Guys,

I am sorry for not being more specific in my first post. I do have the aero tuned pipe from Macs.

I'm not interested in pipe theory. I've already read every single link you guys provided here.

I'm not interested in spending more money to buy some other pipe or muffler or exhaust divertor.

I ALREADY have the header and the pipe. Already spent the money about 2yrs ago on this combo - just never installed it and tuned it because my interests changed and I sold the plane (pattern ship).

Skip forward 2yrs. New airframe. I'm planning to fly it relatively slow. I still have an almost new TH .75 engine and I have a brand spankin' new Macs header and AERO tuned pipe.


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I'll try and simplify my question:

Can I make this combination of pipe and header work to spin a 14-6 prop on an engine that normally would spin a 13-6 prop? Can I have any mid range throttle control or will it be rich and gurgly when it's not "on the pipe" ?