Apex-i S-AFC NEO
#16
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Ok, so I'd still need a wideband even if the dyno has a lambda reader? I think I'm content with sticking with the stock injectors for the time being, so I'll be picking up an S-AFC II or NEO this week and hopefully that will be sufficient in getting a nice tune for good power and smooth driveability. I heard the S-AFC models can also compensate for a blow off that vents to the atmoshphere, so hopefully that will go well also since I have an HKS SSQV to add to the BL stage 1 kit.
#17
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So I guess this is the reason that you'd want a wideband, huh? That way you'd really be adle to watch the air and fuel to make sure there's not an unsafe amount of airflow out to cause advancing in timing? I'm sorry for the noob feel I must be giving off, but I'm just trying to figure this all out and make the right conclusions from what I've learned.
Thank you to everyone who added to the thread.
Thank you to everyone who added to the thread.
#18
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Thanks a lot TTSC3 for all of the help. So after tuning a lot of cars have you run into a situation similar to mine where it's just the turbo kit (BL stage 1 in my case), a blow off, and a piggy back fuel controller? Also, which of the S-AFC models would you recommend as I'm sure you've had experiences with a few different ones? From a tuner's standpoint which is the best? Thanks.
#19
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Thanks a lot TTSC3 for all of the help. So after tuning a lot of cars have you run into a situation similar to mine where it's just the turbo kit (BL stage 1 in my case), a blow off, and a piggy back fuel controller? Also, which of the S-AFC models would you recommend as I'm sure you've had experiences with a few different ones? From a tuner's standpoint which is the best? Thanks.
#21
#26
#27
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Cool, I'll do the search for the new ones. Also, if I weld on an HKS SSQV and vent it to the atmospere I heard that I will have a problem with stalling when going from cruising speeds to a stop. Also, reving it up past 4k rpms and letting off will cause a stall out as well. Is this going to be an issue if I just put the kit on without the BOV? Have you encountered this issue when working on any other 2jz NA-T setups?
#28
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Cool, I'll do the search for the new ones. Also, if I weld on an HKS SSQV and vent it to the atmospere I heard that I will have a problem with stalling when going from cruising speeds to a stop. Also, reving it up past 4k rpms and letting off will cause a stall out as well. Is this going to be an issue if I just put the kit on without the BOV? Have you encountered this issue when working on any other 2jz NA-T setups?
it has to do with air metering... stock ECU'd turbo eclipses do the same thing...
when air enters the intake system, it is metered by a mass air flow meter (or similar, depending on car)... once it's been metered, the ecu knows it is in the system and adds fuel for it... in a stock operating style setup, the air that is vented by a BOV/BPV goes back into the intake system pre-turbo but after the mass air flow sensor (the has already been counted)...
when you run a vent to atmosphere valve, the ecu still thinks that air is in the system, so it causes a momentary rich condition... enough to stall a car if throttle isn't applied...
the s-afc2 has a throttle decel function that is supposed to make up for this, but I never was able to make it work well, so I just ran a stock style bov - vented back to the intake, and zero problems...
#29
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it has to do with air metering... stock ECU'd turbo eclipses do the same thing...
when air enters the intake system, it is metered by a mass air flow meter (or similar, depending on car)... once it's been metered, the ecu knows it is in the system and adds fuel for it... in a stock operating style setup, the air that is vented by a BOV/BPV goes back into the intake system pre-turbo but after the mass air flow sensor (the has already been counted)...
when you run a vent to atmosphere valve, the ecu still thinks that air is in the system, so it causes a momentary rich condition... enough to stall a car if throttle isn't applied...
the s-afc2 has a throttle decel function that is supposed to make up for this, but I never was able to make it work well, so I just ran a stock style bov - vented back to the intake, and zero problems...
when air enters the intake system, it is metered by a mass air flow meter (or similar, depending on car)... once it's been metered, the ecu knows it is in the system and adds fuel for it... in a stock operating style setup, the air that is vented by a BOV/BPV goes back into the intake system pre-turbo but after the mass air flow sensor (the has already been counted)...
when you run a vent to atmosphere valve, the ecu still thinks that air is in the system, so it causes a momentary rich condition... enough to stall a car if throttle isn't applied...
the s-afc2 has a throttle decel function that is supposed to make up for this, but I never was able to make it work well, so I just ran a stock style bov - vented back to the intake, and zero problems...