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  #301  
Old 08-12-2019, 03:39 PM
rv6ejguy's Avatar
rv6ejguy rv6ejguy is offline
 
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The LOP button is designed to be used when you lean the engine to LOP. This advances the timing (usually 3-5 degrees) and picks up some of the power lost when running lean of peak due to the slower burn rate of the mixture.

Usually see 3-6 knots come back over fixed mag timing, depending on airframe and how far LOP you are.

The amount of advance for LOP is user programmable as are the basic RPM and MAP timing curves. In fact, almost every parameter right down to cranking retard and coil charge times can be changed.

This is the "Last Word" in aircraft EI systems where you want full control of your timing and not a canned curve like most other EIs offer.
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Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, Shorai- RV6A C-GVZX flying from CYBW since 2003- 433.4 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi2.htm



Last edited by rv6ejguy : 08-12-2019 at 03:44 PM.
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  #302  
Old 08-12-2019, 09:25 PM
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Toobuilder Toobuilder is offline
 
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Location: Mojave
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Quote:
Originally Posted by Bcone1381 View Post
If I installed this on my airplane, when I press the LOP button, what will I see?

Lets say I have a 180 hp Lycoming IO-360 with Bendix RSA fuel injection. The injectors are balanced, and I install your CPI-2 product to replace both Mags. Cruising at 8000' at 60% power and have the timing set lets say to 25 BTDC. What about 10,000' or 12,000'?

I'm guessing EGT decline, CHT's rise.....will I see airspeed rise too? How much?
If you are in fact cruising at 25 degrees advance as your baseline, then activating the LOP feature will show you 5+ knots increase in speed, a 5-10 increase in CHT (which will help, because you will be too cold), and a reduction in EGT.

This assumes that you took the 10 minutes to find "your" optimized LOP value for that condition (EGT/altitude).
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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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  #303  
Old 08-14-2019, 09:39 AM
rv6ejguy's Avatar
rv6ejguy rv6ejguy is offline
 
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We'll have finally cleared our order backlog for CPI-2s by tomorrow so things should return to "normal" around here. This means more time to devote to the EM-6 project which has been coming along steadily but not as fast as we hoped, due to time spent on building and shipping systems. This also means I'll finally have time to get back to other development projects which have been delayed this summer.

We can deliver CPIs in one day, CPI-2s in 2 days and EM-5s in about 3-4 days with our usual backlogs. 6 cylinder versions are available now if you're tired of waiting for other brands to be supplied.

Thanks to those who've ordered CPI-2s to upgrade from CPIs- we didn't expect much of that.
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Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, Shorai- RV6A C-GVZX flying from CYBW since 2003- 433.4 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi2.htm


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  #304  
Old 08-15-2019, 09:24 PM
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rv6ejguy rv6ejguy is offline
 
Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,223
Default Temperature Testing Video

I posted a new video on temperature testing of the CPI-2 controller today:

https://youtu.be/1hzjaygmFJc
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Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, Shorai- RV6A C-GVZX flying from CYBW since 2003- 433.4 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
http://sdsefi.com/cpi2.htm


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