ecu fine tuning ????????

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mixeds14
Posts: 601
Joined: Tue Feb 26, 2008 12:44 pm
Car: 240
Location: nc

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so i finally got my wideband installed n my afrs kind of weird, i have a safc to fine tune it but i dont know were to even begin. do u tune it like if i had a stock ecu?????? were you guys get the lo/hi trottle #s????? can anyone point me in the right direction......

my current setup is: bottom mounts14 t28z32 maf(suck thrue)sr 370ccgreddy type rs bov aptmosphereic (yeah the car wants to stall when idlin down)adjustable fpr set at 35 on idleaem widebands13 ecu with emance daugtherboard/chip/conv.hardness255 walpro3"catbackngk brk6e gap at 35 as it sets when i start the car my boost gauge reads 25-30 vac the afrs are like this: from a cold start it revs to 1200 or so at 15.4-16.2then it drops 800-1000rpms with 15.4 (now im givin it gas not drivin it)

1000rpms 15.42000rpms 14.1-14.63000rpms 14.34000rpms 12.3-13.55000rpms 12.16000rpms+++++++ 12-11-10.2

but what gets to me is that while i hit the gas to get the rpms stated above the gauge kind of jumps around until i hit the rpm then it stays.....i dont know the first thing about the safc thats why im asking for your help(downloaded the manual but its kind of difficult for me to understand it) i dont know how to get the throtle #s or how to get the corection #s ect. the only thing i know is how to set the sensor type n thats it.(2in2out).

if anyone has the same setup, how about givin me your info so i have something to go by..... it seems that while i give it gas it wants to choke(i guess) so i have to give it gas kind of slow

are thpse afrs safe to drive on????????????? i would really apreciate your help n if u need more info please let me know...........n THANKS in advance
Modified by mixeds14 at 7:24 PM 3/27/2009


airman86
Posts: 320
Joined: Wed Feb 11, 2009 4:55 pm

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an afr of 10.2 is kind of on an extreme. most people shoot for around 11.2-11.5 on full boost.

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480sx
Posts: 4085
Joined: Sun Nov 12, 2006 5:27 pm
Car: 1996 Pearl White 240sx

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Out of boost, cruising around town, you want 14-15 AFR.

Transition between boost and vac, you want 13-14 AFR.

In boost, you want 12.5. The range is 12-13, but 12.5 to 12 is safe as long as your timing maps are good.

mixeds14
Posts: 601
Joined: Tue Feb 26, 2008 12:44 pm
Car: 240
Location: nc

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thanks 480, glad to hear im at least on the safe side. i want to take it to the dyno since i dont know how to work the safc but im workin 11 hours,6days n no time to do anything, hell they wouldnt even let me take my vacation days, so i have to figure how to use th safc on my spare time(none by the way)......

now, i know someone on here has the same setup or somewhat close., how about sharing your safc info so i have something to go by, or atleast tell me if i tuned the safc like if i had a regular ECU, or whats differrent???


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