Ill just leave the rest of your dibble alone since this one just kills me! A ko3 at 1bar is nothing. you can run a k03(s) to 20psi daily for many years, people have run chips for years and years running 20-22psi everyday and still have the stock turbo after 120k miles and chipped since 20-30k. If there isnt much power after 14.5psi, why are people picking un 15-20hp from bumping up to 20?

I dont know where the overconservative numbers comes from on this forum, but some people need to branch out of their shell and see what their cars can really do.

 

my friend was hittin 21psi with a stock turbo! however it didnt last long, maybe 1,000 miles....the kid used and abused that car for sure!

 

what didnt last long, the turbo or the car? Im a 100% confident if the turbo died it wasnt from 21psi, it was on the way out before then.

 

VAG block 115.

 

Anytime you increase boost you will see a HP gain. But if you read the compressor chart for the K03, you will see it's being over spooled at much over 1bar. yes, you can run it over 1bar, & it will still provide power. My main point is running over 1bar tapper to redline. Running over 1bar at 6500RPM's is much more stressful on the turbo then running over 1bar @ 3500RPM's.

It's not that the turbo will not make more power, it will make more power till it seizes. But there is a sweet spot for turbo's & the K03's is around 1 bar, where it's the most efficient. 1bar is NOT always 14.7, it changes with air temp, air density, barometric pressure & altitude. My point is, you don't add a stand alone MBC, & just crank it up. There is more to it.

Your friends running over 20psi, is that all they have? I highly doubt it, they properly have a chip, DP, maybe a cat delete? That all helps prolong the turbo life. The cat right off the Turbo retains a ton of heat, this in it's self doesn't prolong turbo life @ high boost. I'm not arguing with you that there are power gains, & you can do it. Just that if you do JUST add a MBC & crank it Turbo life will suffer. Even my EVO spikes at almost 2bar, then tappers off to about 1.5 around redline.

If some one wants to donate their 1.8t I will do some logs with boost & AFR & show you what I'm talking about. We can do some timing runs & see what's faster, higher boost alone, or slightly higher boost with Lemi tweaks. Also show what EGT's get up with just pumping more boost with out fuel & tuning.

You STILL NEED TO ADD FUEL WHEN YOU INCREASE BOOST! If you adjust boost with fueling, it's just dumb.

 

i blew my ko3 turbo with just a mbc. i didnt even last 1000 miles. and the turbo was in fine shape before i cranked the boost up

 

mines still strong!!

 

cincytt i still want to know what your running. what are you doing for fuel?

 

https://www.audiforums.com/m_477476/tm.htm

 

Looks like a 4b FPR, & a TCD (diode) & MBC.

I would still want to log the car & see what the EGT's & O2's are at. Also, you know Lemi is free is you have a Vag-com cable, & lets you play with fuel & timing.