I'm setting up my Vetterman exhaust on my RV9A. How much clearance should I try to get between the tail pipes and the bottom edge of the firewall?
Right now I've got a little over 1/2" and I suspect that might be too close.
I have clearance of less than 1/2” with no issues. However, it may depend on how your exhaust is “hung”. I have suspension clamps very close to the exit opening - the mounting points act as a pivot during the start-up/shutdown shake and minimize the clearance needed. (RV-14A, Lyc 390, Vetterman exhaust)
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