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  #1  
Old 05-26-2019, 06:46 PM
redhawk redhawk is offline
 
Join Date: May 2008
Location: Boulder, CO
Posts: 191
Default 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!
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  #2  
Old 05-26-2019, 09:08 PM
titanhank's Avatar
titanhank titanhank is offline
 
Join Date: Aug 2007
Location: Friendswood, Tx
Posts: 390
Default

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.
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Rv-6
0-320/180+hp
10-1 pistons
Lycon port/polish
Dual pmags
EI Commander
Whirlwind 200rv prop
IFR Glass panel
Trutrak Vizion 385 Autopilot
Flightline Interior
Almost rv14 seat mod/cable locking
Electric seat back adjuster

Last edited by titanhank : 05-27-2019 at 08:53 AM.
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  #3  
Old 05-27-2019, 09:04 AM
BlndRvtr BlndRvtr is offline
 
Join Date: Mar 2009
Location: NE Where
Posts: 339
Default

What's the detonation margin at that CR?

George
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  #4  
Old 05-27-2019, 12:24 PM
titanhank's Avatar
titanhank titanhank is offline
 
Join Date: Aug 2007
Location: Friendswood, Tx
Posts: 390
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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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Rv-6
0-320/180+hp
10-1 pistons
Lycon port/polish
Dual pmags
EI Commander
Whirlwind 200rv prop
IFR Glass panel
Trutrak Vizion 385 Autopilot
Flightline Interior
Almost rv14 seat mod/cable locking
Electric seat back adjuster
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  #5  
Old 05-28-2019, 09:01 AM
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maniago maniago is offline
 
Join Date: Aug 2014
Location: Bowie MD
Posts: 886
Default

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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Busby MustangII (FoldingWing) Pending DAR.
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  #6  
Old 05-29-2019, 05:19 AM
redhawk redhawk is offline
 
Join Date: May 2008
Location: Boulder, CO
Posts: 191
Default 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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  #7  
Old 05-29-2019, 06:10 AM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,297
Default

Quote:
Originally Posted by redhawk View Post
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.
Stroke is set by the crank. Different rods or pistons are also required for a stroked crank. I think ECI does it with rods, but not sure.
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  #8  
Old 05-29-2019, 06:36 AM
BillL BillL is offline
 
Join Date: Sep 2007
Location: Central IL
Posts: 5,516
Default Combustion basics. . . .

Quote:
Originally Posted by titanhank View Post
It runs great and the cht?s are surprising cool.
Lower CHT due to faster burn rate(shorter crank duration) and therefore lower heat rejection to components of combustion chamber. The heat is turned to work (BHP) instead of being lost (CHT).
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RV-7
Lord Kelvin:
“I often say that when you can measure what you are speaking about,
and express it in numbers, you know something about it; but when you
cannot measure it, when you cannot express it in numbers, your knowledge
is of a meager and unsatisfactory kind.”
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  #9  
Old 05-29-2019, 08:54 AM
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gmcjetpilot gmcjetpilot is offline
 
Join Date: Jan 2005
Posts: 4,285
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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...
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Raleigh, NC Area
RV-4, RV-7, ATP, CFII, MEI, 737/757/767

2020 Dues Paid

Last edited by gmcjetpilot : 05-29-2019 at 11:20 AM.
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  #10  
Old 05-29-2019, 10:56 AM
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Walt Walt is offline
 
Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
Default

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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Walt Aronow, DFW, TX (52F)

EXP Aircraft Services LLC
Specializing in RV Condition Inspections, Maintenance, Avionics Upgrades
Dynamic Prop Balancing, Pitot-Static Altmeter/Transponder Certification
FAA Certified Repair Station, AP/IA/FCC GROL, EAA Technical Counselor
Authorized Garmin G3X Dealer/Installer
RV7A built 2004, 1700+ hrs, New Titan IO-370, Bendix Mags
Website: ExpAircraft.com, Email: walt@expaircraft.com, Cell: 972-746-5154
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