Load-O-Matic Distributor Spark Advance Valve question

[Anonymous]

I have a 1961, 144 cui. engine, with a Holley 1909 carburator.

I have noticed that my ignition timing advance reacts too quickly, and I
suspect the Spark Advance control valve on the carburator is not up to
spec.

I do have a new Spark control valve from a rebuild kit for an Autolite
carburator CFOF-F, a carburator typically found on a Ford Mustang 200
cui. engine.

Question: Is the spark control valve the same for a Holley 1909 Carb.
vs. an Autolite CFOF-F??? They look exactly the same, but I'm not sure
if there is some internal differences.

Any input on this is greatly appreciated. Thanks.

 

[addo]

I've never seen a difference noted, but that doesn't count for much! Are you able to increase return spring tension slightly (or renew it), to see if that changes the outcome?

 

[Anonymous]

Thanks for the reply, but I may have been ahead of myself:

My distributor vacuum advance diaphram was blown on the car when I
bought it. So, I went to NAPA and they sold me one for about $17.00 -
that was last year, before their web-site was functional.

Yesterday, I went on their site, and under 1961 Falcon, they listed a
dist. vac. dia. NAPA Part number ECHVC915. That is what they sold
me last year - but their site now says, FOR MANUAL TRANSMISSION
ONLY. I have an automatic transmission, and they have no part listed
for a 61 Falcon w/automatic transmission.

I may have the wrong Vacuum Diaphram on my engine.

To further compicate things, I looked under 1965 Mustang. w/ 200 cui.,
NAPA listes the same part, but does not say for Manual transmission
only - lists same part for both manual or automatic transmission.

Anyone know anymore on this? Greatly appreciated, again.