VERY good information.

I have the same issue on my car with the carbs (and similar carbs). I'm pretty sure the pistons are full open very quickly such that the needle has little to do with mixture.

So, based on the above, I need to get to the dyno with different oils and springs, and have at it? I also need an O2 sensor operating off of each carb (and EGT is not enough I suppose) to watch A/F over the rev range?

The "street" belief on my carbs is that a bit rich makes the most power - true of the SU knock offs on the Z as well? Or just something you need to test to see?

Ron, I see a full dyno day for both cars here shortly. Lots of improvements to be made I think.

Thanks a bunch Keith.