Originally Posted by jihernandez
I though I needed to lean out HSN?
Am using 5-port Sirio engine and my HSN setting now is at 5 turns out which is still a bit rich. hmmmmmm.
Leaning a motor will always increase heat. Because you are taking away the cooling agent , aka the fuel.
When you richen , increase the amount of fuel in the mixture. You cool the engine more by allowing more liquid to enter the chamber at the time of combustion.
The best way to run a motor is to find the optimum tuning point and richen a little to allow the most power and proper cooling. You should also watch your exhaust. If smoke isnt coming out on throttle then your possibly running to hot.
Hope that makes sense. I will post a guide to what you are supposed to do when you are faced with different temperatures , humidities and so on.