Re: Vacuum Advance and why to use it on the street
 

Great question Eric. Fogive me that I don't know what the factory timing specs were on these engines. Did they have any emissions controls? I suspect I know why the VA may not have been utilized, but I am such a Day 2 guy that I honestly don't know how these were in stock form. I'll be the 1st to admit that my tunes aren't always the most "emissions compliant" as the OE's are required.

Re: Vacuum Advance and why to use it on the street
 

Don't have the time to teach?

Re: Vacuum Advance and why to use it on the street
 

I dont' want this going the wrong way here. Let's keep it civil.

Re: Vacuum Advance and why to use it on the street
 

For comparison's sake only, draw your own conclusions as you see fit.

Stats listed in distributor degrees and distributor rpm:

1111499 distributor:
0°-2.7° @ 500
3.2°-5.2° @ 625
8.5° @ 1000
16° @ 2500

Vacuum advance can # 1116201
0° @ 6" vacuum
7.5" @ 12" vacuum
=============================

1111295 Distributor:
.5°-3.3° @ 700
6.7°-9.5° @ 930
13.5°-15.5° @ 2500
12.7°-15.5° @ 3000

Vacuum advance--locked out
=============================

1111927 Distributor:
.5°-3.3° @ 700
7.5°-9.5° @ 930
14.5° @ 2500 (max)

Vacuum advance--locked out.

I'm done here.

I'm not looking to win any arguments, I'm simply trying to provide useful info.

Take it for whatever it's worth to you.

Re: Vacuum Advance and why to use it on the street
 

Useful info on today GAS with a hot camshafts...Vacuum advanve has to be limited. Useful info.