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02-03-2013, 10:37 AM
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Join Date: Aug 2009
Location: Littleton, Colorado
Posts: 182
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G3i Supercharging/ A Sneak Looky
Been refining my supercharger kit for the Lycoming 4-cyl?s. Lots of trick R&D came together for Dyno runs this weekend, Installed the G3i supercharger kit on the O-360-A4A. Pulls out of this stock carbureted, Lycoming un-corrected, with a density altitude of 7121-ft. Torq/HP was 386ft-lbs/184HP @ 2500 and 368ft-lbs/189HP @ 2700, Sea level correction factor on weather station 1.2273. Corrected Torq/HP 474ft-lbs/226HP @ 2500 and 451ft-lbs/232HP @ 2700.
Feels good to hear and feel the RUMBLE.

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02-03-2013, 10:44 AM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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Is there an engine in there somewhere??
Interesting drive pickoff for the blower-------did you re-bearing the alt? And, what alt is it?
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
Last edited by Mike S : 02-03-2013 at 10:57 AM.
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02-03-2013, 11:47 AM
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Join Date: Mar 2005
Location: SE Florida
Posts: 1,499
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Looks like a Hitachi or Mitsubishi alternator to me. I would guess it's for an industrial application. Did you custom fabricate that flywheel with the pulley for the serpentine drive belt for the alternator? What are your boost parameters?
Charlie
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02-03-2013, 11:55 AM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,686
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Quote:
Originally Posted by chaskuss
Looks like a Hitachi or Mitsubishi alternator to me. I would guess it's for an industrial application. Did you custom fabricate that flywheel with the pulley for the serpentine drive belt for the alternator? What are your boost parameters?
Charlie
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I've seen the newer Cessna with a serpentine belt and alternator set up.
__________________
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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02-03-2013, 11:56 AM
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Join Date: Jul 2011
Location: Oliver BC & Red Deer Alberta Canada
Posts: 350
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Intercooler?
Looks like fun, how much weight does all of this add?
Fuel burn?
Intercooler?
A guy could always run it at reduced power settings at lower altitudes to make her last but I think with 230 HP at sea level it will be hard to resist using all of this power at least sometimes..................
I wonder how long it will last running 30% more power before there is a catastrophic failure.
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02-03-2013, 12:17 PM
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Join Date: Jul 2009
Location: New Zealand
Posts: 54
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Just wondered what happens if the belt fails or the alternator bearing seizes, or the impeller self destructs? is there a supercharger bypass of any description? Not being negative just curious.
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02-03-2013, 01:31 PM
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Join Date: Sep 2009
Location: Spokane, Wa (KSFF) & the 'stan'
Posts: 72
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Congrats!
Glad to see someone sticking to the fundamental idea in 'experimental!' I'd also be interested in seeing some dyno plots with boost, fuel flow, air/fuel ratio, tq & hp vs rpm. Good luck in future testing.
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02-03-2013, 02:15 PM
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Senior Curmudgeon
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Join Date: Sep 2005
Location: Dayton Airpark, NV A34
Posts: 15,420
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Intercooler
Looks to be a screw type of blower, and they tend to not have the temp rise like a roots style-----I suspect the intercooler is a non issue.
Plus, notice that it is mounted to the bottom of the oil sump........
__________________
Mike Starkey
VAF 909
Rv-10, N210LM.
Flying as of 12/4/2010
Phase 1 done, 2/4/2011 
Sold after 240+ wonderful hours of flight.
"Flying the airplane is more important than radioing your plight to a person on the ground incapable of understanding or doing anything about it."
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02-03-2013, 03:51 PM
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Join Date: Aug 2009
Location: Littleton, Colorado
Posts: 182
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G3i Supercharging/ A more Sneak Looky
Here a couple more sneak pic?s on what?s going up on the G3i website soon, with all the details. After I run some testing on fuel injection location, pre-blower fuel nozzles.
I machine the stock flywheel to accept the serpentine belt. Custom fab. on the Mitsu/Delco alternator, machined a new, larger rear bearing support with Morse taper on the shaft. A pulley collet installed on the shaft for different compressor drive ratios. The supercharger kit comes in @ 42lbs, less flywheel and alternator. The high helix screw compressor does have a built in by-pass, which also acts as a MP control. O-yeah, how much MP would you like? 50-60 plus?
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Last edited by G3i Ignition : 02-04-2013 at 07:34 AM.
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02-03-2013, 07:44 PM
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Join Date: Aug 2006
Location: Taylor Texas
Posts: 811
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Listen up!
Hey Fellas:
A few things to keep in mind:
1 MP is King
2 More MP King stuff is available with lower compression, or higher octane.
3 Tom knows what he is talking about
4 Listen up
But, speed costs money - how fast ya want to go?
Generally speaking, HP increases require added fuel flow. Well, MAJOR HP increases, anyway. The blower allows you to maintian 75% power to the flight levels, with nearly SL equivalent fuel flows. At those altitudes, using O2, you'll be seeing the efficiency of King MP; a blower is not a low altitude enhancement unless your compression ratio is low (6 or 7:1). Very cool indeed.
Tom, you are doing some amazing stuff. Congratulations.
Carry on!
Mark
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