Question on future exhaust purchase? 7 with O-360 carb. with FP prop. Is there going to be a difference from using the 1 1/2 rather than 1 3/4 dia. tube coming from the cylinders to the mufflers?
properly sized pipes can increase velocity and improve scavenging. Properly sized sized exhaust pipes are good for a few ponies at the top end. Neutral anywhere else.
I see no reason not to get the 1.5" (especially for a 320) and that's what I did.
I ordered the 1.5" for my 360. Clint's test showed an ever so slight HP improvement. I did not order it for that. Less weight and more component clearance. The fit-up was superb.
