8 replies to this topic

[Tiny]

Thanks to ALX76 for finding this info with a great animation!

http://www.secondcha.../public/186.cfm

[TerrA LX]

If you look at senario 1 and compare it to senario 10 you will see that you need to have the highest possible vacuum possible.
This is obtained by advancing the dizzy till the vac guage stops comming up, usually you back it off a tad and see if it drops a little to ensure you haven't gone too far, check it and cross reference with a timing light, and then set the mixture the same way, this also helps with run on as you can get the idle screw in as far as possible. Rock the mixture screw as well to see you haven't gone too far too.
always, as recomended, set a base line for hot cams as they will give a lower vac reading due to the lumpy idle.
If it pings on setting it up this way i would assume you need higher octane fuel or your advance is comming in too soon or you have too much total advance dialed into your dizzy.

Edited by ALX76, 07 March 2007 - 07:05 PM.

[TerrA LX]

^ or should that read "idle screw out as far as possible" in other words the throttle will be as close to closed as possille whilst still enabling the car to idle.
This will allow the idle circuit to fully function and stop the carb pulling fuel from the main circuit.

Edit; i have found that you may have to go back and forth between the dizzy and the carb once or twice especially if the last tuner got it wrong.

Edited by ALX76, 07 March 2007 - 08:03 PM.