Time to give up on the Thermoquad?

mrbill00 said
"M-1 dual plane with an adapter for the Thermoquad"
...the adapter in-between could be giving you a problem too.

What is the TQ number on the baseplate?

I'm not the first to run an adapter, and it ran fine earlier and has just developed the problem.

Also, I cleaned up the intake to match the adapter, so I don't have any sharp edges to create airflow problems.

Number is a 6454 (if my memory is correct).