AFR for max power in diesel engines

by **nagliy_root** » Thu Jun 20, 2013 1:35 am

Hi. Thats an interesting quistion. What Afr for max power in diesel engines? Where car produse not much smoke and best power output. stoichiometric is 14.5 there the lamba value is 1 for diesel engines. If we set afr to 13,8 what do we get?

by **zok** » Thu Jun 20, 2013 6:40 pm

you get lots of smoke. Stick to around 17-18:1. 17,5:1 for the most interesting result. Lower ratio produces smoke, higher ratio doesn't enable to get the most power of your engine.

by **nagliy_root** » Fri Jun 21, 2013 9:39 am

i think that you are not right, i set afr to 14.7 in bmw 335d e60 - no visible smoke - may be a little. - car and dpf delete in this car

by **nagliy_root** » Fri Jun 21, 2013 11:45 am

cat and dpf and egr delete

by **donesko** » Fri Jun 28, 2013 10:13 pm

nagliy_root wrote:Hi. Thats an interesting quistion. What Afr for max power in diesel engines? Where car produse not much smoke and best power output. stoichiometric is 14.5 there the lamba value is 1 for diesel engines. If we set afr to 13,8 what do we get?

for racing only i use 12.5 , it smokes so much it leves a permanent trail on road but gets more power than with 14.5 , and also egt is too high but for drag race who cares