Sunriver Ken
Well Known Member
I have an Rv-9A that I bought from the original owner who is now deceased (hopefully there is no coorelation there). He installed a new Superior O-360 in 2002. He had a nose wheel issue/prop strike and sent the engine to Lycon for checking and fix. While there Lycon did the performance improvements such as port and polish and balance but they say they did not change to a higher compression piston. The engine dyno'd at 214HP at 2,700 RPM which seems high to me for an engine with stock compression ratio pistons.
I have talked with Superior and their records show the engine to be a stock 180HP engine. The engine has Lazar electronic ignition.
I would like to run premium mogas with no ethynol but am hesitant as I do not want pre-ignition/detonation. The conbination of dyno'd horespower and electronic ignition has me a little scared to use anything except 100LL.
Any idea how I could determine the type /compression of the pistons without maybe a borescope?
I have talked with Superior and their records show the engine to be a stock 180HP engine. The engine has Lazar electronic ignition.
I would like to run premium mogas with no ethynol but am hesitant as I do not want pre-ignition/detonation. The conbination of dyno'd horespower and electronic ignition has me a little scared to use anything except 100LL.
Any idea how I could determine the type /compression of the pistons without maybe a borescope?