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Stroker Cylinders - O-320 HP upgrade to 180HP
Hey out there,
I?m looking at doing this... Just wondering who has done this and what?s involved, and who best to purchase cylinders from. Thanks! |
I just completed this exact build.
0-320 b2b stock 160hp Complete rebuild All steel parts overhauled by aircraft specialties Case overhauled by divco New cylinders from http://www.airpowerinc.com/ Overhauled crank New cam with dlc coated lifters New combustion tech 10:1 pistons Crank, rods and pistons balanced within 1 gram. Prop dynamic balanced to .02 ips. Drop shipped cylinders to lycon for port/polish and strip paint with anodizing. Drilled carb main jet from #42 to #37 Dual pmags Engine is estimated at 190+hp by lycon. They build the exact same engine without 10:1 pistons for supercubs and it dynos 185 hp. The video is in the media section of lycon’s website. Last two videos. http://www.lycon.com/media.html My engine runs cool, pulls like an 0360, weigh 20 lbs lighter than a 360 and cost me $20k to build. There is no more power to be had out of my engine short of a turbo. I also converted from a catto 3 blade fixed pitch to a whirlwind 200rv prop and swapped the odyssey pc680 for the earthx 680. This saved me 10lbs in battery alone. The performance difference was dramatic and well worth the $30k i spent firewall forward. |
What's the detonation margin at that CR?
George |
No idea, not an engineer. Lycon said they never had any problems with 10:1. It is the defacto piston for performance. They told me to run it rich below 5000ft and only lean below 75% power. It runs great and the cht?s are surprising cool.
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Whats this now? What are socker cylinders? Where can I read more about this...and is there similar for the 360 line? Not getting any google hits on socker cylinders....
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Stroker cylinders
My apologies (thanks spell check!) I think the correct spelling is ?Stroker? cylinders from ECI.
I am still trying to determine if it is as simple as just buying 4 of the Stroker cylinders from a ECI supplier and swapping out the original O-320 cylinders. |
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Combustion basics. . . .
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Not a fan of CR over 8.5 or 9:1 with 100LL. Just my opinion, run that bad boy full rich until below 65% power. Detonation and the damage it causes can happen fast with out much if any indication... I flew an experimental O-235 Lyc engine and it blew a hole in the piston... Engine kept running with partial power to get on ground (was over grass strip), so I did not demand much of it. It shook like a son of a gun even at the very reduced power.
If upping the CR was easy and reliable Lycoming would do it. Oh they did, and they stopped making that engine. If you want more power I'd go with more Cubes... |
IO370, 195hp Runs like a scalded dog!
(they have also certified this 9.6-1 CR) http://www.continentalmotors.aero/ti...ines/x370.aspx |
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