Boost Graph Stock 2002 S4
#11
12-13-2009 | 08:37 PM
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Joined: Aug 2009
Posts: 16
Excellent sir, yes thank you. Although I could have learned alot more seeing the raw data file. How many times did you log to conclude your FATS are 6.7? OCT? TEMP? SPARE? Im new to all this myself. Now trying to tweak with uni/lemmi. The reason I said block 023 was because I wanted to see BOTH your rpm and CFs with a time stamp(same run). I can only use free-ware vagcom(cheap ***) and thats the block Im using to determine issues Im having. In short my FATS are ranging from 5.1-6.2. After MANY logs I noticed a correlation in my FATS : CFs. When my times where in the low 5s my CFs were 4s, and in the 6s CFs 9s. Now I dont have a CEL but my o2s are throwing codes off/on. I hope this is why my FATS are so slow.
Having said that, I see your CFS are 0s. Add some timing and fuel to get them up at least to 4s. Then watch what happens to your FATS.
Having said that, I see your CFS are 0s. Add some timing and fuel to get them up at least to 4s. Then watch what happens to your FATS.
Raw files are attached. I really only took Run2 to calculate the FATS.
91 OCT, 38F, no Spare, no mods
#12
12-14-2009 | 12:14 AM
91 Really!? Looking at the logs I noticed your MAF seems low. I also recommend logging ONLY one block, your samples are too far apart. Even then your lucky to get 3 samples a sec. This is why I wanted just block 023. Still it helps to see in contrast to my weak sauce.
#13
12-14-2009 | 07:07 PM
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Junior Member
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Posts: 16
91 Really!? Looking at the logs I noticed your MAF seems low. I also recommend logging ONLY one block, your samples are too far apart. Even then your lucky to get 3 samples a sec. This is why I wanted just block 023. Still it helps to see in contrast to my weak sauce.
91 Really!? Looking at the logs I noticed your MAF seems low. I also recommend logging ONLY one block, your samples are too far apart. Even then your lucky to get 3 samples a sec. This is why I wanted just block 023. Still it helps to see in contrast to my weak sauce.
I'll try to sample one a time for another set of readings. I want to get a very good baseline going so I know how each mod I do affects all the important metrics.
I looked into what my MAF should be. According to ross-tech:
http://www.ross-tech.com/vag-com/cars/fuel-trim.html
"Here's a good sanity check for the status of your MAF. Do a full-throttle run all the way to redline in a single gear (second works fine). Group 002 usually shows air mass in g/s. Your peak airflow should be roughly 0.80 times your horsepower. So, if you have a stock 150 hp 1.8T, expect around 120 g/s. If you see significantly less than that, you MAF may be on the way out. This still works if you are chipped, but "race" programs may make more power through timing, rather than airflow. Therefore, take all readings with a grain of salt."
So I took the reading at 250hp * .8 = 200g/s. The peak airflow I read from VAG was 212.83g/s so it looks like I may be ok on that number?
#14
12-14-2009 | 08:30 PM
I'll try to sample one a time for another set of readings. I want to get a very good baseline going so I know how each mod I do affects all the important metrics.
I looked into what my MAF should be. According to ross-tech:
http://www.ross-tech.com/vag-com/cars/fuel-trim.html
"Here's a good sanity check for the status of your MAF. Do a full-throttle run all the way to redline in a single gear (second works fine). Group 002 usually shows air mass in g/s. Your peak airflow should be roughly 0.80 times your horsepower. So, if you have a stock 150 hp 1.8T, expect around 120 g/s. If you see significantly less than that, you MAF may be on the way out. This still works if you are chipped, but "race" programs may make more power through timing, rather than airflow. Therefore, take all readings with a grain of salt."
So I took the reading at 250hp * .8 = 200g/s. The peak airflow I read from VAG was 212.83g/s so it looks like I may be ok on that number?
I looked into what my MAF should be. According to ross-tech:
http://www.ross-tech.com/vag-com/cars/fuel-trim.html
"Here's a good sanity check for the status of your MAF. Do a full-throttle run all the way to redline in a single gear (second works fine). Group 002 usually shows air mass in g/s. Your peak airflow should be roughly 0.80 times your horsepower. So, if you have a stock 150 hp 1.8T, expect around 120 g/s. If you see significantly less than that, you MAF may be on the way out. This still works if you are chipped, but "race" programs may make more power through timing, rather than airflow. Therefore, take all readings with a grain of salt."
So I took the reading at 250hp * .8 = 200g/s. The peak airflow I read from VAG was 212.83g/s so it looks like I may be ok on that number?
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