X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Sender: To: lml@lancaironline.net Date: Wed, 11 May 2005 21:15:59 -0400 Message-ID: X-Original-Return-Path: Received: from imo-m28.mx.aol.com ([64.12.137.9] verified) by logan.com (CommuniGate Pro SMTP 4.3c5) with ESMTP id 940618 for lml@lancaironline.net; Wed, 11 May 2005 19:24:41 -0400 Received-SPF: pass receiver=logan.com; client-ip=64.12.137.9; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-m28.mx.aol.com (mail_out_v38_r1.7.) id q.1da.3bf70537 (3310) for ; Wed, 11 May 2005 19:23:52 -0400 (EDT) From: Sky2high@aol.com X-Original-Message-ID: <1da.3bf70537.2fb3ee07@aol.com> X-Original-Date: Wed, 11 May 2005 19:23:51 EDT Subject: Electronic Ignition Timing Charts X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1115853831" X-Mailer: 9.0 Security Edition for Windows sub 5000 -------------------------------1115853831 Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable =20 Matt, =20 =20 =20 =20 =20 MAP/kPa MAP/Hg 750 1300 1900 2250 2400 2500 2600 2700 104 30.7 16 17 18 19 21 21 2= 1=20 20 95 28.1 16 18 20 21 22 22 22 21 85 25.1 16 19 21 22 23 23 23 22 75=20 22.1 17 20 22 23 24 24 24 24 70 20.7 17 21 24 25 27 27 27 27 60 17.7 17=20= 22=20 26 30 31 31 31 30 40 11.8 17 23 30 34 35 35 35 34 30 8.9 17 24 31 36 37=20= 37=20 37 36 LSE True Timing Data RPM----> MAP/kPa MAP/Hg 75= 0=20 1300 1900 2250 2400 2500 2600 2700 105.0 31 94.8 28 =20 84.7 25 74.5 22 71.1 21 61.0 18 40.6= 12 =20 30.5 9 LSE True Timing Data RPM----> =20 MAP/kPa MAP/Hg 1000 1700 2250 2400 2500 2600 2700 98.2 29 94.8=20= 28 =20 84.7 25 74.5 22 71.1 21 61.0 18 =20= =20 48.8 14.4 32.5 33.9 10 34.5 Electroair =20 RPM----> MAP/kPa MAP/Hg 750 1300 1900 2250 2400 2500 2600 2700 10= 5.0 31=20 35 18 21 24 24 25 25 25 94.8 28 35 18 21 24 24 25 25 25 84.7 25 35 18 21= =20 24 24 25 25 25 74.5 22 35 22 25 28 28 29 29 29 71.1 21 35 24 27 30 30 31= =20 31 31 61.0 18 35 30 33 36 36 37 37 37 40.6 12 35 42 42 42 42 42 42 42 =20 30.5 9 35 42 42 42 42 42 42 42 Electroair -5 timing RPM----> =20= =20 MAP/kPa MAP/Hg 750 1300 1900 2250 2400 2500 2600 2700 105.0 31 30 13 16=20 19 19 20 21 21 94.8 28 30 13 16 19 19 20 21 21 84.7 25 30 13 16 19 19 20= 21=20 21 74.5 22 30 17 20 23 23 24 25 25 71.1 21 30 19 22 25 25 26 27 27 61.= 0=20 18 30 25 28 31 31 32 33 33 40.6 12 30 37 40 42 42 42 42 42 30.5 9 30 42=20 42 42 42 42 42 42 Note: 16 BTDC base timing reduced to 11 BTDC See= =20 CAF=C9 Ignition articles. =20 Electroair timings were computed according to the CAFE ignition articles. =20= I=20 don't know if they are completely accurate. Matt, I question your timings=20 for 750 RPM - every one else would use 30-35 degrees BTDC. The next report= =20 will be on Baseline data I collect from my system. I might even mention ho= w=20 fast I am going. =20 BTW, mixture is an apparent timing shift. Rich burns faster than lean. =20 So....... =20 LOP, lower MAP - advanced spark delivers power at the right time. ROP,=20 higher MAP - means less advance or even retard. This may be why my LASAR s= ystem=20 showed slight improvement at 8000-9000 MSL (24-23 MAP) when the backup mags= =20 (25 deg) were used instead of the advanced spark electronic part of the=20 system. Also, why the "less aggressive" IO360 controller was slightly bett= er than=20 the O320. I always ran ROP when those tests were done. =20 When the weather clears, I will be filling out my matrix with data collecte= d=20 in my aircraft/engine configuration. =20 I love experimentation. Flying just makes you think about it more before=20 entering the air. =20 =20 Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Training is no substitute for fear,risk analysis and judgement. Recognize the links in the chain of errors before the last link joins to th= e=20 anchor. In aviation, as in life, nothing fixes itself. There ain't no tow truck when you are positive AGL. -------------------------------1115853831 Content-Type: text/html; charset="ISO-8859-1" Content-Transfer-Encoding: quoted-printable
104 16 17 18 19 21 21 21 20 95 16 18 20 21 22 22 22 21 85 16 19 21 22 23 23 23 22 75 17 20 22 23 24 24 24 24 70 17 21 24 25 27 27 27 27 60 17 22 26 30 31 31 31 30 40 17 23 30 34 35 35 35 34 30 17 24 31 36 37 37 37 36 LSE True Timing Data RPM----> 31 28 25 22 21 18 12 9 LSE True Timing Data RPM----> 29 28 25 22 21 18 14.4 32.5 10 34.5 Electroair RPM----> = 31 35 18 21 24 24 25 25 25 28 35 18 21 24 24 25 25 25 25 35 18 21 24 24 25 25 25 22 35 22 25 28 28 29 29 29 21 35 24 27 30 30 31 31 31 18 35 30 33 36 36 37 37 37 12 35 42 42 42 42 42 42 42 9 35 42 42 42 42 42 42 42 Electroair -5 timing RPM----> 31= 30 13 16 19 19 20 21 21 28 30 13 16 19 19 20 21 21 25 30 13 16 19 19 20 21 21 22 30 17 20 23 23 24 25 25 21 30 19 22 25 25 26 27 27 18 30 25 28 31 31 32 33 33 12 30 37 40 42 42 42 42 42 9 30 42 42 42 42 42 42 42 Note: 16 BTDC base timing reduced= to 11=20 BTDC  See CAF=C9 Ignition=20 articles.
Matt, 
 
 
 
 
MAP/kPa
 MAP/Hg 750 1300 1900 2250 2400 2500 2600 2700
30.7
28.1
25.1
22.1
20.7
17= .7
11.8
8.9=
MAP/kPa MAP/Hg 750 1300 1900 2250 2400 2500 2600 2700
105.0
94.8
84.7
74.5
71.1
61.0
40.6
30.5
MAP/kPa MAP/Hg 1000 1700 2250 2400 2500 2600 2700
98.2
94.8
84.7
74.5
71.1
61.0
48.8
33.9
MAP/kPa MAP/Hg 750 1300 1900 2250 2400 2500 2600 2700
105.0
94.8
84.7
74.5
71.1
61.0
40.6
30.5
MAP/kPa MAP/Hg 750 1300 1900 2250 2400 2500 2600 2700
105.0
94.8
84.7
74.5
71.1
61.0
40.6
30.5
 
 
Electroair timings were computed according to the CAFE ignition=20 articles.  I don't know if they are completely accurate.  Matt, I=20 question your timings for 750 RPM - every one else would use 30-35 degrees=20 BTDC.  The next report will be on Baseline data I collect from my=20 system.  I might even mention how fast I am going.
 
BTW, mixture is an apparent timing shift.  Rich burns faster than=20 lean.  So....... =20
 
LOP, lower MAP - advanced spark delivers power at the right=20 time.  ROP, higher MAP - means less advance or even retard. =20= This=20 may be why my LASAR system showed slight improvement at 8000-9000 MSL (24-23= =20 MAP) when the backup mags (25 deg) were used instead of the advanced spark=20 electronic part of the system.  Also, why the "less aggressive" IO360=20 controller was slightly better than the O320.  I always ran ROP when th= ose=20 tests were done.
 
When the weather clears, I will be filling out my matrix with data=20 collected in my aircraft/engine configuration.
 
I love experimentation.  Flying just makes you think about it more= =20 before entering the air.
 
 
Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL=20 (KARR)

Training is no substitute for fear,risk analysis and=20 judgement.
Recognize the links in the chain of errors before the last lin= k=20 joins to the anchor.
In aviation, as in life, nothing fixes itself.
Th= ere=20 ain't no tow truck when you are positive=20 AGL.

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