air fuel ratio question
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had car on rolling road and the a.f.r was at 10 on chart he said this is rich. i have researched and alot of people saying they run rich from factory?? is this correct.. will i get bore wash from this afr ??
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cheers for quick replys chaps. he said it was perfect on idle a cruising. but drop to 10 on WOT. So is this ok or will i get bore wash or other problems??? there is no black smoke or anything on boost. and car runs perfect?
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I took it to a very respected tuner and he test drove the car and he felt it was running sweet so I'd deffo get the car checked for boost leaks etc.
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am i worrying to much? is 10.afr @WOT ok for imprezas
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so could i just increase boost ever so slightly. say 1-2psi?? would this lean it out a little?
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9.5 AFR is too rich and I wouldn't run that car,yes but off the boost,until car is mapped
Please have look on this
http://www.enginemapper.co.uk/Engine...Guide_V1.1.pdf
Do you trying map yourself yours car ?
If yes do you using det cans and Wideband gauge ?
Jura
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low tens are fine, thats how subaru mapped them on wot. your worrying the chap unnecessary. the car will be in closed loop most of the time and theres plenty other target afrs between maximum load&revs. Far better being rich than lean.
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cheers euan. i cant be running that rich as my car runs fine, it does'nt splutter or anythink on boost. and i get no smoke whatsoever on tickover or on boost. and i cannot smell fuel. :-)
Last edited by markb5888; 04 February 2014 at 02:54 PM.
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The trick about mapping is to get it right everywhere. It's about the numbers in the boxes. An AFR of 10 won't hurt at full throttle, but the car will perform better on 11.
In conclusion, probably nothing wrong with it, but could do better!
In conclusion, probably nothing wrong with it, but could do better!
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I've replied in your other thread. I mapped mine with ESL, the base map for my 97 classic is rich from the factory. I was getting good AFR even before I mapped it. I'd say 2psi more boost will be ok.
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