Anyone on here running e85 on their carb setups? Right now my carb is on 84s primary and secondary jets. I have 2 widebands, one for each bank. I noticed my right bank is about .5 higher in AFR than the left. at idle it starts at about 15 on the AFRs. after I rev it up some, they go about 17-18. so im swapping out to 90s primary and 92s secondary and see what that does. but as far as shooting for a target AFR, what would be a good number? Using the scale, what lamba should I be going for at idle, vs. wot? Thanx in advance


Lambda E85 AFR Gas AFR
0.500 4.880 7.350
0.510 4.978 7.497
0.520 5.075 7.644
0.530 5.173 7.791
0.540 5.270 7.938
0.550 5.368 8.085
0.560 5.466 8.232
0.570 5.563 8.379
0.580 5.661 8.526
0.590 5.758 8.673
0.600 5.856 8.820
0.610 5.954 8.967
0.620 6.051 9.114
0.630 6.149 9.261
0.640 6.246 9.408
0.650 6.344 9.555
0.660 6.442 9.702
0.670 6.539 9.849
0.680 6.637 9.996
0.690 6.734 10.143
0.700 6.832 10.290
0.710 6.930 10.437
0.720 7.027 10.584
0.730 7.125 10.731
0.740 7.222 10.878
0.750 7.320 11.025
0.760 7.418 11.172
0.770 7.515 11.319
0.780 7.613 11.466
0.790 7.710 11.613
0.800 7.808 11.760
0.810 7.906 11.907
0.820 8.003 12.054
0.830 8.101 12.201
0.840 8.198 12.348
0.850 8.296 12.495
0.860 8.394 12.642
0.870 8.491 12.789
0.880 8.589 12.936
0.890 8.686 13.083
0.900 8.784 13.230
0.910 8.882 13.377
0.920 8.979 13.524
0.930 9.077 13.671
0.940 9.174 13.818
0.950 9.272 13.965
0.960 9.370 14.112
0.970 9.467 14.259
0.980 9.565 14.406
0.990 9.662 14.553
1.000 9.760 14.700
1.010 9.858 14.847
1.020 9.955 14.994
1.030 10.053 15.141
1.040 10.150 15.288
1.050 10.248 15.435
1.060 10.346 15.582
1.070 10.443 15.729
1.080 10.541 15.876
1.090 10.638 16.023
1.100 10.736 16.170
1.110 10.834 16.317
1.120 10.931 16.464
1.130 11.029 16.611
1.140 11.126 16.758
1.150 11.224 16.905
1.160 11.322 17.052
1.170 11.419 17.199
1.180 11.517 17.346
1.190 11.614 17.493
1.200 11.712 17.640

 

is your wideband programmed to output Gas afr values or e85 values... the reason is the wideband only reads the lambda value. so if it see's lambda 1.0 and its programmed for gas afr , its going to output 14.7 afr. therefore even though in reality the real afr is 9.76.

 

yes it is programmed for gas afrs. so im using the chart to see what actual afr im at on e85. my question is what lambda should I shoot for at idle and wot? That way if I need a lambda of .800, ill shoot for 11.760 on the gauge knowing im at 7.808 actual afr on e85.

 

Also, how would I know what a good starting point would be for my timing? im using the supplied #1 pill right now on the 6010 with br7ef ngks. my setup is a 383 ls1, lunati RA, -2cc valve reliefes, AI heads and cam, heads milled to 58cc. super vic, holley 850. cam is .626/.626, @ 270/ 278, (239/249 @.050) 112 lsa, 2.3+

 

Have you tried swapping O2 sensors from side to side to see if it was the gauge or sensor ?

 

I run e85 and leave my afr in gas equivalent, wot i,m 11.7-12.0 (makes fraction more torque on the lean side. Only run one on side of #1 piston. Friend runs duals and drivers side also reads fractionally higher

On my mild 6.0 I run a custom modified 850 holley by eric at horsepower innovations, 97/105 jets, big 150 ti needle and seat, 6.5 pv. Can see all detailsbon carb database. I run locked out dizzy ~26degs