11 to 1 - too much on CA 91 pump gas?

[Excaliber]

And ONE POINT of octane boost is 1.0- NOT .1

Who says so Chas? Is that some kind of Government regulated standard or something? Perhaps they mean MON octane instead of RON octane? Booster bottles can say whatever they want and do!

It could be 1 or .1, either way, it's fair game for the bottle to say it raises octane by a "full point", whatever that is. Not to mention there are a number of separate international standards when it comes to octane ratings.

Consider a couple of typically available boosters. Like "NOS", which claims a 7 point increase (and pigs fly). NOS is one of the best available! Tests show it actually does raise the RON by 1.8 points. Hardly a "7" point increase, but perhaps "NOS" really does raise it to a "7", depending on who and how the measurements were taken?

Wynn's, a common brand name, was good for 0.8 increase on the RON meter, while claiming a 2 to 5 point increase.

You all know "Super 104+", it was good for 0.9 boost, while claiming a 4 to 7 increase.
There are a number of boosters that barely make a .1 octane increase. Buyer beware. The bottom line is, "boosters" can make all kinds of claims without fear of running into truth in advertising laws.

I was running 12.5 to 1 compression with IRON heads on my side oiler. Knock was a constant problem. I learned a bunch about timing issues, lean or rich fuel settings, octane boosters, etc. etc. When the smoke cleared, literally after wiping the camshaft out, I went with new pistons. I was sick and tired of the constant "octane battle", the BS octane boosters and the $6 a gallon race gas. I would have tried thicker head gaskets, but my compression was already so high I needed to take drastic action.

Mostly I just backed off the timing, BUT, I could feel and measure (at the drag strip) the loss of power with reduced timing. Man that motor LOVED a lot of advance and dropping it would just kill the power. But, at least I could drive on the street...