How lean would I be with these mods?
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If you get to the point of modding your car out more, get an extra bung welded into your downpipe and use a wideband o2 sensor on a dyno to see exactly what your air/fuel ratio is. To be safe you should keep it around 11.5.1 on the dyno because under load (driving on the street) you'll lean out to around 12.0.1........
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i have noticed since i installed my uppipe and downpipe that the car seems to be running very rich....ie raw fuel coming out of exhaust.........I dont forsee a problem with running too lean
I am trying to save for some sort of fuel management, I would like to go with the turboXS or Xede or something else along those lines but they are very expensive, has anyone used the apexi SAFC, if so how effective was that in assisting with dyno tuning? just seems like a cheaper alternative, although it does not control ignition timing or boost i think it may be worth it for the price.
thanks
I am trying to save for some sort of fuel management, I would like to go with the turboXS or Xede or something else along those lines but they are very expensive, has anyone used the apexi SAFC, if so how effective was that in assisting with dyno tuning? just seems like a cheaper alternative, although it does not control ignition timing or boost i think it may be worth it for the price.
thanks
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Originally posted by cwingo
i have noticed since i installed my uppipe and downpipe that the car seems to be running very rich....ie raw fuel coming out of exhaust.........I dont forsee a problem with running too lean
thanks
i have noticed since i installed my uppipe and downpipe that the car seems to be running very rich....ie raw fuel coming out of exhaust.........I dont forsee a problem with running too lean
thanks
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Wrxneffect
Engine/Power - EJ20T (pre-2006 WRX and JDM)
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Dec 11, 2003 09:30 PM
spdkills
Engine/Power - EJ20T (pre-2006 WRX and JDM)
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Jan 23, 2003 08:07 AM



The factory ECU is very very rich from the factory with conservative timing advance too. Dont worry at all.
