27-04-2020, 10:02 PM
I have a good AFR meter and I have found it's easy to get too caught up on trying to get the reading 'correct' whatever that means. It's a handy tool but I think A7s seem to suit tuning by ear and feel better starting with a needle known to be about right. And you need to drive it of course to really know. Or do what I will probably do, ask a friend who knows to help (Ian, next time you're down!).
Having one tool to measure something can be annoying but as soon as you have several and they all give different readings then you get really confused. Trying to measure temperature accurately is a good example. I have countless meters and thermocouples and thermistors and IR contactless things and they all give different readings. Most accurate thing I have is a lab grade old school mercury thermometer!
The main reason I got my meter was for when I try supercharging the car and then I am in somewhat more unknown territory I and want to make sure I am not way off in the settings.
Since I can't go driving anywhere it isn't a priority just now and I am in the middle of remaking the exhaust at the moment anyway. But once that's done I will try the trick of putting the marked stick in the piston so you can read off what station the needle is at and make adjustments appropriately. That's described in the Des Hammill SU tuning book.
Simon
Having one tool to measure something can be annoying but as soon as you have several and they all give different readings then you get really confused. Trying to measure temperature accurately is a good example. I have countless meters and thermocouples and thermistors and IR contactless things and they all give different readings. Most accurate thing I have is a lab grade old school mercury thermometer!
The main reason I got my meter was for when I try supercharging the car and then I am in somewhat more unknown territory I and want to make sure I am not way off in the settings.
Since I can't go driving anywhere it isn't a priority just now and I am in the middle of remaking the exhaust at the moment anyway. But once that's done I will try the trick of putting the marked stick in the piston so you can read off what station the needle is at and make adjustments appropriately. That's described in the Des Hammill SU tuning book.
Simon