flyrotary@lancaironline.net Mailing List Archive

Yes, the spell correction gods messed with my spelling. Should read 1000 ohms across the CAS. Tracy Sent from my iPad > On Jul 29, 2016, at 20:27, Stephen Izett <flyrotary@lancaironline.net> wrote: > > Thanks Tracy > Your "1000 Pham” I take it is 1K resistor across the CAS pins. > Steve >> On 30 Jul 2016, at 11:21 AM, Tracy Crook <flyrotary@lancaironline.net> wrote: >> >> Hi Steve, >> Just another possibility FWIW. >> >> The symptom of acting different with different pitch settings of the prop does not fit this possibility but most everything else does. >> >> Several ec2 users had similar problems when using it n the Renesis. The ec2 was designed well before the Renesis came out so the sense input circuit is not well matched to the Renesis CAS. Plus, there are at least 4 different versions of the ec2 so that complicates things as well. >> >> If the MAP sensor tap changes don't help,you might try installing a 1000 Pham resister IN PARALLEL with the CAS . This could be anywhere along the path, either at the CAS or at the ec2. >> >> There were also some internal retrofit changes I made for ec2 / Renesis users. I can't remember whether you have had them or not. >> >> Tracy >> >> >> >> Sent from my iPad >> >>> On Jul 29, 2016, at 03:19, steve Izett <flyrotary@lancaironline.net> wrote: >>> >>> Hi Guys >>> >>> We did further testing of the Renesis today. Would really appreciate your heads on this. >>> Last series of tests we had this major missing and noise which I think is fuel exploding in the exhaust. >>> This happens at various RPM’s based on load from the adjustable prop. >>> With fine pitch it would spin out to just over 7000rpm before striking this mayhem. >>> With medium pitch it would get to 6000rpm before the same symptoms. >>> From memory these were both at about 22-23 inches of Hg. >>> My Wideband O2 is malfunctioning at present. >>> The narrowband response time appears to slow to discover what the mixture is doing during the episodes. >>> >>> Also still having trouble with the EM3. Sometimes display reads what appears to be an error message and at other times stops reading RPM. >>> The Skyview Engine monitor has the same issue at the same RPM so appears directly related. >>> I changed the input on the Skyview to the Standard RPM input as I incorrectly fed the injector pulse to the lower voltage input, but this made no difference. >>> >>> I had wondered if the secondary injectors weren’t getting power and as a consequence when it staged to all 4 injectors the trouble began. >>> Using the EM3 display (staging asterisk) and switching power off to the secondaries I was able to ascertain that the secondaries appear to be functioning fine. >>> I did notice that the point of staging appears to be not solid. >>> This takes me back to Ed’s comments re damping the manifold signal to the EC2. >>> Sorry Ed, you might have had it right last week. I thought because it was running so smoothly up to 23 inches that it wasn’t a signal issue. >>> Maybe the wavelength/timing of those pulses at ~6000rpm matches the manifold signal tap position! >>> >>> Ed, you mentioned either small orifice or accumulator. I estimate the volume of the signal line to be approx 18 cubic centimetres. >>> My gut was that the accumulator required to damp the signal would need to be an order of magnitude larger. (total guess) >>> So maybe 180 cc’s but thats half a Coke can! Seem’s way to big. >>> Ed, did I understand you right that a small fuel filter can do the trick? I thought they would only be about 10 cc’s in volume. >>> I suppose if the pulses are very narrow/short maybe thats all to takes to damp out the pulses. >>> >>> Can I ask the group please. Who had trouble with manifold signal and what was the solution that worked best. >>> Paul Lamar advocates tapping the signal from the oil injection ports. Has/is anyone using this solution? >>> >>> Thanks very much everyone. >>> >>> Steve Izett >>> Glasair Super II RG >>> Reneis 4 port EC2 EM3 RD1-C >>> >>> >>> >>> >>> >>> >>> >>> >>> -- >>> Homepage: http://www.flyrotary.com/ >>> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html >> >> -- >> Homepage: http://www.flyrotary.com/ >> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html > > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/List.html