Do I need to richen or lean my fuel?
06-26-2002, 07:32 AM
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Do I need to richen or lean my fuel?
I took the car to the Dyno and the A/F was 11.5 : 1. I think I need to be closer to 12 : 1 but how? How should my setting be (generally) on the AFC?
I have the DRAG III kit
AEM Fuel Rail
S-AFC
MSD-BTM
Thanks
I have the DRAG III kit
AEM Fuel Rail
S-AFC
MSD-BTM
Thanks
06-26-2002, 07:46 AM
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Re: Do I need to richen or lean my fuel? (93LSivic)
Keep where its at 
06-26-2002, 07:50 AM
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Re: Do I need to richen or lean my fuel? (Dutchie)
I agree with that, but if you want closer to 12:1, you need to lean it out a bit. Why didn't you tune the AFC on the dyno?
06-26-2002, 07:55 AM
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Re: Do I need to richen or lean my fuel? (PssshhhMr2)
nope....look at it again. say you have 20 parts air to one part fuel so 20/1 = 20....thats a lot of air to little fuel. now say you have 10 parts air to 1 part fuel= 10 thats too little air to fuel...so you would be really rich.....stoich is 14.7 parts air to one part fuel if i remember correctly. hope that helps PssshhhMR2
06-26-2002, 07:55 AM
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Re: Do I need to richen or lean my fuel? (PssshhhMr2)
I agree with that, but if you want closer to 12:1, you need to lean it out a bit. Why didn't you tune the AFC on the dyno?
Wouldn't you need to "richen" the car in order to get a higher A/F ratio?? Not sure if you made a typo or not.
Wouldn't you need to "richen" the car in order to get a higher A/F ratio?? Not sure if you made a typo or not.
to richen it the he would be trying to lower the number..but 12:1 is leaner than 11.5:1.. make sense?
06-26-2002, 08:07 AM
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Re: Do I need to richen or lean my fuel? (BlwnBlue)
Ahh, ok I had it backwards. 12lbs of air to 1 gallon of fuel...Thats what the explanation is supposed to be. Thanks guys.
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06-26-2002, 08:11 AM
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Re: Do I need to richen or lean my fuel? (PssshhhMr2)
Ahh, ok I had it backwards. 12lbs of air to 1 gallon of fuel...Thats what the explanation is supposed to be. Thanks guys.
06-26-2002, 08:13 AM
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Re: Do I need to richen or lean my fuel? (X2BOARD)
Yeah, first part is air then fuel....From what I have read its lbs of air/gallon of fuel. I could be wrong.
06-26-2002, 08:17 AM
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Re: Do I need to richen or lean my fuel? (TURBOED-TEG)
I would leave it where its at. its hot right now, and your A/F is gonna be richer then normal. When it gets colder u could lean out if u dont give yourself enough leway.
06-26-2002, 08:25 AM
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Re: Do I need to richen or lean my fuel? (DIRep972)
I don't mean to get off topic here but where do your exhaust gas temeratures usually sit at when your A/F is 11.5 : 1 (crusing, full-throttle)?
Adi
06-26-2002, 10:28 AM
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Re: Do I need to richen or lean my fuel?
Currently the car is at about 1200 degrees FEHRENHEIT while on the interstate cruising at 70MPH - At stop lights it drops to 800 and while boosting it gets close to 1300-1400 FEHRENHEIT (spelling is wrong but oh well).
06-26-2002, 10:31 AM
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Re: Do I need to richen or lean my fuel? (TURBOED-TEG)
Currently the car is at about 1200 degrees FEHRENHEIT while on the interstate cruising at 70MPH - At stop lights it drops to 800 and while boosting it gets close to 1300-1400 FEHRENHEIT (spelling is wrong but oh well).
06-26-2002, 11:28 AM
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Re: Do I need to richen or lean my fuel? (TURBOED-TEG)
where is your egt probe tapped? on one of the runners? Anyone remember the conversion process from F to C?
06-26-2002, 12:00 PM
#16
Re: Do I need to richen or lean my fuel? (dustin)
Currently the car is at about 1200 degrees FEHRENHEIT while on the interstate cruising at 70MPH - At stop lights it drops to 800 and while boosting it gets close to 1300-1400 FEHRENHEIT (spelling is wrong but oh well).
Perfect numbers.
Perfect numbers.
Thanks,
Adi
06-26-2002, 12:08 PM
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Re: Do I need to richen or lean my fuel? (newgsr)
Currently the car is at about 1200 degrees FEHRENHEIT while on the interstate cruising at 70MPH - At stop lights it drops to 800 and while boosting it gets close to 1300-1400 FEHRENHEIT (spelling is wrong but oh well).
Perfect numbers.
I tuned my car to the best of my ability and I have about the same numbers 1250 when I'm crusing or interstate driving and at full throttle it usually doesn't go above 1400 but my car is running richer than crap, can someone suggest something here. And yes my ignition timing is stock and the boost is sitting at 13.5psi....
Thanks,
Adi
Perfect numbers.
I tuned my car to the best of my ability and I have about the same numbers 1250 when I'm crusing or interstate driving and at full throttle it usually doesn't go above 1400 but my car is running richer than crap, can someone suggest something here. And yes my ignition timing is stock and the boost is sitting at 13.5psi....
Thanks,
Adi
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