 1-2-3 Ignition Settings, Whats the difference between Curves 2 and 3 ? |
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| jim_hoyland |
 Mar 28 2019, 10:50 AM
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#1
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Get that VIN ?  Group: Members Posts: 9,319 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California 
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I had the 1-2-3 installed last week and the performance is noticeable improved; based on the chart below, what would be the difference between Curve 2 and Curve 3 ?
My '75 L-Jet has the 2L crank, 96mm Pistons, and a larger Vanagon TB So, it feels good on curve 2, what might happen going to curve 3 ? Attached thumbnail(s) 
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| 914_teener |
Mar 29 2019, 09:22 AM
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#2
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914 Guru Group: Members Posts: 5,205 Joined: 31-August 08 From: So. Cal Member No.: 9,489 Region Association: Southern California |
Timing advance is stated in relationship to engine revolutions or rpm.s which is timing.
From the 123 chart and to Jim,s question, curve 3 will add 1 more degree of advance up to 3400 rpms instead of 2700 rpm. So a slighty different curve. |
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| jim_hoyland |
Mar 29 2019, 11:55 AM
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#3
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Get that VIN ? Group: Members Posts: 9,319 Joined: 1-May 03 From: Sunset Beach, CA Member No.: 643 Region Association: Southern California
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QUOTE(914_teener @ Mar 29 2019, 08:22 AM)  Timing advance is stated in relationship to engine revolutions or rpm.s which is timing. From the 123 chart and to Jim,s question, curve 3 will add 1 more degree of advance up to 3400 rpms instead of 2700 rpm. So a slighty different curve. Would curve 3 be more appropriate ?; and, can the curve selector be accessed while the distributer is mounted ? |
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Posts in this topic
jim_hoyland 1-2-3 Ignition Settings Mar 28 2019, 10:50 AM
maf914 Okay. I am not an ignition expert, but the max ad... Mar 29 2019, 07:14 AM
jim_hoyland
Okay. I am not an ignition expert, but the max a... Mar 29 2019, 07:49 AM restore2seater
IIRC, Ed at 1-2-3 said one has to add 10 to those... Mar 29 2019, 08:11 AM jim_hoyland
IIRC, Ed at 1-2-3 said one has to add 10 to thos... Mar 29 2019, 08:58 AM michael7810 I’m not an expert and am trying to understand be... Mar 29 2019, 09:10 AM 914_teener
Timing advance is stated in relationship to engi... Mar 29 2019, 01:40 PM DRPHIL914 is the vac connected or are you running with out, ... Mar 29 2019, 12:56 PM jim_hoyland
is the vac connected or are you running with out,... Mar 29 2019, 02:32 PM |
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