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  #1  
Old 07-20-2009, 12:35 PM
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Default k03 turbo

what is the max boost that i can get out of a k03 turbo?
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  #2  
Old 07-21-2009, 08:11 PM
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around 18 without killing all internals.
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  #3  
Old 07-22-2009, 08:16 AM
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im running 19 now. and the turbo sounds like it just about had it.
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  #4  
Old 07-27-2009, 10:13 AM
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Default 18psi seems about right...

I am getting max sustained of 15 psi and spikes of 16-17psi, as read from a VDO mechanical boost gauge. I plumbed my gauge right off the manifold, after the throttle valve. I have the stock k03(s) turbo with an O.CT chip/program. Not sure if you are asking about a K03s or K03? Don't know how much pressure drop there is across the stock SMIC or how high that program is trying to push the boost in the first place. So I might be spiking around 18-19psi at the compressor outlet. The car as been running this setup for over 40k miles. Hope that helps.
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  #5  
Old 07-30-2009, 04:36 PM
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All of you are wrong lol

I ran 26psi on my stock K03 that came with my car, that was on a custom GIAC chip for CA 91 octane.
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  #6  
Old 07-30-2009, 05:22 PM
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Quote:
Originally Posted by Mike-2ptzero View Post
All of you are wrong lol

I ran 26psi on my stock K03 that came with my car, that was on a custom GIAC chip for CA 91 octane.
what kind of power were you making? how long did the turbo last?

and why would you custom tune a K03? lol
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  #7  
Old 07-30-2009, 07:09 PM
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Quote:
Originally Posted by AutoUnionFan View Post
what kind of power were you making? how long did the turbo last?

and why would you custom tune a K03? lol
Why a custom tune? Because it was free(sponsored) and because my custom race tune pushed out 250chp with a K03 and ran 14.29 at 97 mph which still holds the A4 1.8t K03 record since 2001. lol

You can find it on this very old 1/4 mile B5 A4 list. http://timeslips.bootnetworks.com/
Here is my actual K03 time slip from back in 2001.
Click the image to open in full size.


The funny part is that my K03 on a earlier custom file I was able to put down as much tq on a dyno as a APR Stage 3 on a race tune put down right after I got off the dyno. That car was even brought to the event by APR since it was owned by an employee and they were using it as R&D for tuning.


Actually I pushed that k03 hard for over a year, even took it to the drag strip every single weekend and some times even more then 1 day at the track for 12 months before I removed it for a GT28r setup. I ended up selling that turbo a few years ago to someone I knew and he still has it on his A4.
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  #8  
Old 07-31-2009, 11:27 AM
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damn Mike, you are a legend

did that custom tune build boost slower than a generic GIAC file that you buy online?

I dont understand how you didnt destroy that poor little turbo
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  #9  
Old 07-31-2009, 12:45 PM
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Quote:
Originally Posted by AutoUnionFan View Post
damn Mike, you are a legend

did that custom tune build boost slower than a generic GIAC file that you buy online?

I dont understand how you didnt destroy that poor little turbo
Well spool up is all based on tuning, but you really cant get a k03 to spool up any quicker then it already does without increasing displacement. A race tune will get it to spool up a little quicker since the motor makes more power on its own because of the added adv timing and higher octane.


My custom tune was tweaked to allow the throttle body to open much quicker as I hit the pedal.

The custom 26psi street tune I was running ended up being used to produce the J31 K04 file for the 2000 which runs around 28psi but works best when ran at 25psi.
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Old 03-26-2011, 05:13 AM
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The custom 26psi street tune I was running ended up being used to produce the J31 K04 file for the 2000 which runs around 28psi but works best when ran at 25psi.[/QUOTE]


Mike, so I got a 2001 audi a4 1.8t AWM block with AEB HEAD big port n polish with precision 5758 .63a/r turbo, greedy BOV, godspeed headers, 3" cat back exhaust, 2 1/2 piping kit & intercooler, water n methanol injection(comes on at 9psi), adjustable timing gear, and everything else is stock. how much boost can I run safely with out blowing my motor? And what tune would you recommend? How much timing can/should I advance it?
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  #11  
Old 03-26-2011, 10:47 AM
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Not much boost at all with that size turbo, you really need to upgrade the rods. As for tune, I am not sure who has the best tune for the 2001 for that size turbo.
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  #12  
Old 01-26-2012, 01:49 AM
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Default ko3s 1.8t

running 26 psi on a ko3? Wow,i have agiac x plus tune ,dv,cold air ,exhaust,
n75 j,running 18 psi ,drop to 15.I have read about other guys running 27 lbs on a ko3 ,wish I could but might blow the turbo.
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  #13  
Old 01-26-2012, 11:41 AM
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Your X should hit 18psi in 1st/2nd gear and about 21psi in 3rd-5th.

I ran 20-26psi for a good amount of time and even sold the turbo years after I took the K03 out of my car. Have to understand my car was tuned for those boost levels, I didn't just raise the boost on a standard chip.
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  #14  
Old 02-01-2012, 03:18 AM
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Default boost ko3

I remember about a year ago reading your info on your car.It came up when I googled something else,regarding boost.your info regarding boosting 26 psi on a ko3 got me so excited....My ignorant self,started planning a strategy to find similar power on my ko3s new beetle.Something I just remembered to ask you.Your car was not a turbo diesel was it?I started reading any and all DIY's I could find.I must have spent 6 hours per night for a year ,absorbing info,and trying to put my own twist on those mods.My beetle has the ko3s turbo and the larger injectors and wrist pins.The awv motor was a detuned hardware same as a 180hp awp motor.I was wondering why you could make 26 psi
while many others were making 15 ,or 18 or 12 or 8 psi.I installed a boost gauge to find out I wa sonly boosting 7 psi then it would drop right down to 4 .That pissed me off !!!So,I went on a mission,a mission I am still on .Turns out ,I love this little car.,and I love tinkering.I made a custom cold air intake,which greatly reduced my operating temps.Added a hi flow exhaust,Replaced or cleaned all the sensors ,reclamped most the hoses.Put in an mbc and gauge and diode .Still was only making 10 psi,but the boost spooled quick and held fast ,felt better.I was using the wrong diode .I needed a 3.,9 zener but put in a 4.3 .I checked out tunes and opted for apr.It made pretty good power but service was horrible and the tech level was low with the guys I was dealing with.I switched to giac,because I heard their tune was more agressive,got it back but was still only boosting 15 psi and throwing a cel.Put in new plugs and coils still a cel.I finally decided to make a boost leak testor and soon found a major leak,hose going into the intake mani had a 2 in ch long slice in it and was blown out.5 other leaks found and fixed and now pulling 18 psi.I have not done a 4th or 5th gear hard pull yet but have never seen more than 18 psi so I thought that might be it.I put a diode switch in
and will put a mbc back in ,to try to get better spool up than a leaky feeling n75j valve.I also read up on a quicker way to spool up.,by lengthening the wastegate hose,making it about 8 feet long .,and a small reservoir tank connected with a t, to the hose.This way it takes more time for pressure to reach the wastegate so spool is almost as good as like going unwastegated .
This mod is legit and dyno revealed quicker spool time by more than 50%
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  #15  
Old 02-01-2012, 10:36 AM
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No it wasn't a TDI, just your standard 2000 A4 1.8t 20v with the ATW 058 engine. I was able to make 26psi because that is what my custom GIAC tune was programmed for by the owner of GIAC since I was sponsored by him personally.


You must be running a bleeding type MBC, the blocking type doesn't allow any pressure thru till it reaches the set pressure which means there wouldn't be any pressure trying to open the WG till the boost pressure is hit.
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  #16  
Old 02-03-2012, 06:19 AM
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Default wastegate creep

I have not reinstalled the mbc yet,since getting the giac x plus tune.I have the n75 j valve in and that s why Im leaky.I just installed a new tip today .What a job,difficult and not much room to work.I have the dual ceramic ball,spring mbc .I canged the spring from 5 lbs to 10 lbs and planning on putting it back in.Im just wondering if I should run the mbc and n75 parrellel.,
or just remove the n75 but keep it plugged
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  #17  
Old 04-03-2013, 08:34 PM
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How much boost can be pulled without tuning?
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Old 04-03-2013, 08:34 PM
 
 
 
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