Things are not as they first appear.

Way back when, before I actually started tuning, I played with my initial advance. I have one of the MSD timing controls and I would adjust my timing with that.

Seemed that the truck would idle smoother with a bunch of initial timing.

Now that I am really looking at things, they arent' as they seemed.

I pulled the most vac at idle with the timing set at the 4 degree (stock) setting. Even though the idle sounds rougher, it actually pulls more vac.

Don't get trapped in what you think works. Do what works!

 

Hmmm. Doesn't sound right to me. Are you sure you are reading vacuum in the right direction? Could you be saying pulls a harder vacuum by reading a higher MAP value, not realizing that lower MAP is higher vacuum?

It doesn't make sense to me. You'll have to show more data to convince me, and probably others.

 

Here you can se how my car responded to Idle timing https://www.thirdgen.org/techbb2/sho...hreadid=246142

/N.

 

Gee, what an interesting concept