Originally Posted by
Mark Shead
The stacks I have seen all show rich under boost, So I would guess its about right, Get it checked by someone has a good meter and not a cheap gauge.
Mark
That's strange, I have compared the Stack gauge to our dyno DD AFR reader (Autronics make it for DD) and have found them to almost spot on (give or take .1), I did find that the reading was incorrect during warm up though.