#1408, "RE: 440cc injectors (43psi) and SAFC" In response to Reply # 0
DIGITAL SUPER AFC Piggyback Fuel Computer
Modifies air-flow meter signal (pressure signal in some vehicles) to optimize fuel-air ratio; Vacuum Fluorescent Display (VFD).
The second-generation S-AFC is a fuel computer that adjusts fuel/air ratio by modifying the air-flow meter/MAP sensor signal. The S-AFC features a user-definable, eight-point, adjustable fuel curve that can be set in 500 RPM increments. The range of fuel adjustment is +/- 50% at each of the user-defined setting points. On hot-wire vehicles, the Deceleration Air Flow Correction function is capable of curing the erratic idle and stall problems associated with open-atmosphere blow-off valves on hot-wire air-flow meter systems. The S-AFC is capable of monitoring and replaying the following data channels in Numerical, Analog Meter and Graph displays: Intake Manifold Vacuum/Boost Pressure, Air Flow Capacity, Intake Manifold Pressure, Karmann Frequency, Engine RPM, Throttle Position, and Air Flow Correction %.
Messing with an S-AFC is not for the timid, IMHO, but you must know a little about how to use your gauges and meters. You will need at least a Voltmeter to read your O2 sensor and EGT gauge to measure how hot the gases are, shooting out of one of your exhaust runners(the hottest is number 1 I believe). HRC's site has a little info about how to tune and so does RRE.
Skrilla '97 Base Talon NA "Technology is the Only Substitute for Displacment" "Peace and Turbo Grease"
*Skrilla "Honest officer, I thought you were trying to race me" Talon: 1st 2.4L '97 Prelude '04 350Z
Originally posted by YourInMyMirror95GS dick teaser's should be rounded up and shot in the forehead
Originally posted by etx Good luck man! Project 'STFU Brian your talon is dead meat' should be on it's feet soon!
Originally posted by Dark0ne Thanks. Now excuse me while i fuck your sister.
#1413, "SaberKhan got it" In response to Reply # 5
Driver's side Cylinder is number four. If you are looking at the front of your car it is the cylinder/runner closest to both the battery and PCM. I see it on my hotshot header and it is number four. The driver's cylinder. It is also the cylinder last(obviously) on the rail
Skrilla '97 Base Talon NA "Technology is the Only Substitute for Displacment" "Peace and Turbo Grease"
*Skrilla "Honest officer, I thought you were trying to race me" Talon: 1st 2.4L '97 Prelude '04 350Z
Originally posted by YourInMyMirror95GS dick teaser's should be rounded up and shot in the forehead
Originally posted by etx Good luck man! Project 'STFU Brian your talon is dead meat' should be on it's feet soon!
Originally posted by Dark0ne Thanks. Now excuse me while i fuck your sister.
#1415, "RE: SaberKhan got it" In response to Reply # 7
I've heard a few different explanations. One being that its so far on the fuel rail that it doesnt get enough fuel. Etc etc. Its just a good safe idea to monitor your hottest cylinder. If that one is in check, then you know the others are fine.
91 awd: 60-1, 880's, E-Prom, etc. 93 awd: JDM 6 bolt, K&N, full exhaust, Wally 255, otherwise stock.
R.I.P. the original "Factory Freak" 15.5's with short ram and catback only 1996 RS 5-speed
#1417, "RE: SaberKhan got it" In response to Reply # 9
Then you would be getting the average temperature of all four cylinders. We know for a fact that #4 runs the hottest, so why not get the reading from the hottest cylinder? That cylinder could run dangerously hot while the other three are within acceptable ranges. It's just safer that way.
-DarkOne I'm so bad, i should be in detention.
______________________________ If a sentence found online has 35% misspellings or greater and includes at least two racially charged expletives, chances are it is a YouTube comment.
'95 Eclipse TurboGS (garage deco) '95 TSi AWD (restoring a survivor) '97 Talon ESi-T (poor impulse control) '99 Eclipse RS-T (daily beater) '13 Evo X (mostly stock) '17 Sienna (Middle Aged Dad Mobile)
#1419, "Averaged if anything" In response to Reply # 11
1st off heat is not exactly commulative. If it were commulative then taking 12* of heat and 150* would equal 162* when that's not the case at all, especially since 12* is actually cold air, the same applies for all "heat". 600* plus 600* doesn't equal 1200* but just helps to sustain the heat, sure it may be a little higher but certainly not twice the heat.
-to answer an earlier question: who would really want an average where all the heat is combined. Like Darkone said while 1 cylinder is lean the other could be rich, so I would you take the worst of the pick #4. Ideally(if you had $$) you would get 4 EGT's for each exhaust runner(monitor each cylinder).
Skrilla '97 Base Talon NA "Technology is the Only Substitute for Displacment" "Peace and Turbo Grease"
*Skrilla "Honest officer, I thought you were trying to race me" Talon: 1st 2.4L '97 Prelude '04 350Z
Originally posted by YourInMyMirror95GS dick teaser's should be rounded up and shot in the forehead
Originally posted by etx Good luck man! Project 'STFU Brian your talon is dead meat' should be on it's feet soon!
Originally posted by Dark0ne Thanks. Now excuse me while i fuck your sister.
#1420, "RE: Averaged if anything" In response to Reply # 12
Heat isn't cumlative at all. Measuring temp at runner #4 vs at the collector is like measuring the temp at my house and the temp at your house. Your not measuring the same place. No such thing as 150C+150C. If you take a 30deg F block of ice and put it next to another 30deg F they dont cumulate. You still have 30deg F. The four individual runners cannot heat the collector any hotter than the hottest runner (turn your stove to 400deg you cant heat the chicken to 420deg). Putting the probe at the collector would allow the exhaust to cool by the time it reached there. Not only would you not know which cyl is the hottest you couldn't measure exh temp as accurately as you should. The closer to the exhaust port the better.
Search
Printer-friendly copy
0 Users in Chat
