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10-07-2015, 03:46 AM
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Join Date: Nov 2014
Location: In the center of France
Posts: 90
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Red cube install beside spider
Hello,
I am going to install my red cube and have some interest to install it between the fuel servo and the spider. For those who choosed the same location, I would like to know if they experimented some "Vapor Lock" because of the proximity of the hoses between the cylinders.
In advance thank you
Sylvain
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Location: France
RV7 QB (F-PSED), Tip Up, Aerosport IO-375, James Cowl, WW 200RV, Dynon Skyview, VP-X sport, Day VFR,
Flying...
Phase 2
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10-07-2015, 06:55 AM
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Join Date: Jul 2009
Location: Mojave
Posts: 4,652
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My FF transducer is mounted directly to the flow divider with a NPT nipple. Can't get any closer than that, and I have not seen any issues with vapor lock or inaccuracy.
__________________
WARNING! Incorrect design and/or fabrication of aircraft and/or components may result in injury or death. Information presented in this post is based on my own experience - Reader has sole responsibility for determining accuracy or suitability for use.
Michael Robinson
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Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
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10-07-2015, 06:57 AM
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Join Date: Sep 2007
Location: Central IL
Posts: 5,516
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Quote:
Originally Posted by Sylvainsting
Hello,
I am going to install my red cube and have some interest to install it between the fuel servo and the spider. For those who choosed the same location, I would like to know if they experimented some "Vapor Lock" because of the proximity of the hoses between the cylinders.
In advance thank you
Sylvain
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The cubes I have seen mounted under the cylinders, and plumbed between the servo and spider have been covered with fire shield. That is my plan. Good question about experience, though.
__________________
Bill
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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10-07-2015, 07:12 AM
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Join Date: Aug 2005
Location: Dallas/Ft Worth, TX
Posts: 5,687
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I would suggest you review and follow the guidelines in the EI install manual:
http://buy-ei.com/wp-content/uploads.../II-MVP-50.pdf
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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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10-07-2015, 09:17 AM
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Join Date: Dec 2008
Location: Big Sandy, WY
Posts: 2,567
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I've got mine like Michael. Pipe nipple, no sleeving. Its right up front center, so it gets whatever cool air there is coming in. Accurate, stable. Mine is a floscan, but same difference.
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Actual repeat offender.
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10-07-2015, 10:07 AM
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Join Date: Apr 2010
Location: Ridgeland, SC
Posts: 2,589
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WE have several flying examples of cubes mounted at or near the spider. We havent heard (in 2+years) of flight time, of anyone having any issues, vapor lock (that was traced back to the location), or any failures. Flow readings have been consistent with those in other locations.
Tom
__________________
Tom Swearengen, TS Flightlines LLC, AS Flightlines
Joint Venture with Aircraft Specialty
Teflon Hose Assemblies for Experimentals
Proud Vendor for RV1, Donator to VAF
RV7 Tail Kit Completed, Fuse started-Pay as I go Plan
Ridgeland, SC
www.tsflightlines.com, www.asflightlines.com
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10-07-2015, 10:25 AM
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Join Date: Jul 2006
Location: State of Bliss
Posts: 396
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Fuel Servo - Distributor
Mine is on a piece of aluminum (wires UP as specified) in front of the sump. No vapor lock issues.
FF readings do not fluctuate as they did with the FloScan transducer in the tunnel.
See the red cube config Rob Hickman uses (pic in the AFS manual).
__________________
Ch?z King
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10-08-2015, 02:44 AM
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Join Date: Nov 2014
Location: In the center of France
Posts: 90
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Thanks
Many thanks for your all replies. It's help !
Sylvain
__________________
Location: France
RV7 QB (F-PSED), Tip Up, Aerosport IO-375, James Cowl, WW 200RV, Dynon Skyview, VP-X sport, Day VFR,
Flying...
Phase 2
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10-08-2015, 08:03 AM
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Join Date: Jun 2006
Location: Vero Beach, FL
Posts: 881
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Sylvain,
We mounted ours there and have 40 hours on it now. No issues, hot starts great, no rough running engine after hot start. Angle valve engine. Fuel flow indicates normally at all times, very accurate.
Tom at TS Flighlines made us up the hoses you see here, great service.
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10-08-2015, 08:30 AM
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Join Date: Apr 2012
Location: Tampa (BKV)
Posts: 926
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Call EI. They will tell you to mount it there. That's what they told me and 350 hours later it's working great. I won't say I do not have hot start issues though...but I suspect it's the same as every other injected engine with a tight set of baffles. That said, it is one more thing to heat soak up there on top of the engine.... She always starts..but complains about it.
If I were to build again, I would put it in the same place.
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