<a href="http://homepages.nyu.edu/~jod204/charts_dataraw.xls">Raw data</a>

<a href="http://homepages.nyu.edu/~jod204/charts_data.xls">here are charts/data</a>

bottom line. i'm only getting about 143g/s MAX (datablock 002) and about 13.3ish psi boost (no more than 1900's

so...;where to go from here?

these were done at 55deg. 3rd gear...oh. and some were done with the 3/4 throttle teqnique- u can see my throttle position during the runs on the charts and some were done at WOT...no difference....

ARRRRGGGHHHHH

also there is a procedure in bentley to diagnose your maf while idling with vag-com.

iut looks like you might have a bad maf. check the airbox first though. then do the bentley procedure.

but i wouldn't assume that would affect it- if anything i would imagine seeing more air coming through

since requested is relatively equal to actual boost. if it was leak i'd see a big variance in requested boost vs. actual.

possibly maf

if indeed disconnecting MAF works out, i can assume it's either dirty maf? since a dirty maf will throw a dtc?

I just logged my airflow and only got 17.16lb/min ~130g/s

50* ambient, about 70-106 intake temp

this is also with a "Pocketlogger" on my palm logging general OBDII stuff. My friggen Vag cable hasn't come in yet. I don't know how accurate this thing is. My airbox pre-screen is clean though.

i mean, if we're both getting roughly the same readings then APR is bull****ting with pwoer gains (i mean i've read vag readings of giac chip with a 2100 -1.1bar from two seperate cars with same relative readings- and they're doing it no problem)......or thers something wrong with both our cars....did you measuire boost by any chance?

I am only doing this from a Pocket Logger on my Palm. Not VAG-com. Like I said before, I dont know how accurate this is compared to VAG. But my boost gauge hits 15-16psi no problem. The software for the 2001's may push more air than the 2000's.

is it possible that the 15-16psi reading from a boost guage would be higher? as far as i knwo the boost is measured in the intake, whereas for a guage it's measure in the vacuum lines....so that may be one reason, another reason- is it possibel the guages are slightly innaccurate?!? i'd hate to think the hardware of the care is inaccurate....regardless, apr sitll hasn't replied to my email which i'm somewhat disapointed about.=-/

1.) I agree they should push the same amt of air. But APR could have tried to push more through the next version of software. (just talking out of my butt for possibilities) My buddy with GIAC on his 97 maxed out his MAF at 186g/s
2.) Pressure in the system is pressure in the system. Whether in the intake lines or the manifold, its not going to be different. Pressure in a system doesn't work that way. BTW, the MAP is in the intercooler line
3.) gauge reads 0 psi when off, so its fine
4.) APR blows goats in re: to e-mail replys

claims over several years time. If you aren't making proper boost, I'd think it far more likely that you have an issue with your car.

I have a very similar set up to you. The only difference is I have the PES/EVO cone filter intake. I have very weird boost issues as well. I don't have a vag tool to measure boost yet. It is more feel. I now have a lot of pinging at WOT. I too, have no idea what to do. I have cleaned the filter and checked for leaks. Will try cleaning MAF and changing plugs this weekend, and will report back. Will be interested in hearing what you learn. I have a 99.5 a4 NDBW. This problem is frustrating though. I am thinking about taking my car in to have it sorted out. My TT never had these problems with mods.

which is where you measure boost pressure. If the gauge is going to be off it will be slightly off but it would do that when it is off and in vacuum also.

get the VAG...

Will it tell me which cylinder(s) are pinging, and does it analyze fuel delivery...like possibly if I have an injector that is failing? I have replaced one about 6 months ago. Goodtimes.

i'm still new to vagworld., but i did see something with a missfire detection for each cylinder-

best thing to do it post up your Q in the vag forums...title ATTN andy@rosstech! or something hehe..

it does all sort of crazy shiznit. Take a look at the link. You can also search around for what each block logs. Its around here somewhere<ul><li><a href="http://www.bentleypublishers.com/tech/audi/audi.dtc.table.htm">http://www.bentleypublishers.com/tech/audi/audi.dtc.table.htm</a</li></ul>

That is very cool.

since i can only log three things and i wanted to check out whether the 3/4throttle did anything i used

115 (boost)
060 (throttle position)
002 (cfm)

problem with logging three things- sampling rate is slower...(as explained by vag-com).

what to do what to do....
i'm gonna start off by replacing the cone with the stock intake...see if that changes anything...if not, the cone goes back on- i highly doubt it is the cone since the dudes who i knwo runnign 1.1-1.2bar on their giac chips run cones too and have had no problems at all....i know there are differences in giac an apr but i always thought it was differences in power delivery vs. peak power...

<center><img src="http://pictureposter.audiworld.com/143/vagplots-1.jpg"></center><p>here is an example of some logs. do 3rd gear WOT runs of timing/boost/maf.

you need to know if the car is pulling timing.

also do the bentley procedure for checking the maf.

ok. so logs 002, 115, and what block is timing?!

4B0 906 018 M

ECU cover?
The fact is there is nothing systemic in the APR or GIAC chips that precludes either from delivering full boost. If you are seeing requested boost at a level less than expected your car is dialing back requested boost.

and essentially it's my car telling me to reduce boost...therfore something wrong with my car.... hmmmmmm...

The requested boost on the 1.8t is load based. If the calculated load is low the requested boost will be low. many things can contribute to a low calculated load.... slipping clutch, MAF headed south, etc.

The APR 4B0 906 018 M software hasn't the octane specific support of the 4B0 906 018 CH but the peak boost ought to be the same for both chips. My WAG is it is NOT a chip issue but an issue with your car.

and if it is my car, at least i can stop blaming the programming and start looking at items in my car.

again though- to rule out a few things- it won't be the bpv - if that were the case the requested vs. actual would see a larger variance. It's not a leak cause again requested vs. actual= different...

most likely it'll be the maf?! or the cone intake??