Quote:
Originally Posted by rich weyand
Gregski:
Looks like you have the vacuum advance hooked to timed vacuum, up on the side of the carb. That's pollution nonsense. I remember when it was introduced in 1968 together with AIR pumps and cats and all. The previous 30 years vac advance was always connected to full manifold vacuum. So hook the vac advance to full manifold vacuum. It's down underneath in the front by the PCV port (see Fig 7 on Page 7 of your carb instructions here: http://documents.holley.com/199r10331rev2.pdf). This will give you advance at idle (which you should have), and will allow a leaner mix at idle and keep the carb in the idle circuit at idle. You THINK it idles nice now. Move the advance line and you will see how good it can be. |
Rich believe you me, I fully intended to use full manifold vacuum (I may have even remembered an old post of yours) but when I looked at the Holley glossy page color instructions they showed three vacuum sources on the carb:
1. Full Manifold Vacuum source (Pump diverter valve or cruise control)
2. Full Manifold Vacuum Port (Power Brake or PCV)
3. Timed spark vacuum source (To distributor vacuum advance)
~ this be the one they skierd me into using ~
I just went back to look at my instructions again and that don't even look like my carburetor none, take a look at what would be page 3 (had they even numbered their pages)
http://documents.holley.com/199r10416rev.pdf
All in all I totally agree with you and will change my vacuum connection, thank you very much for your time to write down that advice.