I fixed the labels on the VAG graphs
10-16-2001, 08:37 AM
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I fixed the labels on the VAG graphs
Was mistaken on who had the CDA. I have a "T" box as does AIRSTTRIKE & RoberTTo. Too bad we didn't get the time to do a round robin box swap (stock, GIAC, ABT). AIRSTTRIKE has the full Forge exhaust, he got more midrange torque but less hp than stock. Would have been nice to see what the two chips could have done to his configuration. RoberTTo's air flow & hp are way low, makes one think than Garret has scaled the voltage to the MAF sensor. This would explain why blueshirTT's reported torque & air flow are no better than my car without all the mods. Box swap tests will tell us if it is so.
10-16-2001, 08:54 AM
#2
3 questions...
1.) So my intake may even be reducing HP?!!!!
2.) If my HP is way low why can I still keep up w/blueshirTT through a high speed run?
3.) What does scaling the voltage to the MAF sensor mean.
John, thanks for all your effort on this one, you are a great asset us!
2.) If my HP is way low why can I still keep up w/blueshirTT through a high speed run?
3.) What does scaling the voltage to the MAF sensor mean.
John, thanks for all your effort on this one, you are a great asset us!
10-16-2001, 09:29 AM
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Re: 3 questions...
3) Voltage divider can be changed to increase the sensor's range. Stock the car was set to read up to 190 grams per second. I don't know how close this is to the sensor's limit. I can hook a voltmeter up to find out. I've seen 205 on my car.
2) Using the original scale factors on a rescaled sensor will give low numbers for air mass flow and therefore torque. Torque is mainly affected by air, fuel and ignition timing.
1) Not necessarily, we need to verify the scale factors. The road in Long Island was nice and flat. Using cruise control to hold steady power outputs at a number of speeds you log air and torque readings. If the sensor was not scaled then both stock & Garret boxes will give the same numbers. If not then difference can be used to rescale reading. If it turns out this is the case we could ask Uwe to alter his program to read a user defined scale file.
2) Using the original scale factors on a rescaled sensor will give low numbers for air mass flow and therefore torque. Torque is mainly affected by air, fuel and ignition timing.
1) Not necessarily, we need to verify the scale factors. The road in Long Island was nice and flat. Using cruise control to hold steady power outputs at a number of speeds you log air and torque readings. If the sensor was not scaled then both stock & Garret boxes will give the same numbers. If not then difference can be used to rescale reading. If it turns out this is the case we could ask Uwe to alter his program to read a user defined scale file.
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