Whats the leanest one of these LS1 can physically start/hold idle?
04-28-2006, 04:51 AM
#1
Whats the leanest one of these LS1 can physically start/hold idle? Lets get technical 
I have messed with a couple things in my tune and now on startup it shows like 19-21.0:1 for a couple of minutes and then drops to 14.7:1 when closed loop is enabled. The wierd thing is that if I give it gas the AFR will jump down to a little better 15.5:1 and if I let off again it will go back up to 19-21.0:1 range. This just made me wonder how high it CAN actually run.
I have messed with a couple things in my tune and now on startup it shows like 19-21.0:1 for a couple of minutes and then drops to 14.7:1 when closed loop is enabled. The wierd thing is that if I give it gas the AFR will jump down to a little better 15.5:1 and if I let off again it will go back up to 19-21.0:1 range. This just made me wonder how high it CAN actually run. 
04-28-2006, 08:07 AM
#2
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22:1 - 23:1 is doable but rough and you get plenty of misfires.
Actually I think the misfires start showing up in the 16:1 range, but get worse of course.
Your air injection isn't still functioning is it?
Actually I think the misfires start showing up in the 16:1 range, but get worse of course.
Your air injection isn't still functioning is it?
04-28-2006, 08:18 AM
#3
Originally Posted by white2001s10
22:1 - 23:1 is doable but rough and you get plenty of misfires.
Actually I think the misfires start showing up in the 16:1 range, but get worse of course.
Your air injection isn't still functioning is it?
Actually I think the misfires start showing up in the 16:1 range, but get worse of course.
Your air injection isn't still functioning is it?
04-28-2006, 08:33 AM
#4
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Engines are normally lean on first start-up, hence the start-up (after start) enrichment tables.
If you want to change the AFR during the first seconds after starting you'll need to adjust the after-start enrichment and decay.
If you want to change the AFR during the first seconds after starting you'll need to adjust the after-start enrichment and decay.
04-28-2006, 08:34 AM
#5
Originally Posted by white2001s10
Engines are normally lean on first start-up, hence the start-up (after start) enrichment tables.
If you want to change the AFR during the first seconds after starting you'll need to adjust the after-start enrichment and decay.
If you want to change the AFR during the first seconds after starting you'll need to adjust the after-start enrichment and decay.
