Hi guys,
I'm sure some of you have used this system and was hoping to get some information from ya. I have this system for my OS 40 FSR and not sure how I should set it up. If you go to the Macs Product Tuning Charts it seems that they're using a different way to set up pipe that the way I heard ya do it. Macs cuts the header pipe to tune the system and you buy the length pipe that in recommended for the size engine your using. Question do you set up R/C pipe engine and C/L engine using the same method?? Macs says run the engine with exhaust wide open and tact rpm's than install header and pipe then run engine and check rpm's and adjust engine by cutting the header. I've heard that you measure from the glow plug to the end of pipe!! Macs system measures in a different manner??? What to do, What to do. I tried calling Macs Product but got no answer, also tried e-mail, no answer. The system looks very nice on a profile ship. Maybe next week they'll be open and maybe I'll get the answers I'm looking for??? The engine sure sounds nice hook up to the system. Just need a few answer before I put it in the air, Gary