ORIGINAL: qwertypemdas
I have an LT-40 trainer with an evolution 40NT engine. 8.5lb plane with a wimpy .39 engine. Full throttle barely lifts off ground. I'm looking into a tuned pipe to get a little more performance out of my plane. What is the CHEAPEST header and tuned pipe the will work for the evo 40? I built a mousse can muffler but my dad (he doesn't do rc stuff) won't let me put it on my engine. [:@] I just need the cheapest dirt (maybe used?) tuned pipe and header for the evo 40. I REALLY need more power so is there a cheap pipe that works really good? hmmm.
I'm curious as to why your Dad won't let you install the mousse can pipe, but will let you install a header and a pipe. Makes no sense to me. You'll do far less damage to the engine with the MCP if you make a mistake than you ever will with a real header and pipe.
You can find used pipes and headers here on RCU or on eBay. I buy most of that stuff used these days myself. Buying new doesn't make any sense. You can buy an Aviastar .53 for the price of a new Mac's header and pipe and the resulting match won't perform as well as the Aviastar .53.
You'll have to look around and discover which other engines share the same bolt pattern as your Evolution engine and then buy those headers.
Don't get discouraged. Follow your Dad's advice and try to get as much flying time as you can at any speed your model will muster. Believe me, there's tons and tons to learn about the hardest flight mode of all - slow flight.
Ed Cregger