Thanks Steve and Mike,
even with the AVCS why would you want to alter the target AFRs in that way, surely you should shoot for consistant values until adding fuel to aid cylinder cooling at higher loads and rpm?
Steve thankyou for pointing us in the right direction, it's very much appreciated and I agree with keeping it in the public domain for everyones benefit. The more that find the site the more questions there'll be so it's good to have the information readily available.
I'll report back when I've found the ignition table......