What lambda for E85 and meth for 11-12psi?
11-10-2013, 07:59 AM
#2
Well bud, I think you are really close... my records say .73 is as deep as you go with a twin turbo, single turbo with your psi .75. I would say your .73 is really safe and would aim for that spot dead on
11-10-2013, 10:13 AM
#5
Here's what I have....
0.730 7.125 10.731 @ Max Power Multi Turbo
0.740 7.222 10.878
0.750 7.320 11.025 @ Supercharged/Turbo
0.760 7.418 11.172
0.770 7.515 11.319 @ Max Power NA
0.780 7.613 11.466
0.790 7.710 11.613
0.800 7.808 11.760 @ Consistant Race
0.810 7.906 11.907
0.820 8.003 12.054
0.830 8.101 12.201
0.840 8.198 12.348 @ Part throttle RACE
0.850 8.296 12.495
0.860 8.394 12.642
0.870 8.491 12.789 @ Idle
0.880 8.589 12.936
0.890 8.686 13.083
0.900 8.784 13.230
0.910 8.882 13.377 @ Part throttle STREET (economy)
0.730 7.125 10.731 @ Max Power Multi Turbo
0.740 7.222 10.878
0.750 7.320 11.025 @ Supercharged/Turbo
0.760 7.418 11.172
0.770 7.515 11.319 @ Max Power NA
0.780 7.613 11.466
0.790 7.710 11.613
0.800 7.808 11.760 @ Consistant Race
0.810 7.906 11.907
0.820 8.003 12.054
0.830 8.101 12.201
0.840 8.198 12.348 @ Part throttle RACE
0.850 8.296 12.495
0.860 8.394 12.642
0.870 8.491 12.789 @ Idle
0.880 8.589 12.936
0.890 8.686 13.083
0.900 8.784 13.230
0.910 8.882 13.377 @ Part throttle STREET (economy)
11-10-2013, 10:20 AM
#6
Here's what I have....
0.730 7.125 10.731 @ Max Power Multi Turbo
0.740 7.222 10.878
0.750 7.320 11.025 @ Supercharged/Turbo
0.760 7.418 11.172
0.770 7.515 11.319 @ Max Power NA
0.780 7.613 11.466
0.790 7.710 11.613
0.800 7.808 11.760 @ Consistant Race
0.810 7.906 11.907
0.820 8.003 12.054
0.830 8.101 12.201
0.840 8.198 12.348 @ Part throttle RACE
0.850 8.296 12.495
0.860 8.394 12.642
0.870 8.491 12.789 @ Idle
0.880 8.589 12.936
0.890 8.686 13.083
0.900 8.784 13.230
0.910 8.882 13.377 @ Part throttle STREET (economy)
0.730 7.125 10.731 @ Max Power Multi Turbo
0.740 7.222 10.878
0.750 7.320 11.025 @ Supercharged/Turbo
0.760 7.418 11.172
0.770 7.515 11.319 @ Max Power NA
0.780 7.613 11.466
0.790 7.710 11.613
0.800 7.808 11.760 @ Consistant Race
0.810 7.906 11.907
0.820 8.003 12.054
0.830 8.101 12.201
0.840 8.198 12.348 @ Part throttle RACE
0.850 8.296 12.495
0.860 8.394 12.642
0.870 8.491 12.789 @ Idle
0.880 8.589 12.936
0.890 8.686 13.083
0.900 8.784 13.230
0.910 8.882 13.377 @ Part throttle STREET (economy)
11-10-2013, 07:26 PM
#7
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With meth, I always start off rich (around .75) on the first pulls and most end up around .80 when finished - but, the only way to know for sure is to put it on a dyno and gradually lean it out until you get no increase in power/torque, and then go back to the last setting where it gained power/torque. With meth (and even more so with meth and E85), you don't need to run overly rich to cool the charge like you do with pump gas alone...
The chart above would be what I would consider a starting point. Every combination is going to be different so the only way to know is with dyno data...
The chart above would be what I would consider a starting point. Every combination is going to be different so the only way to know is with dyno data...
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11-11-2013, 05:19 AM
#9
With meth, I always start off rich (around .75) on the first pulls and most end up around .80 when finished - but, the only way to know for sure is to put it on a dyno and gradually lean it out until you get no increase in power/torque, and then go back to the last setting where it gained power/torque. With meth (and even more so with meth and E85), you don't need to run overly rich to cool the charge like you do with pump gas alone...
The chart above would be what I would consider a starting point. Every combination is going to be different so the only way to know is with dyno data...
The chart above would be what I would consider a starting point. Every combination is going to be different so the only way to know is with dyno data...
11-11-2013, 09:03 AM
#11
E85 plus Meth I find it doesn't really give too much of a **** power wise, probably because they are both alcohol based fuels and love to overfuel. I hardly see any difference in power between 10.5-11.5 on the gas scale, .72-.78 in Lambda. Keep in mind that what is good on the dyno isn't necessarily good on the street under more load and for this very reason I keep it a bit more rich, well that and the changing weather conditions will affect your a/f ratio no matter what with two fuel sources. If you like to chase your tail keep trying for that perfect a/f, but it will change by tonight.
11-11-2013, 06:43 PM
#13
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One thing I left out - best to use a load bearing dyno so you don't have the problem mentioned above - if tuned properly on a load dyno, there will be no difference in lambda when you go from the dyno to the street... And the weather won't change lambda in a tune that is done properly either - that should be taken into account...
11-11-2013, 09:49 PM
#14
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So I have my AFR at 11.5 at WOT. 11.3 slowed it down and so did 11.6 I run E85 and no meth but with an intercooler. According to the chart I should be able to get much more power running richer. If I am not is it because I need to adjust my timing some, use different plugs, etc.. or does it just work that way sometimes? I am 8.5 compression 370 with forged pistons, rods, stock 799 heads. I spin it to 6500. Just trying to learn. Cam is a tick performance. low 230's on a 114 right at .600 lift.
11-12-2013, 08:46 AM
#16
One thing I left out - best to use a load bearing dyno so you don't have the problem mentioned above - if tuned properly on a load dyno, there will be no difference in lambda when you go from the dyno to the street... And the weather won't change lambda in a tune that is done properly either - that should be taken into account...