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  #41  
Old 06-29-2019, 10:18 AM
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Mark33 Mark33 is offline
 
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Originally Posted by NinerBikes View Post
Will also be interesting to see what the hourly fuel consumption is with this new Fi rig. Wondering what type of fuel pump and fuel pressures are needed with these fuel injectors?
Iím sure Ross will chime in, but Iíll bet worst case scenario fuel burn will be the same as the carbureted version...but more than likely better. Iím sure the duel Walbro fuel pumps will be used along with the Borla fuel pressure regulator which will maintain 45-50 psi on the fuel rail. More than likely itíll basically be the same setup as whatís offered for the EFI Lycoming installation.
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  #42  
Old 06-29-2019, 11:16 AM
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rv6ejguy rv6ejguy is offline
 
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Originally Posted by NinerBikes View Post
Will also be interesting to see what the hourly fuel consumption is with this new Fi rig. Wondering what type of fuel pump and fuel pressures are needed with these fuel injectors?
While we haven't tested this new setup yet, our earlier Rotax EFI systems have shown a 4-18% reduction in fuel burn. The wide range there is dependent on leaning strategies, altitude and whether you have EFI only or EFI plus our EI. Many Rotax systems we supplied in the past still retained the factory fixed ignition timing which is a compromise just as on a Lycoming.

With the newer EM-5s, we also have the capability to individually trim fuel to each cylinder in flight for zero GAMI spread. This should eke out 1-2 more percent in savings.

We use a smaller version of the electric Walbro pumps we supply on Lycoming systems. Can use twin pumps if desired. Fuel pressure is generally set around 40 psi.

Price wise, I haven't received all the machining bills yet but we are hoping to keep the new kit price in line with the older kits using the fabricated intake manifold which chewed up a lot of hours making, fitting and welding.

You can see some of the other parts and older systems here: http://www.sdsefi.com/rotax.htm
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Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, RV6A C-GVZX flying from CYBW since 2003- 432.6 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
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  #43  
Old 06-29-2019, 02:26 PM
NinerBikes NinerBikes is offline
 
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More than enough pressure to prevent any vapor lock with winter grade MoGas with 10% ethanol in late spring or summer heat at higher elevation airports, when motor is hot, after a burger run?
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  #44  
Old 06-29-2019, 02:51 PM
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Mark33 Mark33 is offline
 
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More than enough pressure to prevent any vapor lock with winter grade MoGas with 10% ethanol in late spring or summer heat at higher elevation airports, when motor is hot, after a burger run?
Yep. Thatís one of the beauties of electronic fuel injection.
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