Afr per lb of boost
Thread Starter
Teching In
Joined: Jan 2007
Posts: 30
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Afr per lb of boost Street tuning my ls2 with twins and 12 lbs. I have my pe coming on 3500 and a gradual rise from 1.10 eq at 105 map to 1.3 eq at 205 map
it runs rich down low and my lamda curve on the wide band is .84. I was wanting to know say at 4000rpm and 140/150kpa what you guys run as an afr and curve up from there for now I am gonna move the activation rpm up to 4000 to try and avoid the rich smoke and sputtering down low but it will go lean a bit as my twins build boost fast ,need this sorted before I go to 20 lbs, thanks in advance also I will richen to .80 lambda above 150kpa
so asked another way is there a afr chart vs boost that one can use for Ls style engines
it runs rich down low and my lamda curve on the wide band is .84. I was wanting to know say at 4000rpm and 140/150kpa what you guys run as an afr and curve up from there for now I am gonna move the activation rpm up to 4000 to try and avoid the rich smoke and sputtering down low but it will go lean a bit as my twins build boost fast ,need this sorted before I go to 20 lbs, thanks in advance also I will richen to .80 lambda above 150kpa
so asked another way is there a afr chart vs boost that one can use for Ls style engines
Last edited by nitrouspaul; Jul 19, 2021 at 09:02 AM.
Thread Starter
Teching In
Joined: Jan 2007
Posts: 30
Likes: 0
All depends on how much timing you put in it. You can run leaner with less timing or fatter with more. You dont really need anything richer than NA PE until you're over a couple psi. if you put some timing into it in that region it'll light off faster too.
Street tuning my ls2 with twins and 12 lbs. I have my pe coming on 3500 and a gradual rise from 1.10 eq at 105 map to 1.3 eq at 205 map
it runs rich down low and my lamda curve on the wide band is .84. I was wanting to know say at 4000rpm and 140/150kpa what you guys run as an afr and curve up from there for now I am gonna move the activation rpm up to 4000 to try and avoid the rich smoke and sputtering down low but it will go lean a bit as my twins build boost fast ,need this sorted before I go to 20 lbs, thanks in advance also I will richen to .80 lambda above 150kpa
so asked another way is there a afr chart vs boost that one can use for Ls style engines
it runs rich down low and my lamda curve on the wide band is .84. I was wanting to know say at 4000rpm and 140/150kpa what you guys run as an afr and curve up from there for now I am gonna move the activation rpm up to 4000 to try and avoid the rich smoke and sputtering down low but it will go lean a bit as my twins build boost fast ,need this sorted before I go to 20 lbs, thanks in advance also I will richen to .80 lambda above 150kpa
so asked another way is there a afr chart vs boost that one can use for Ls style engines
