Limiting vac advance


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By Eddie Paskey - 16 Years Ago
Good Mornin' All;  Yeah I know we have been here before, but old age makes the brain not remember!!  Anyway-- need to limit my vac advance--  pinging on hill.  I have 57 dist. with petronics, dogleg advance. Do I turn the adjustment in or out to limit advance??  Do you guys think I need a MSD 6 system?   Have Petronics with their flamethrower coil.  Sure appreciate this foruum and Thanks in advance.    God Bless    Eddie
By bird55 - 16 Years Ago
Eddie, IMHO I used to have an MSD AL before I accidentally burned it up!. Anyway I liked it and felt like it improved my cars performance with "seat of the pant" tests. Idles seemed smoother and nicer acceleration. It all makes sense when you read what they do.

But That particular unit may be a little overkill as of now, you might want to check out the MSD Street Fire version. This one will save you some dough and does what YOU probably want without the race style hi-rev, Hi HP features.

But I also want to add if you keep your engine tuned properly with a pertronix, for the most part you'll be good to go. The 180.00 bucks for an msd could go to something else. Just some thoughts about it.



But I'll probably get one anyway!
By GREENBIRD56 - 16 Years Ago
Eddie - Turning the adjustment screw in -clockwise - (on the allen wrench adjustable can you are talking about) adds travel to the vacuum advance. It relaxes the spring load.

The reverse - turning the wrench counterclockwise - tightens the spring and resists travel.

On another thread - I saw a reference to a vacuum can with different spring characteristics, that was purchased from NAPA. That might also do you some good if the wrench adjustment of the can you've got, doesn't do the trick.  
By Eddie Paskey - 16 Years Ago
Hey Steve and Alan;   Thanks for the replies,  will get into it today.   God Bless    Eddie