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black smoke on 12.0 afr

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Old Apr 12, 2011, 01:06 PM
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black smoke on 12.0 afr

my freind drove behind my car today. he called me, my car is smoking on wot.
i have afr gauge. i have 12.0afr on full throttle. how can be possible?

setup:

2.3 stroker
cossie m2 cams
gt3071r atp kit
1100cc injectors
Old Apr 12, 2011, 01:27 PM
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same issue with evo x fic 1100 pump gas 100 octane 11.5 afr !
Old Apr 12, 2011, 02:38 PM
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Do you have piston-to-wall measurement?
Old Apr 12, 2011, 02:59 PM
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Is it pulling clean?
Old Apr 12, 2011, 07:35 PM
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if its a true 12.0 its not abnormal to still see smoke. If its NOT a true 12.0 then thats pretty obvious as to why.
Old Apr 12, 2011, 08:27 PM
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^^what he said you will still have carbon build up at any AFR. Hit the gas and that carbon build up is pushed out.
Old Apr 13, 2011, 06:45 AM
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Originally Posted by JohnBradley
if its a true 12.0 its not abnormal to still see smoke. If its NOT a true 12.0 then thats pretty obvious as to why.
i have aem uego in my car. i installed an innovate lc1 with display. they are shows the same. i think this 12.0 is true. i tryed lean it to 12.5 today. its looks better, but it has some smoke still.
Old Apr 13, 2011, 08:22 AM
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Originally Posted by aronmatic
i tryed lean it to 12.5 today. its looks better, but it has some smoke still.
What fuel are you on?
Old Apr 13, 2011, 08:30 AM
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Originally Posted by raasfaas
What fuel are you on?
I hope he says e85, or some kind of race gas
Old Apr 13, 2011, 08:50 AM
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Exhaust leak showing you leaner AFRs than they actually are?
Old Apr 13, 2011, 09:32 AM
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Obviously this means your running rich... correct me if I am wrong?
Old Apr 13, 2011, 10:42 AM
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i use 100 ron octane fuel. that is equal usa 95 gas.

maybe i have a minor exhaust leak before the o2 sensors, but its very small.

i mapped the car back to 11.7 afr. runs fine and clean, only bad is the black smoke.
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