Originally Posted by
1QwkSport2.5r
All of my Tigres are the older Italian manufactured versions and none of them like to run on 15% nitro. My little .29 will run okay on 10%, but the rest much prefer 5% nitro or less. I use McCoy MC59 plugs in mine that still run on glow fuel. I have a diesel head on a .45 that I'd gotten from a stellar fella here on RCU.
Never had a Chinese ST, just Saturnos. When I lived in the high desert @ ~4K' MSL, I ran several STs on 15% nitro fuel, mostly Red Max castor blend. When I moved to central TX, ~700' MSL and much higher humidity, I switched to 10% nitro. I only have one ST in service now, A S40 ABC; it's happy on 10% Powermaster, castor blend.
I see you live where the altimeter is ~800 MSL. Don't know about the summer humidity.
CR