Quote:
Originally Posted by Gene F
...I have a 57, that was a 2-BBL. I changed it over last year to a tri-power. Read somewhere that the 4-BBL card had a different vacuum advance int he distributor. Any one konw anything about this? Any one konw anything about this? My car seems to run fine. ...
|
The '56 and earlier distributors operate the timing advance based only on a 0 to 5 inches of vacuum signal from the '56 & earlier carburetor(s).
Starting in '57 the distributors changed to having mechanical timing advance with a supplemental vacuum canister. Those need a carb vacuum signal of 5 to 20 inches of vacuum.
Not sure how you get the 'correct' vacuum signal for the '57 distributor from the presumably earlier three deuce setup,
or how much it matters...
I'll guess Sal knows....
scicala
.