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10-31-2016, 10:23 PM
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Join Date: Oct 2009
Location: Sydney, Aust.
Posts: 820
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G'day Ross,
Have there been any failures of the ECU that you're aware of? And how many customers would you say choose the dual ECU vs single ECU option?
__________________
Once you have tasted flight you will forever walk the earth with your eyes turned skywards, for there you have been and there you will long to return - Leonardo DaVinci
My Flickr gallery: http://www.flickr.com/photos/35521362@N06/
RV-9A - Finished on 10th February 2016 after 4 years, 9 months and 19 days! The 1020th RV-9 flying.
First flight 26th March 2016. Essential specs 145KTAS @ 2400RPM, 8000', 24.2LPH, Initial RoC 1800FPM.
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11-01-2016, 05:19 AM
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Join Date: Feb 2015
Location: Locust Grove, GA
Posts: 621
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How did you make your choice?
Those of you who went with either SDS or EFII - what criteria did you use to make your choice?
It sounds like both companies produce first class products and their service is equally outstanding. I also understand that SDS makes the ECU's for both systems.
So how did you choose one or the other? Not trying to start a battle but I'm sure there is a feature or features that swayed the decision.
__________________
Krea Ellis
Locust Grove, GA
DA20-A1 "Princess Amelia" - gone home to Amelia Island
RV-7A Phase 2
RV-10 under construction at Synergy Air South
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11-01-2016, 06:35 AM
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Join Date: May 2010
Location: Baton Rouge, La.
Posts: 753
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EFII VS. SDS
I was one of the early adopters of Roberts EFII system. All I can say is that the system works perfectly and Robert has outstanding customer service. He offers a turn-key package that's easy to install along with detailed instructions. Yes, he does get the ECU from Ross at SDS, but I'm not sure what else he gets from him. Although I've never purchased anything directly from Ross, I have sent my ECU's back to him for a software update and he also provided me with excellent customer service. I'm not sure how much of a turn-key package Ross offers but I'm sure you'll be very happy with the electronic ignition and electronic fuel injection that you'll now have. I'm not sure if there's ever been a failure of an ECU but I did go with the duel ECU setup just to given me a little more redundancy and to give me the warm fuzzies. I would highly recommended this systems regardless of what company you ultimately decided to do business with.
Mark
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11-01-2016, 07:01 AM
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Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,766
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Quote:
Originally Posted by KRviator
G'day Ross,
Have there been any failures of the ECU that you're aware of? And how many customers would you say choose the dual ECU vs single ECU option?
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I am not aware of any ECU failures in aviation. We're closing in on an estimated 450,000 flight hours now on around 1500 aviation units. We have heard of several MAP sensor failures but these appear to mostly on third party supplied sensors of unknown quality or where the sensors were not mounted in the recommended orientation allowing condensation to settle on the sensing chip over time.
We've heard of at least one TPS failure in cruise but the pilot zeroed out the values with the programmer and continued to destination- one reason we recommend having the mixture knob and programmer installed in aircraft.
Had one forced landing on a T51 whose builder decided aluminum exhaust stacks would save some weight. These predictably melted, allowing exhaust gases to melt through the crank sensor cable. We now supply fire sleeve for that cable.
There were at least 2 failures on third party supplied coil drivers due to faulty soldering. These showed up on the ground fortunately.
There may indeed be other failures which are not reported to us. If you've had one, we'd like to know and try to learn why. There have been a number of problems caused by bad wiring practices causing phantom missing or ECU shutdowns/ reboots. ECUs do require good grounds and power to operate obviously.
I would say that single vs. dual ECU choices tend to follow budgets in most cases these days. VW guys almost never purchase dual systems, RV10 guys almost always do. Of the 1500 units flying, certainly well over 1200 of those are single ECU systems. I'd say our mix now in the last 2 years though is about 50/50 single/dual.
The ECU only draws about .1 amps and uses FET drivers (very power efficient and cool running), heat sunk to a thick billet chassis. There is no significant heat anywhere and no external cooling is required, thus there are no real reasons for a unit to ever fail. One of our bench test units had about 145,000 hours on it running 24/7 for years before it was retired for a newer model.
Unlike some competitor electronics, our controller boards are conformal coated in critical areas to better resist moisture and vibration and internal wiring is all strain relieved. I've been shocked to see how some competitors build their electronics, maybe ok sitting in your house but likely to fail bolted to a vibrating airplane over time. Our FF components are weather sealed whereas many competitor components really aren't.
We've got features that nobody else is offering at this price point like individual cylinder fuel trim, data logging and dual access programmer. Our Lycoming kits are very complete. You can see that all the aluminum bits are nicely annodized for durability and looks. Not shown in the photo below are the Tefzel wiring harnesses built to your length and termination specs.

Last edited by rv6ejguy : 11-01-2016 at 07:38 AM.
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11-01-2016, 07:04 AM
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Join Date: Jul 2009
Location: Mojave
Posts: 4,652
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Quote:
Originally Posted by KatanaPilot
Those of you who went with either SDS or EFII - what criteria did you use to make your choice?
It sounds like both companies produce first class products and their service is equally outstanding. I also understand that SDS makes the ECU's for both systems.
So how did you choose one or the other? Not trying to start a battle but I'm sure there is a feature or features that swayed the decision.
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Had a visit with Robert about a year ago and while he offers a compelling package, as a long time gearhead I just could not accept the backwards facing injectors. Despite the evidence that they seem to function ok, it just screams "Rube Goldberg" to me. Ross' direct mount injectors use the factory Lycoming injector geometry and are a much more elegant solution to me. No permanent modifications required - Ross takes the "bolt on" EFI concept to a new level.
While Ross' injector mounts were the primary discriminator for me, the targeted aviation specific software changes that Ross has come out with in the last year sealed the deal. Ross' advances have clearly left the older CPU still retained by EFII in the dust.
So, both SDS and EFII have good product- but SDS fits my needs/wants much better.
__________________
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
Last edited by Toobuilder : 11-01-2016 at 09:41 PM.
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11-01-2016, 07:49 AM
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Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,766
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Clearly people have their preferences for fuel injection and ignition systems. Nobody has the same mission and comfort level so there is no "right" system for everyone. Mechanical FI systems and even mags still appeal to many. I just think it's good that there are several choices for both which may fit your needs and wants.
My standard advice is to research all your potential choices, contact the vendors and others already using the systems for feedback and to help judge what your customer support might be like after purchase.
We want the customer to be happy with their choice in the end whether it's SDS, EFII or even another system. It isn't small change for any of these setups to be sure. I don't think you see many customer service complaints with AFP, SDS or EFII because we all know long term survival and growth is largely driven by customer satisfaction and word of mouth. It doesn't make sense to treat people badly or BS them.
We certainly appreciate all of the customers who've chosen our products and show such loyalty towards them.
Last edited by rv6ejguy : 11-01-2016 at 08:11 AM.
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11-01-2016, 08:33 PM
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Join Date: Feb 2006
Location: Goodhue, MN
Posts: 160
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Ross, is there any plan to verify your top mount injectors work for the ECI cylinders? I know the website says they're tested with Lycoming only. If it was a known working bolt in config for an ECI 320, I'd start planning how to make the necessary fuel and electrical mods to support an install.
The info on single/dual ECU is insightful; is it a straightforward process to change the single to dual later on if desired, say for an IFR upgrade? Or simply better to go dual from the start.
__________________
Joshua Wyatt | Goodhue, Minn.
RV-9A N627DW @ KRGK - Flying since 2012
AFS 4500s | Stratux | SDS EM-5
rv9a.pacificrimsound.com
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11-02-2016, 05:22 AM
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Join Date: Feb 2015
Location: Locust Grove, GA
Posts: 621
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Me too...
I'm in the same boat, at least for the RV-7A project I'm about to buy. The engine is a Titan ECI O-360 which I assume has ECI cylinders. I saw the plugged injector ports on the heads and I expect you could use a Bendix-type FI system.
I would also like to know if the SDS thread in injectors would work on this engine.
The RV-10 I'm building has a Lycoming engine, not a clone. I would like to use the same system on both airplanes.
__________________
Krea Ellis
Locust Grove, GA
DA20-A1 "Princess Amelia" - gone home to Amelia Island
RV-7A Phase 2
RV-10 under construction at Synergy Air South
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11-02-2016, 06:03 AM
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Join Date: Mar 2005
Location: Calgary, Canada
Posts: 5,766
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Quote:
Originally Posted by jwyatt
Ross, is there any plan to verify your top mount injectors work for the ECI cylinders? I know the website says they're tested with Lycoming only. If it was a known working bolt in config for an ECI 320, I'd start planning how to make the necessary fuel and electrical mods to support an install.
The info on single/dual ECU is insightful; is it a straightforward process to change the single to dual later on if desired, say for an IFR upgrade? Or simply better to go dual from the start.
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A customer with ECI cylinders will be receiving his kit next week and verify the screw-in injectors fit these ok. Detailed photos make it look like they will fit but only trying them will confirm.
I will be out at an engine shop in the next 10 days regarding some other matters but I'll try to test fit the injectors on all brands of cylinders I can find in their shop while I'm there. Will report my finding here.
It's not so easy to change from a single to dual ECU after installation but doable. There is a lot of extra wiring, sensors and switchgear to install and the programmer would need to be changed for the dual access type. The Hall sensor mount accepts both single and dual type sensors though so that can remain as is.
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11-02-2016, 06:54 AM
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Join Date: Jul 2009
Location: Mojave
Posts: 4,652
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Quote:
Originally Posted by jwyatt
...The info on single/dual ECU is insightful; is it a straightforward process to change the single to dual later on if desired, say for an IFR upgrade? Or simply better to go dual from the start.
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For those who are considering the SDS product, I would recommend going with the dual hall sensor right from the start regardless of your plan to go dual or single systems. This goes for the CPI or EM-5 systems. I just helped a buddy install a single CPI on his F-1 Rocket, convinced he was going to retain the magneto. Well, after the first flight he was ready to dump the mag for a second CPI, but was not looking forward to digging around the fwd baffling and stringing more wire again.
The cost and weight penalty of the second sensor is negligable and even if you truly remain with a single system, you have a "spare" sensor in the unlikely event the hall goes Tango Uniform. The hall sensor is not difficult to install, but you really only want to have to do it once.
__________________
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
______________
Harmon Rocket II -SDS EFI
RV-8 - SDS CPI
1940 Taylorcraft BL-65
1984 L39C
Last edited by Toobuilder : 11-02-2016 at 06:57 AM.
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