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Old 05-06-2018, 08:50 AM
M McGraw's Avatar
M McGraw M McGraw is offline
Join Date: Dec 2012
Location: Greenback, TN
Posts: 354
Default Update

Hello Rob,
My last update focused on testing at fixed timing (20BTDC). I have done significant testing on variable timing both ROP and LOP. I need a few more months to make sure my data is repeatable.

What I can say is the timing curve for ROP is very flat so increasing timing does increase performance, but Iím not certain it is enough of an increase to justify the unknown reduction in detonation margin.

LOP results are trending much better and I do like what I see; however, I really need to make certain my data is repeatable.
Marvin McGraw, 5TN4
RV-14. #140039 Complete
Flight hours: 150+
2018 Dues Paid
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Old 05-06-2018, 10:07 AM
jetmech's Avatar
jetmech jetmech is offline
Join Date: May 2007
Location: Fairfield, CA
Posts: 95
Default 1st flight

Yesterday I took to the air for a first flight.

Congrats Sir great job and the fun is just starting!
looking forward to seeing the EFII map you post
Chelton Flt sys
RV-3a/o-320 Old School style Brada
Speed is life! Bank it & Yank it for the G's
Dues paid 2018 thxs again DR!
Home base -o88
Team Light Aviation LLC.
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Old 05-06-2018, 11:42 AM
rv6ejguy's Avatar
rv6ejguy rv6ejguy is offline
Join Date: Mar 2005
Location: Calgary, Canada
Posts: 4,399

Be aware that most of the modern SDS setups are using different injectors with different flow rates in different placements and orientation from the rebranded setups. Fuel maps will not be comparable as a result.

Ignition maps won't be comparable either unless on the same engine, CR and fuel (and be sure to verify actual ignition timing and Magnet position). Some builders have found actual ignition timing has been advanced 1-3 degrees when checked from the pre-set values.

Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, Marcotte M-300, IVO, RV6A C-GVZX flying from CYBW since 2003- 420 hrs. on the Hobbs,
RV10 95% built- Sold 2016

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