Plenum to cowl clearance

[Webb]

How much space should there be from the plenum to the cowl?

My plenum top was molded using the cowl so it mirrors the cowl curves. Once I have proper clearance, I’ll finish building the plenum.

 

[Richard Connell]

I went with approx 5/8. Worked out closer to 3/4. I was most concerned about the front corners rocking on shutdown and touching but it’s been fine.

I’ve got a bajillion pictures in an album PM if interested