Magic chip??

[blkb6a4]

Hey guys, so I bought my a4 a few months ago(LOVING it soo far!) then about a month ago i put a boost gauge in i found out it was chiped, yay for me!(~18-19PSI in 3rd,4th and 5th) then two days ago I put the atp 3" test pipe and now my boost has jumped to ~21-23PSI in the top three gears now 18 to 19 seemed normal for a chipped B5 but 21-23 seems higher than what I have seen b4. Any idea if something is wrong or do I just have some crazy magic super boost chip?

also sometimes when its really hot out 85+ and I'm not already going fast(aka freeway speeds) my car wont make boost at all till 4k ???, sometimes not at all in 1st and not till 5k in 2nd:( and I think it sounds like the wastegate is just open, I can hear the turbo spool and air rushing but then I also hear a different air rush...like the wastegates stuck open or being held open for some reason. Any ideas or thoughts on this problem?

thanks for any help or advice!

[Matt@JHM]

"I just have some crazy magic super boost chip" quote of the month

Unless you have a k04, you shouldn't be boosting that much.

Do you have a way to check for fault codes? Look for positive deviation.

[blkb6a4]

yea thats the first place my head went to(K04) don't they look the same from the outside? whats the best way to tell if I did have a K04? I tried getting ahold of the first owner, the one who did the chip (2nd owner didn't even tell me about the chip till i called and asked after I put the the boost gauge in) and I never heard anything back.

P.S. thanks for the nomination for quote of the month haha

[Matt@JHM]

yea thats the first place my head went to(K04) don't they look the same from the outside? whats the best way to tell if I did have a K04? I tried getting ahold of the first owner, the one who did the chip (2nd owner didn't even tell me about the chip till i called and asked after I put the the boost gauge in) and I never heard anything back.

P.S. thanks for the nomination for quote of the month haha

Np Read my edit. Overboosting can be caused by a few things such as a fault n75 valve and in more extreme cases a torn waste-gate line. So check for faults.

[blkb6a4]

I don't have a way to check for faults, I know autozone will run a scan for free would they be able to check for me?

[Matt@JHM]

I don't have a way to check for faults, I know autozone will run a scan for free would they be able to check for me?

They should, they will give you a code. Once you get that code do some searching and figure it out. Or post it here. Good Luck.

[Stampy]

Maybe you should look at your ecu and see if it tells you what kind of chip you have. Sometimes they put a sticker on it or something along those lines.

[blkb6a4]

ok so by some random chance i posted this same post on the MNaudi board and the first owner of the car read it and contacted me and said I have an APR chip. so thats one problem down haha

so i guess it still could be the waste gate stuck open due to a bad n75 or something but at least i know that when the boost is "acting right" its not something bad

any other ideas or help would be nice guys thanks for the advice so far

[mike-2ptzero]

There is nothing wrong with your car, those boost #'s are normal for a APR and GIAC chip on a 2001.

My custom GIAC chip ran 26psi so it isn't like these little K03's can boost that high.



The other issue of the boost taking long to come on when it is hot outside could just be your bpv sticking causing it to leak and stay open longer then it should. Have you serviced your BPV lately?

[blkb6a4]

well coming from such a respected member ill buy that and thank you for that!

so my exsess boost problem is fine, but what about my lack of boost problem???

[mike-2ptzero]

BPV or could even be the small valve under the intake valve that vac line from the BPV connects too. That valve can control when the bpv opens and if it doesn't allow pressure thru quick enough the bpv stays open and causes boost to come on much slower.

[4Rings4flow]

are you running a manual boost controller with your magic chip?

[Stampy]

Those are not right numbers for APR even in Heat. Those are more GIAC X chip numbers. My APR would spike to maybe 17-18 in all weather conditions.

[4Rings4flow]

i have apr, and mine will boost that high, but i've also got a lot of other extras...and run a MBC.

[blkb6a4]

No I'm not running a MBC and as far as I can see the N75 is still stock but who knows, I'm still waiting to hear back from the previous owner so maybe he changed it.

So what everyone is saying is that a great place to start is check for leaks with everything involving the wastegate???

[Seerlah]

I don't have an MBC or an APR chip, but have a flash from a different tuner. I boost ~21-22psi with a HFC and Aftermarket Cat Back Exhaust. Forge 007 dv with yellow spring.

[Naudilos]

Those number look fine for a 2001. But I dont have apr, I have GIAC-X with a test pipe and full exhaust and upgraded diverter valve, and could easily see 21-22 psi in the top gears. So it is possible to be running that on a '01.

[speedydragon]

I'm spiking 17-18psi on my apr too :|

[turbo kraut]

you are probably running the race valve.... and my apr with what i have gets very close to those #'s....... main difference is size of our exhaust

also i fried my ecu and had to drive around for a few days on my old stock ecu and i was boosting to about 15(peak) settleing to about 8-10...... your peak is 21-23, but i would take it you settle about 16-19? that seems fine

[a4rings]

so are the chipped 2001 a4's that much faster than the previous model years? also why are you guys running boost controllers with only a chip? wouldnt uping the boost without changing the tune cause the car to run lean?

[Stampy]

I'm surprised that people are saying these spikes are normal with APR. For the 01's I thought it was pretty common knowledge that the X chip usually posted spikes like these. I have always considered the APR weak sauce compared to the X chip cars I have driven.

[diablooffire03]

If you ask me even at 18psi+ I doubt the gains are so minimal if even noticable other than seeing more psi on your boost gauges... Cant see this hairdryer of a turbo making any power at those boost levels.

[mike-2ptzero]

If you ask me even at 18psi+ I doubt the gains are so minimal if even noticable other than seeing more psi on your boost gauges... Cant see this hairdryer of a turbo making any power at those boost levels.

You must be very new, believe me it does. My custom K03 street chip for CA 91 octane ran 26psi and I had no problems keeping up with stock S4's on the street.


BTW the 2000-2001 came with a more aggressive K03 then the 97-99.5, they also came with larger injectors.

[m5racer]

BTW the 2000-2001 came with a more aggressive K03 then the 97-99.5, they also came with larger injectors.

Nice fun fact i did not know

diablooffire03: you must be new, these cars boost stock 8-10 psi (my 01, cant remember beucase i havent run stock file in over a year) so boosting at 18psi will make quite a big diffrence reguardless if the turbo is big or small, more boost = more power always.

My apr runs 16-18psi all day, they are only a 1.0bar file so i dont think APR chips run 21 psi, my giac i had did though so maby you have a GIAC

[4Rings4flow]

my baby K03s poops on stock S4s for fun. will hang with the built S4 that is parked next to it.

I run a MBC because I can/want to...plus it will go BAT at some point; I've done everything except that, as of now.


you don't need to run anything more than the stock F valve (N75), the "race" H valve, and J valve are no good for APR's tune. so, if you do have something other than stock, replace it with stock.

[diablooffire03]

well my reasoning, I was compairing to say an older stock 4g63. Hell the t25 could boost to 25psi sure, but all it did was blow hot air into the motor. Little turboes are very insuficient in that way. To me the t25 was bigger than k03 too. Is it even possible for the turbo to push 220-240whp?

[mike-2ptzero]

Nice fun fact i did not know

diablooffire03: you must be new, these cars boost stock 8-10 psi (my 01, cant remember beucase i havent run stock file in over a year) so boosting at 18psi will make quite a big diffrence reguardless if the turbo is big or small, more boost = more power always.

My apr runs 16-18psi all day, they are only a 1.0bar file so i dont think APR chips run 21 psi, my giac i had did though so maby you have a GIAC

Most tuners haven't offered 1 bar chips since the ndbw only days. Nearly all of them after 2000 pushed 1.2-1.45 bar. Even Nospeed offered 2000+ chips pushing 1.3 bar, but it was mainly just a 1.3 spike.

well my reasoning, I was compairing to say an older stock 4g63. Hell the t25 could boost to 25psi sure, but all it did was blow hot air into the motor. Little turboes are very insuficient in that way. To me the t25 was bigger than k03 too. Is it even possible for the turbo to push 220-240whp?

Yes the T25 is much larger then the K03, the T25 on a A4 will produce 220-250whp depending on boost and what fuel it is tuned on. The K03 will NOT make much more then 200whp on a quattro even pushing over 20psi and tuned on 104+ octane.

BTW I owned a stock turbo 95 GST FWD while I had my A4. My custom tuned K03 was just as quick as my eclipse if not slightly quicker.

[nomoore]

well my reasoning, I was compairing to say an older stock 4g63. Hell the t25 could boost to 25psi sure, but all it did was blow hot air into the motor. Little turboes are very insuficient in that way. To me the t25 was bigger than k03 too. Is it even possible for the turbo to push 220-240whp?

Well a 4G63 is a slightly larger displacement (2.0L) so it requires a higher volume of air to produce 23psi. I don't doubt though that 23psi on our 1.8L from a K03 is pushing the limits of efficiency/hot-air-blowing.

[m5racer]

[QUOTE=mike-2ptzero;2695541]Most tuners haven't offered 1 bar chips since the ndbw only days. Nearly all of them after 2000 pushed 1.2-1.45 bar. Even Nospeed offered 2000+ chips pushing 1.3 bar, but it was mainly just a 1.3 spike.


so why am i boosting 1.0bar? did apr give me an old chip? i got it done at the begining of last summer. Also i heard you can go to the apr dealer and they do free updates, true?

[mike-2ptzero]

[QUOTE=m5racer;2695651]

Most tuners haven't offered 1 bar chips since the ndbw only days. Nearly all of them after 2000 pushed 1.2-1.45 bar. Even Nospeed offered 2000+ chips pushing 1.3 bar, but it was mainly just a 1.3 spike.


so why am i boosting 1.0bar? did apr give me an old chip? i got it done at the begining of last summer. Also i heard you can go to the apr dealer and they do free updates, true?

Your only hitting a max boost of 14.5psi? Are you running a TP or stock cat?

Yes updates should be free, you can ask your local dealer or call APR to make sure.

[Stampy]

so why am i boosting 1.0bar? did apr give me an old chip? i got it done at the begining of last summer. Also i heard you can go to the apr dealer and they do free updates, true?

Because the APR is only a 1.0 bar chip. It is running normal. This is why everyone with an 01 is recommended GIAC/Dahlback, cause they are a more aggressive tune.

[4Rings4flow]

did you mess with the TIP at all? could be that the turbo inlet connection has slipped off a bit.

[diablooffire03]

my baby K03s poops on stock S4s for fun. will hang with the built S4 that is parked next to it.

I run a MBC because I can/want to...plus it will go BAT at some point; I've done everything except that, as of now.


you don't need to run anything more than the stock F valve (N75), the "race" H valve, and J valve are no good for APR's tune. so, if you do have something other than stock, replace it with stock.

So your saying a measly 200whp, maybe on real good day 210whp, your car will hang with the built s4 next to the stock s4 that you can pull on? You need to race against someone who knows how to drive to hype up somthing like that. Trust me these cars are pretty slow no matter what kinda crazy psi your running on a k03 with or without the reconfigured 00-01 years that put out a few more horspower. There good for making turbo noise and diverter sounds, but until a real turbo is installed thats all there good for.

To me the car is a sweet AWD cruiser and the first turboed car ive ever driven that can hit full boost by just revving the car at idle, haha.

[mike-2ptzero]

So your saying a measly 200whp, maybe on real good day 210whp, your car will hang with the built s4 next to the stock s4 that you can pull on? You need to race against someone who knows how to drive to hype up somthing like that. Trust me these cars are pretty slow no matter what kinda crazy psi your running on a k03 with or without the reconfigured 00-01 years that put out a few more horspower. There good for making turbo noise and diverter sounds, but until a real turbo is installed thats all there good for.

To me the car is a sweet AWD cruiser and the first turboed car ive ever driven that can hit full boost by just revving the car at idle, haha.

Even with the most power out of a K03s on a quattro A4 it isn't going to run anywhere near a modded S4, even with a bad driver a chipped stage 1 S4 is going to run low 14's and that is the quickest an A4 has ever gone and I know because I still hold the record of 14.29 at 97 miles and did that over 7 years ago. Making 200awhp on a A4 with a K03 isn't easy without a tune for very high octane or using nitrous, most people are lucky if they can hit 200whp with a K04 and most of the GT28R setups just make a little more then that.

[AEB A4]

i want to hit atleast 200 with my k04....thanks for ruining my pathetic little dream . I just want to keep up with my friends mostly stock (except for exhaust and haldex) R32......

[turbo kraut]

So your saying a measly 200whp, maybe on real good day 210whp, your car will hang with the built s4 next to the stock s4 that you can pull on? You need to race against someone who knows how to drive to hype up somthing like that. Trust me these cars are pretty slow no matter what kinda crazy psi your running on a k03 with or without the reconfigured 00-01 years that put out a few more horspower. There good for making turbo noise and diverter sounds, but until a real turbo is installed thats all there good for.

To me the car is a sweet AWD cruiser and the first turboed car ive ever driven that can hit full boost by just revving the car at idle, haha.

Even with the most power out of a K03s on a quattro A4 it isn't going to run anywhere near a modded S4, even with a bad driver a chipped stage 1 S4 is going to run low 14's and that is the quickest an A4 has ever gone and I know because I still hold the record of 14.29 at 97 miles and did that over 7 years ago. Making 200awhp on a A4 with a K03 isn't easy without a tune for very high octane or using nitrous, most people are lucky if they can hit 200whp with a K04 and most of the GT28R setups just make a little more then that.

guys he was joking.... i hope, he said he can beat a stock one and look better parked next to a moded one.........

what i don't get is why no one has corrected him about the mbc?

[4Rings4flow]

the A4 is FWD, so it's a good bit lighter. i've owned/driven a good amount of really quick cars and can honestly say the A4 will hang with the S4. it will definitely out run a R32, ask anyone of them running around here if they can keep up...

maybe it's on steriods...i'm not sure, all i know is that it keeps pace with a nicely modded speed3 everyday on the way to work. i need to take it up to absolute and see some numbers...but i just can't bring myself to give them $$.

correct me on the MBC?

[4Rings4flow]

So your saying a measly 200whp, maybe on real good day 210whp, your car will hang with the built s4 next to the stock s4 that you can pull on? You need to race against someone who knows how to drive to hype up somthing like that. Trust me these cars are pretty slow no matter what kinda crazy psi your running on a k03 with or without the reconfigured 00-01 years that put out a few more horspower. There good for making turbo noise and diverter sounds, but until a real turbo is installed thats all there good for.

if you think they are that slow, tis you that needs to learn to drive...i'm speaking from driving both, on a daily basis. you are confusing me though. the silver car is a 2001 FWD A4 with plenty of bells and whistles. the black car is a 2000 S4 with all the same components, except the clutchmasters kit and lwfw.

To me the car is a sweet AWD cruiser and the first turboed car ive ever driven that can hit full boost by just revving the car at idle, haha.

do you puff rocks or what?

[diablooffire03]

^^On which part hitting full boost by revving it??? Well it comes damn near close to hitting 15psi just from a rev. Now that is just rediculous. And your S4 must have some issues if your A4 is hangs with it.

[Mawhitey]

Wicked, i wish you had some numbers or track vids as mine gets left behind by R32's and Vr6's and mine is a k04'd FWD A4. 16 sec ish qtr with half a tank of fuel, fully soundproofed etc, i am happy with the performence of mine. No way i could "do" an S4 tho