From: "Stephen Izett stephen.izett@gmail.com" <flyrotary@lancaironline.net>
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Subject: Re: [FlyRotary] Re: EC Staging Point
Date: Tue, 16 Jun 2020 07:26:52 +0800
References: <list-373891@logan.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
In-Reply-To: <list-373891@logan.com>
Message-Id: <E39E486D-7211-4E14-B9B6-DBFAE51CF10C@gmail.com>

So a couple of things off note:
1. Steve Boese' procedure for Mode #3 Inj Floe Rate is below staging =
whereas Tracy=E2=80=99s is above.
2. Staging point was set at near 20=E2=80=9D and with the Renesis 4 =
ports smaller Primaries this does seem a bit high.=20
	This makes sense of her going lean prior to the secondaries =
kicking in.
Thanks

Steve Izett


> On 16 Jun 2020, at 5:57 am, Stephen Izett stephen.izett@gmail.com =
<flyrotary@lancaironline.net> wrote:
>=20
> Thanks Jeff for finding this. Much appreciated.
> Steve
>=20
>> On 16 Jun 2020, at 3:53 am, Jeff Whaley jwhaley@datacast.com =
<flyrotary@lancaironline.net> wrote:
>>=20
>> Excellent question - many have scratched heads over the Archive =
Search.  The attached photo shows what you get back from a "Boese" =
search / no Filter.  Which looks like a lot of post from either Boese or =
posts that have his name in them ...
>> I just did another search for "Staging" / no filter ... way down the =
list is a post from Steve titled Tuning ... here's what's inside - read =
it all and rehash:
>> Jeff
>>=20
>>=20
>>=20
>> The following assumes that there are no problems with CAS or =
ignition:
>>=20
>> After setting the controller back to all default program values and =
depending on the update version of your controller, the following =
excerpt from archive message #54156 of Mar 6, 2011 may be of interest:
>>=20
>> "
>> The tuning procedure then becomes the same whether the primary and =
secondary injector flow rates are different or identical:
>>=20
>> a.  Set the staging threshold at a MAP corresponding to the high end =
of the primary injector flow limit using mode 7.  (For 40 lb injectors, =
about 20" MAP works well.)
>>=20
>> b.  Adjust Mode 3 to get a mid scale O2 sensor reading at a MAP just =
below the staging threshold MAP.
>>=20
>> c.  Adjust mode 6 to get a mid scale O2 sensor reading at a MAP just =
above the staging threshold MAP.
>>=20
>> d.  Adjust mode 2 for best operation at minimum idle MAP.
>>=20
>> e.  Adjust the mixture table throughout the useable MAP range using =
mode 1 or 9 to keep the O2 sensor reading mid scale.  (To be honest, I =
skip step "e" and simply use the manual mixture control to adjust the =
mixture in cruise.) "
>>=20
>> Steve Boese
>> RV6A 1986 13B NA RD1A EC2
>>=20
>>=20
>> From: Rotary motors in aircraft <flyrotary@lancaironline.net> on =
behalf of steve Izett <flyrotary@lancaironline.net>
>> Sent: Wednesday, January 6, 2016 4:11 PM
>> To: Rotary motors in aircraft
>> Subject: [FlyRotary] Re: Tuning
>>=20
>> Thanks Jeff
>> I thought everything was zero'ed since last program but I'll go =
through and reset all settings.
>> I thought given the parameters set at chip program such as RX8, =
Staging Point and Large Secondaries I wouldn't need to play with timing =
or with Mode 6.
>> But I'll go through all of them now.
>>=20
>> So my todo will be:
>> 1. Full reset of EC2 parameters
>> 2. Setup timing and check for ?deg @?RPM 3. Set Mode 3 Inj Flow Rate =
4. Set Mode 2 Dynamic Range 5. Set Mode 6 Sec Inj Differential 6. Go to =
WOT and check adjust mixture=20
>>=20
>> A couple more questions for you guys:
>> 1. What plugs are all you other guys using? Do I have some good =
options?
>> 2. Remind me how to set eccentric at TDC?
>> 3. Sounds like EC2's advance curve is not flat, what advance setting =
for what RPM for stock Renesis 4-port?
>> 4. I can't seem to find the command for a global reset the EC2, do I =
need to reset each mode to default, I seem to remember reading of a =
global reset?
>> 5. Tracy, if your around at present, can you confirm any special =
quirks for our 4-port or general tuning?
>>=20
>> Thanks everyone.
>> Much appreciated.
>>=20
>> Steve Izett
>>=20
>>=20
>>=20
>> I'll then check the staging point is at 15.5"
>>=20
>>> On 7 Jan 2016, at 3:22 AM, Jeff Whaley <flyrotary@lancaironline.net> =
wrote:
>>>=20
>>> Steve:
>>> First confirm your timing as per Lynn's comments.
>>> Did you start with every mode set to ZERO? 1 through 9?? Mixture =
knob in center???
>>> Your fuel map is 128 bins wide x 256 bins high as in an X/Y graph, =
with ZERO settings on the vertical scale.
>>> My map is displayed with Ed's EFISM and is 0 to 256 on the vertical =
scale; I think Tracy's EM displays it as -128 to +128.
>>> After setting Mode 3 and Mode 2, all your settings should still read =
either 0 or 128.
>>> At this point, your fuel flow is based on 23" MP and 0 or 128 fuel =
value.
>>> I would expect as you open the throttle that more fuel will be =
required at 30" MP Vs 23" - has always been true with my engine.
>>> Have you confirmed that you actually have a staging-point; i.e., =
where the injectors flip from just PRI to both PRI and SEC? - Very =
important to confirm where it is.
>>> Confirm both Timing and Staging; repeat Modes 3 and 2 then use Mode =
1 to tune fuel bin value at WOT.
>>> Jeff
>>>=20
>>> From:
>>> =09
>>> steve Izett <flyrotary@lancaironline.net>
>>> Subject:
>>> =09
>>> Tuning
>>> Date:
>>> =09
>>> Wed, 6 Jan 2016 07:51:48 +0800
>>> To:
>>> =09
>>> Rotary motors in aircraft <flyrotary@lancaironline.net>
>>> =09
>>> <image001.gif>
>>>=20
>>> <image002.gif>
>>> Hi Guys
>>> Could I get some feedback on process and my thinking here.
>>> I'm seeking to tune in our EC2 Renesis 4 port with Elec adjustable=20=

>>> prop
>>>=20
>>>=20
>>> Steps so far (can only run for 15mins before overheating) OAT is=20
>>> presently 33-40C 91-104F Prop set course
>>>=20
>>> 1. EC2 Injector and Coil diagnostics all good 2. With 2 squirts she=20=

>>> starts well after approx 2-3 revs of the starter.
>>> 3. Run her up to ~23" and adjusted Injector Flow Rate - Mode #3 for=20=

>>> approx Lamba of 1 on Wide Band 4. Set Idle of approx 1200RPM =
Adjusted Injection Dynamic Range - Mode #2 for same.
>>>=20
>>> All OK to this point. Adjustments made in Mode #2 and #3 of EC2 =
reflect clearly on Wideband O2.
>>> Switching between A and B computers makes no difference.
>>>=20
>>> Now opening throttle up gets us to approx 5000 rpm (course Prop) but=20=

>>> its missing as more power comes on and is quite severe. (Not missing=20=

>>> now and then, but constant) Selecting between A and B computers=20
>>> (Backup CAS) makes no difference)
>>>=20
>>>=20
>>> This message, and the documents attached hereto, is intended only =
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original message. Thank you.
>>=20
>> -----Original Message-----
>> From: Jeff Whaley
>> Sent: June-15-20 8:37 AM
>> To: Rotary motors in aircraft
>> Subject: Re: [FlyRotary] EC Staging Point=20
>>=20
>> Hi Steve, yes the original Staging Point was around 15" of MP but in =
later EC2's and EC3's Tracy moved or recommended it up to about 20" ...=20=

>> Steve Boese wrote a simplified tuning method based on this increased =
Staging Point ... check the archives.
>> Mine was originally 15.5" and is now 19.5".
>> Jeff
>>=20
>> Hi Guys
>>=20
>> I did some work on the EC2 last weekend to begin to calibrate the =
fuel flow (Renesis 4 port with standard injectors) The first thing I =
noted waa the Staging Point in near 20" hg.
>> My recollection is that in the default EC3 Staging Point is ~15.5"hg.
>> Can any of you comment on your experiences with this?
>>=20
>> Thanks
>> Steve Izett
>>=20
>>=20
>> OK. How do you search the archive effectively? I've spent hours =
trying to find stuff.
>> What does the filter provide?
>> I thought the search: was for the key search "word" eg. Tuning.
>> But how do I look at all Steve Boese's posts etc?
>>=20
>> Sorry if this is a dumb question.
>> I'm looking for any updated tuning guide.
>>=20
>> Cheers
>>=20
>> Steve
>> <Boese Search.jpg>--
>> Homepage:  http://www.flyrotary.com/
>> Archive and UnSub:   =
http://mail.lancaironline.net:81/lists/flyrotary/List.html
>=20
>=20
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