k03 turbo with 260 + hp

[xburbx]

Someone please tell me why this isnt possible or why everyone isnt doing this. http://www.audilife.com/forums/showt...9&page=1&pp=15

[widm3r]

wow that is crazy, i really think im gonna do that, because if that is true that is the best bang for the buck(daaaaaaaaayem)!

[supermario]

maybe because its for the b6 a4 ???

[xburbx]

there has to be something to it that is not right or all of the turbo companies would do it instead of going witha k04. I'm lost, im looking for someone to play devils advocate because if not i would do this.

[DDQ]

275hp sounds outrageous to me. I think that claim is a big stretch.

Also, it's for B6s.

[widm3r]

damnit that got my hopes up a lot but one of you more experienced azer's with turbos want to chime in because im curious if their is any possible gains for a b5 doing this, cuase im still in hs and dont have the cash flow for a big turbo and this would be nice!

[RedRocket]

Here, how's this xburbx


I don't know about this. The post is not entirly clear. All it says is that:

1. Tilted compressor wheel or some sort of modification
2. Basically a port and polish to the cold side
3. and some "balancing" to the main shaft that connects the exhaust and compressor wheels I'm assuming

Not a single PSi rating and thats about it.

I'm still sticking with the theory about the KO3 being unable to produce "usefull" boost above a certain Psi due to heat. I think it's like 18 or something.

This was the part that really bothered me:

"Boost comes on and keeps pulling past 5,000 RPM, (where boost was minimal and fell off around 3500 RPM)."

Hello, the 5000 rpm part sounds like stock or maybe chipped with a bad by-pass valve. And dropping after 3500 RPM?

N75 J valve? 275 HP? WTF?

P.S I'm not turbo expert but I'm not an asshole either.

[Zodiak]

I'm gonna call BS on that one. Show me some real numbers, even some pictures of the modifications they did to the k03. Also running an upgraded turbo on standard aftermarket k03 software won't get you higher boost levels (it's basically like running a K04 on K03 software). If it were that easy, people would just be dropping T-28s in their cars left and right. It's all in the software, he didn't even say he was running an MBC. Also, notice how he never mentioned actual psi numbers? I doubt he even has a boost gauge.

skip

[Paul_858]

show me a dyno from an independent shop then i'll believe it.

[jesseahhstyle]

Originally posted by Paul_858
show me a dyno from an independent shop then i'll believe it.

Thats exactly what I was thinking Paul! Dyno then there might be a chance i might give into that... For now I call:

[mike-2ptzero]

Originally posted by xburbx
Someone please tell me why this isnt possible or why everyone isnt doing this. http://www.audilife.com/forums/showt...9&page=1&pp=15

First of its a Hybrid K04 with a larger K04 wheel in it. This is NOT a off the shelf turbo from 3k and if it comes apart 3k will not help you at all. This is not the first time someone has built a Hybrid K04, but as you can see those others have not lasted or had issues with tuning.

[EVIL-AUDI]

The K03 simply can't push enough to create that.

[xburbx]

I emailed the guy and this is what he said in response.

This should work on the B5 too. As for the turbo, the blades are a little more aggressive on the sport turbo but the shell should work the same, (just like the K04).

No, stock K03 will never flow enough volume to produce 260 HP. However, taking the same turbo and machining and fitting with proper tipping and compressor will. All while bolting back as original.

Your costs seem correct except the fuel injectors, (from the 225 Hp TT) are a lot more then $200, (more like $450).

I am in the process of looking into new software as existing APR software stage 1+ is still designed for stk K03. I am looking at Revo's software for the E05 turbo

[MKGIY]

I would like to see some hard numbers and pictures of this kit. I am sure his car is faster then stock, but unless he has numbers who is to know what the real story is.

Mike

[EVIL-AUDI]

Originally posted by MKGIY
I would like to see some hard numbers and pictures of this kit. I am sure his car is faster then stock, but unless he has numbers who is to know what the real story is.

Mike

Nothing compared to what you got.

[AudiMan]

i don't think teh K03 sport is really as big as the K04

[DDQ]

Originally posted by AudiMan
i don't think teh K03 sport is really as big as the K04

Actually, they are the same size. Just different turbines inside.

I also agree, running a K03 over about 18 psi is senseless, since all you do is blow hot air and lose power, while beating on your turbo. Sure, psi will go up due to the heat, but you're not flowing anymore air or gaining power.

[EVIL-AUDI]

Originally posted by DDQ
Actually, they are the same size. Just different turbines inside.

I also agree, running a K03 over about 18 psi is senseless, since all you do is blow hot air and lose power, while beating on your turbo. Sure, psi will go up due to the heat, but you're not flowing anymore air or gaining power.

exactly

[paul]

k03 w/ water injection, fmic, + -30* C weather might do it... actually k03 efficiency is good up to 14psi, 18 is already too much

[DDQ]

Originally posted by paul
k03 w/ water injection, fmic, + -30* C weather might do it... actually k03 efficiency is good up to 14psi, 18 is already too much

I agree. But I think the newer Audi's with the different K03 may be able to run a bit higher. If you look at a the compressor map, then you can easily see the normal K03 is happiest around 12-14 psi.

Too many people associate more psi with more power. If you think about how fast the K03 would have to spin to get more power, you'd see how much heat is generated. Also, it's been shown that the turbine starts to wobble on higher RPMs, and can start to cause damage to the internals.

I always find it amusing when people seem to brag about how they're running 20+ psi on their K03. Sure, it may work for awhile, but all you're doing is killing your turbo and not getting any additional power.

[Hassmeister]

Found that exceeding the efficency of the K03 is asking for trouble - Big Time!
Some guy on another site claimed he got high 13's in the 1/4 with is K03 and software and not much else. Yet, when a few of us went after him he got quiet on us.

[DDQ]

"According to Turbonetics in Moorpark, California, the stock K03 is happiest at about 12 pounds of boost because of the design of the blades: Going much further doesn't produce any really usable power. The K03 also uses a very small 4mm turbo shaft. Because of its size, the shaft becomes unstable excessive rpm, regardless of how well the turbo is balanced. As the shaft becomes unstable, it wobbles, and if the shaft wobbles, the blades will eventually scuff the side of the housing ... or worse.

Another limitation is the boost level itself. As was mentioned earlier, the K03 doesn't produce very good boost beyond about 12 lbs. The blade pitch is not designed to sustain boost beyond that threshold. This limits the 1.8T to about 200 hp with the stock K03 turbo.

Heat is another limiting factor. The K03 runs hot when pumping a lot of boost, as does any turbo. This is fine you leave the 1.8T alone and never mess with boost levels. But if you start increasing the boost, things get hot quickly. Even after moderate driving, the turbo will glow brightly enough to see in even dim light.

The K03 Sport does flow more air than the standard K03, and is capable of holding boost at the 15 psi level. Unfortunately, the K03 Sport was a stopgap measure. Modifying tile stock K03 worked, but reliability was a factor for some people. The thin shaft remained, so balancing the bigger wheels of the K03 Sport was even more important. It was also difficult, and as mentioned before, the slightest imperfection could cause the shaft to wobble and the impeller blades to impact the tile sides of the turbo - or worse - at higher boost levels. There just wasn't a lot of room to play with in the K03. To top it all off, excessive heat was still a factor. This was exacerbated in the K03 Sport because its greater capacity begged higher boost levels, which means even more heat.

The K03 Sport is a turbo modified to do something it wasn't really designed to. Provide sustained high-end power. it is possible, but reliability can be a problem in the long term."