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Blockin Traffik
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140 Posts
Discussion Starter · #1 ·
well alot of us need tuning, and people sure do charge an arm and a leg to tune a car, well Chris im pretty sure some of you know him bought a se-r with a gti-r the same black one that was at full throttle for 2 years and they still didnt get it to run right, i brought my lap top to the shop with a program i downloaded, (i cant even remember where i got it from, i downloaded it a few months back and im now messing around with it LOL )and we started messing around with it seeing what were the capabilities, after about 4 runs i got the hang of it and started playing around with the afc and adjusting the fuel at certain rpms....and well when its logging in the computer its this big graph with 4 lines, one for air fuel ratio, 1 for throttle position, 1 for rpm, and the other for mas aiflow voltage. heres how it looks in plain numbers:


Log Date: Friday April 09, 2004 - 13:42:15
TIME, AFR, RPM, Voltage, Throttle Position
7.741, 10.64, 6230, 1.31, 3.84
7.841, 10.55, 5703, 1.31, 3.73
7.941, 10.52, 5882, 1.31, 3.77
8.041, 10.45, 5509, 1.31, 3.78
8.141, 10.51, 5905, 1.31, 3.75
8.242, 10.52, 6282, 1.31, 3.74
8.342, 10.54, 6295, 1.31, 3.61
8.442, 10.53, 6315, 1.31, 3.36
8.542, 10.87, 6362, 1.31, 2.50
8.642, 10.69, 6172, 1.30, 0.30
8.742, 11.66, 5698, 1.33, 0.31
8.842, 11.55, 5905, 1.31, 3.90
8.943, 11.75, 3680, 1.31, 3.85
9.043, 11.10, 5272, 1.31, 3.88
9.143, 10.60, 4676, 1.31, 3.87
9.243, 9.88, 4654, 1.31, 3.90
9.343, 10.12, 4750, 1.31, 3.91
9.443, 10.31, 4773, 1.31, 3.82
9.543, 10.40, 4788, 1.31, 3.90
9.644, 10.50, 4815, 1.31, 3.89
9.744, 10.48, 4893, 1.32, 3.89
9.844, 10.50, 4922, 1.31, 3.93
9.944, 10.38, 4991, 1.31, 3.88
10.044, 10.45, 4995, 1.31, 3.90

thats just a little sample of a 15 second run, i dont know how many of you are actually able to understand it but in the air fuel ratio column 14 is stoich anythnig under 14 is rich, over 14 is lean so with this chart we were able to see where we need to lean out the car or richen it up a little at certain rpms. we left the car running a little rich just to be safe, when we take it to the track we probably will lean it out a little more. also in the throttle position column u can see where the driver (Nigel) changed gears at 8.542 seconds into the run, that was a second - third shift.
i just thought it would be nice to pass this info onto you guys, oh and it took me about 20 minutes to hook up the system to the car. next im gonna see if i can get a mph signal and try it again, tomorrow i will be doing the same thing with a 95 honda accord that we turbocharged ill post the results tomm when i get home
 

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Blockin Traffik
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140 Posts
Discussion Starter · #3 ·
nite-stalker said:
can you tell what hardware/software u used along with the laptop?
yo it was just something i came across one late night while surfing the internet and downloaded it, this was back in september, and im now starting to figure it out, im not at home right now, but when i get home ill check out the name of the program and ill post it
 
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