I was looking at a video tonight trying to understand a temperature side affect of a timing change I made to my XJ6 , which had been knocking under high load (OK, when being flogged then).

I thought the explanation was so good I would post the channel here. They also appear to have a few on SU carbs. Ive also included some other channels that have given me useful info over time.

https://www.youtube.com/user/MossMotorsCom/videos

https://www.youtube.com/user/EricTheCarGuy

https://www.youtube.com/user/PaintballOO7/featured ChrisFix

https://www.youtube.com/channel/UCD3...IfqPFhlOYcLt6Q BriansMobile

https://www.youtube.com/channel/UCyc...qrcC0M90gdve5A Automotive Basics

hope you find some of these useful

 

Forgot this one from Scanner Danner, a good one for learning to troubleshoot more modern cars

https://www.youtube.com/user/ScannerDanner