On 13 Aug 2016, at 2:37 AM, William Jepson <flyrotary@lancaironline.net> wrote:

Guys, I was involved with the motorcycle street and racing world for years. We commonly used all different plugs but liked NGK the best our selves. Once after tuning a racing single 2 cycle with great attention to precision I found it wouldn't start. It had a brand new plug out of the box. Not an exotic platinum or other. went back to the original plug and it started on the first kick. got another new plug gapped and installed and it ran like a jet. examination of the faulty plug showed that they had left out the "copper core" and the gap was over an inch internally! Point is any standard production item can fail or have a manufacturing fault. Resistor plugs fail the most often. Always double check even new ones.

Bill Jepson

On Fri, Aug 12, 2016 at 9:01 AM, Stephen Izett <flyrotary@lancaironline.net> wrote:

Hi have a standard compression test kit that has the various hoses and threads for different plug hole sizes.

The gauge that came with it was 1/8NPT thread so just removed gauge and screwed in sensor instead.

Steve

On 12 Aug 2016, at 11:52 PM, Bobby J. Hughes <flyrotary@lancaironline.net> wrote:

Whats involved in swapping the regulator?   Dropping the oil pan and a skinny wrench. 

 

Thanks for the link. I guess I would need to fabricate an adapter to fit in the sparkplug hole.

 

  1   11811      Oil Pressure Regulator -              $104.00          $104.00

                 Street 90-95 PSI 04-08 RX-8

 

 

 

Bobby

 

 

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] 
Sent: Friday, August 12, 2016 10:45 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Update on Renesis

 

Hi Bobby.

 

No idea on the plug change. Haven’t changed anything.

 I had previously had one of the plugs fail as I tested it on top of the motor in diagnostic mode?

Whether it was part of a bad batch. I don’t know how plugs go bad.

 

I thought the gap was similar. Not sure what tracy has in the EC2 that may be attenuating its signal.

I haven’t checked the calibration of the oil sender, but was a little concerned about the pressure being a bit low.

Interesting your was also low. Whats involved in swapping the regulator?

 

Pressure Transducer - http://www.ebay.com.au/itm/331877999223?_trksid=p2057872.m2749.l2649&var=540943937361&ssPageName=STRK%3AMEBIDX%3AIT

 

Cheers

 

Steve

 

On 12 Aug 2016, at 9:34 PM, Bobby J. Hughes <flyrotary@lancaironline.net> wrote:

 

Any theory as to how the plug change corrected the problem? Plug wire routing change?  

CAS (Primary is 4.8vPk-Pk and Backup 1.9vPk-Pk????) - Back up CAS has a larger gap to the trigger wheel?

I wonder what HP she is making - Me too!

Oil Pressure 56PSI -  I had similar oil pressure and swapped the stock 2004 regulator for the Racing Beat Street 90-95 PSI. I now see 88-92 psi at all but idle rpm. I have carburetor jets in the e-shaft oil ports. 

 

Can you point me to the $22 pressure transducer you used to capture the pressure plots? 

Bobby 

-----Original Message-----
From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] 
Sent: Friday, August 12, 2016 6:00 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Update on Renesis

Hi Guys
Today we got back into finding the terrible missing breakdown problem with the Renesis.
We had a list of faultfinding paths to follow but solved it with the first change.
Turned out to be the plugs. Swapped in the NGKBR10EIX (after grinding down a plug socket) and no more problem.

So she now does the following I think reasonably rich:
WOT Prop set fine                  7467 RPM 29.8 Inches EGT’s 1647&1497 23.7 GPH Fuel Pressure 43PSI Oil Pressure 68PSI
WOT Prop set course  5407 RPM 30.3 Inches EGT’s 1579&1494 16.7 GPH Fuel Pressure 43PSI Oil Pressure 56PSI

The EM3 fuel flow is not calibrated yet so not sure how close the GPH likely to be and therefore power levels.
I wonder what HP she is making.

Checked the dwell: See photo showing Rotor #1 T and L signals to D585 coils. Appears to be close to 4mSec’s Checked the signal from the CAS’s: See photo of signals coming from the Primary and Backup I disconnected the Backup CAS and Engine still runs on B so??? (I’m sure I set BUSENSOR in the code) Sorry about the glare on the CRO screen.

            
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