I have to figure out which one I need.
Now today I am going to replace the idler arm and all 4 tie rods. Wednesday it goes in for an alignment.

To set the can to advance at higher vacuum you turn it clockwise right? mine is maxed clockwise.

Quote:
Did they make 12R goveners?


It's possible, I have a 13R unit

I really need a vacuum tester. I dont know how much vacuum I am generating or what it takes to work the advance canister.

That's weird........

unless you can't produce enough vacuum to get the 20.

The screw adjustment shifts the can's range. If vacuum started at 5in and maxed out at 10in, when you adjust the screw, the 5 inch spread stays. So if you get it to start at 10in, it would max out at 15in.

I took it apart last night and found it has a 15r governor I have to pull the one I am running to swap in a spring then I can reassemble and go from there. the advance pot on the reman dosen't have any indication of what it is. Slant6Ram sent me a 9r governor and an 11R vacuum pot that I am going to use that should allow me to set my inital at around 10-12*.