I've decided K04-015 Upgrade

[Fly_R_Die]

I drive a 2000 Audi A4 1.8T 5spd 143,000 mi and I want to upgrade the turbo to the K04-015. I know there are a million and one threads on this lol but most of them are pretty old. I want to get the most out of the K04 I get and I had a few questions for the forum

#1: What do I need??
-Borg Warner k04-015
-New TIP??
-Downpipe
-Upgraded exhaust
-Injectors?? (if so which kind)
-AFPR?? (if so which kind)
-MBC
-PC-16 GIAC Tune
-FMIC??

#2: Where is a good place to purchase a K04-015? I wouldn't mind getting a slightly used one, but I prefer not to.

#3: Is there anyone running a setup like this on their B5?

If there is a certain thread that I overlooked that answers all of these questions a link would be greatly appreciated. Also this car is my DD and my goal is maybe around or over 220 HP.

[Scientist]

Besides upgrading to a KO4, I got a tune, a high-flow cat and a wider exhaust, and the 2.0 FSI Coils and iridium plugs. More than happy as my DD.

[howardfootball]

Seriously dude, just get a Frankenturbo. The K04 is an obsolete upgrade for the B5 now that the FT is well established. And all your questions have been answered a hundred times before.

[A1 A2 German]

Seriously dude, do not go with anything with the kkk flange, there's a thousand reasons not to rock it and not a single to keep it.

[melomandn]

Seriously dude, just get a Frankenturbo. The K04 is an obsolete upgrade for the B5 now that the FT is well established. And all your questions have been answered a hundred times before.

this

[morzechowski]

or just save your money. Dumping all that cash into a small turbo kit that still makes your old a4 slower than many cars on the road today is not worth it in my opinion. you will have maybe 300 crank hp at the most with a k04 or frankenturbo. A hyundai sonata makes that power lol.

[zandrew]

There are rewarding K04 turbos out there like franken. However if you can do a little custom work or willing to have it done you can actually get another Borg Warner K04 turbo and have it fitted for less then $800 and it actually has the potential to make some serious hp considering its size. It is quite bigger then the franken.

It would basically be the ultimate upgrade that still allows for stockish spool.

Sooo many people see K04 and write it off as being to small since bigger turbos are utilized more often. Most don't even pay attention to a the compressor map.

[M-Hood]

Seriously dude, do not go with anything with the kkk flange, there's a thousand reasons not to rock it and not a single to keep it.

And yet one good one to do it, it looks 100% stock. lol

Look at how many fast A4's there are with KKK flanged turbo setups, even to the point of running just as quick as some other people have done with BAT setups.

There are rewarding K04 turbos out there like franken. However if you can do a little custom work or willing to have it done you can actually get another Borg Warner K04 turbo and have it fitted for less then $800 and it actually has the potential to make some serious hp considering its size. It is quite bigger then the franken.

It would basically be the ultimate upgrade that still allows for stockish spool.

Sooo many people see K04 and write it off as being to small since bigger turbos are utilized more often. Most don't even pay attention to a the compressor map.

Anything that spools like a BT can't really be considered "stockish" spool. lol

[zandrew]

And yet one good one to do it, it looks 100% stock. lol

Look at how many fast A4's there are with KKK flanged turbo setups, even to the point of running just as quick as some other people have done with BAT setups.




Anything that spools like a BT can't really be considered "stockish" spool. lol

LOL, good thing I was talking about K04 and NOT a BT.

[A1 A2 German]

And yet one good one to do it, it looks 100% stock. lol

Look at how many fast A4's there are with KKK flanged turbo setups, even to the point of running just as quick as some other people have done with BAT setups.

This is correct, and if you want to remain in 100% stock-ish form, and as well and contradicting to my post.....I......have a Gt2871r eliminator KKK system, which is quite fast. So quick, I'm wondering if my full frame system will be able to hang which I'm going to swap in. I was responding from a phone so didn't elaborate. You can, have a hassle free, fast KKK system no doubt. And not to back track, but there maybe a couple reasons you may want it as some one my have absolute zero down time on a car and have only till midnight to finish their car so they can make it to work in the morning, etc, etc.

However, what's a GT2871r eliminator KKK cost? $1600!!!!!! --->>> http://www.atpturbo.com/mm5/merchant...de=ATP-VVW-151 or....$1400 off Mike ;).
My rant, or logic is, for what a KKK system costs......you can get 3 times outta of it (or say it 3 times cheaper and much faster if you want) if you swapped to a t25/t3/t4 flange system....hell....need a Ko4-015 KKK turbo? $900 but need to find another journal t25/t3/t3 Garret turbo in the snap of a finger....$300 shipped. Hell, buy a low mileage one every year at that cost.

As much as I 100% love the longitude system, I just wish it came with a T3 system or so, then...turbo bolt on galore! But that's an easy fix changing the manifold.

I'm not saying go bat, I'm saying ditch the kkk system, so when in need of new turbo you have 1000 choices and can find one even on your local Craigslist...opposed to $900 and have to wait a week to receive it....and, make's less power.

This, is a good example for $1000!!! Awesome......http://www.audizine.com/classifieds/...jectors&cat=20 Blow that turbo or goes bad, no problem, you'll have so many to choose from your head will spin.

Of course my post is some fact, some opinion. Good luck!

[DeathKing]

In addition to what everyone else has said, here is a good review of the cost of NEW setups...

http://forums.vwvortex.com/showthrea...ade-Kit-Thread

[M-Hood]

This is correct, and if you want to remain in 100% stock-ish form, and as well and contradicting to my post.....I......have a Gt2871r eliminator KKK system, which is quite fast. So quick, I'm wondering if my full frame system will be able to hang which I'm going to swap in. I was responding from a phone so didn't elaborate. You can, have a hassle free, fast KKK system no doubt. And not to back track, but there maybe a couple reasons you may want it as some one my have absolute zero down time on a car and have only till midnight to finish their car so they can make it to work in the morning, etc, etc.

However, what's a GT2871r eliminator KKK cost? $1600!!!!!! --->>> http://www.atpturbo.com/mm5/merchant...de=ATP-VVW-151 or....$1400 off Mike ;).
My rant, or logic is, for what a KKK system costs......you can get 3 times outta of it (or say it 3 times cheaper and much faster if you want) if you swapped to a t25/t3/t4 flange system....hell....need a Ko4-015 KKK turbo? $900 but need to find another journal t25/t3/t3 Garret turbo in the snap of a finger....$300 shipped. Hell, buy a low mileage one every year at that cost.

As much as I 100% love the longitude system, I just wish it came with a T3 system or so, then...turbo bolt on galore! But that's an easy fix changing the manifold.

I'm not saying go bat, I'm saying ditch the kkk system, so when in need of new turbo you have 1000 choices and can find one even on your local Craigslist...opposed to $900 and have to wait a week to receive it....and, make's less power.

This, is a good example for $1000!!! Awesome......http://www.audizine.com/classifieds/...jectors&cat=20 Blow that turbo or goes bad, no problem, you'll have so many to choose from your head will spin.

Of course my post is some fact, some opinion. Good luck!

Are you switching to a completely different setup with the T3 housing or just putting your GT2871 Elim turbo into a T3 housing?

I don't think the Eliminator housing is as much of a restriction as most people think it is. Just think, you could take your eliminator housing and stuff a CT2 journal bearing turbo into it for $849. Only thing you would have to change is your intake setup since the CT2 has a 3" inlet like a full frame GT2871r. lol

With that setup you could even go without coolant lines since the CHRA can be done in oil only.

[zandrew]

I'd say the stock manifold is more a restriction then the turbine housing is. I actually can't see how the housing is if it is properly designed which I am sure they basically mimic the regular GT nozzle design and AR. You can get a 3" downpipe on it is as well so thats not that big of a deal either. The stock manifold I am sure could benefit from some porting but they make high flow replacements.

Hell you can even get a GT3071 and 3076 in the eliminator setups.

Mike I prefer running the coolant lines and would only consider not running them if it absolutely necessary. Also I had no clue the CT2 used the same turbine head. Thats pretty cool. The only issue there is the price of those turbine manifolds is rediculous. I was going to put together a custom GT2571 and tried to find one and they are over $400. Can you get a better price on them by chance?

[M-Hood]

I'd say the stock manifold is more a restriction then the turbine housing is. I actually can't see how the housing is if it is properly designed which I am sure they basically mimic the regular GT nozzle design and AR. You can get a 3" downpipe on it is as well so thats not that big of a deal either. The stock manifold I am sure could benefit from some porting but they make high flow replacements.

Hell you can even get a GT3071 and 3076 in the eliminator setups.

Mike I prefer running the coolant lines and would only consider not running them if it absolutely necessary. Also I had no clue the CT2 used the same turbine head. Thats pretty cool. The only issue there is the price of those turbine manifolds is rediculous. I was going to put together a custom GT2571 and tried to find one and they are over $400. Can you get a better price on them by chance?

Why do you want to run a 54/71 compressor wheel in a huge .70 a/r compressor housing with a tiny 46mm exhaust wheel on the back? Going big compressor wheel with a tiny exhaust wheel is so backwards seeing that the exhaust wheel is going to max out way before the compressor wheel does. You can't push out what you can't get in. The exhaust wheel exducer should be the same or slightly larger then the compressor wheel inducer.

[zandrew]

Its not a huge .70 comp housing, it is .60 or any other size I would please like a .48 (being able to machine can do wonders). Its not the ideal setup I completely agree but it would spool faster which was my concern. I am obviously notusing it since I have GT2871R and GT3076R as well. I have built this turbo for someone else. I used all Garrett bits. The hotside was .64 and the cold was .60 T04B.

It is good to have balance between the sides and I agree completely with you but if you compare the GT25 turbine to a GT28 turbine they are very similar in size and performance. The GT25 turbine flow with the .64 is 16 lb/min at 2.00 where it levels off. The GT28 with .64 is 18 lb/min flow. The GT28 turbine exducer is 53.8mm. The GT25 is 53mm, not very different. The GT25 turbine exducer is very close to the GT2871R 56 compressor inducer which is 53.1mm. It is bigger then some of the smaller 71 compressors.


There is 2 different GT28 turbines. One is the 56 trim and the other is 76 trim. The 56 trim turbine map is very close to the GT25 turbine map.

The one I built for a customer went on a D15. It made very close to 300whp at 14psi and the owner remarked it spooled like the S14 turbo he had before which had the craptastic ceramic turbine. I will try to find the dyno for it.

[juxsa]

before we start talking about upgrading turbo's, what are the stats on your car? What tune are you running? do you have an exhaust? do you have an upgraded IC? If you go and get a tune and throw on a quality FMIC it can work wonders with the stock turbo. I too want to upgrade to a better turbo but between the fine tuned REVO flash, exhaust, and the forge FMIC, the little K03s still has some life in it.

What I would recommend if your turbo is still in decent shape is to spend the money on exhaust, FMIC, and a tune. After that, save some $$$ and look at turbos. I plan on upgrading to a Frankenturbo setup but I'll wait until my turbo takes a dump.

I drive a 2000 Audi A4 1.8T 5spd 143,000 mi and I want to upgrade the turbo to the K04-015. I know there are a million and one threads on this lol but most of them are pretty old. I want to get the most out of the K04 I get and I had a few questions for the forum

#1: What do I need??
-Borg Warner k04-015
-New TIP??
-Downpipe
-Upgraded exhaust
-Injectors?? (if so which kind)
-AFPR?? (if so which kind)
-MBC
-PC-16 GIAC Tune
-FMIC??

#2: Where is a good place to purchase a K04-015? I wouldn't mind getting a slightly used one, but I prefer not to.

#3: Is there anyone running a setup like this on their B5?

If there is a certain thread that I overlooked that answers all of these questions a link would be greatly appreciated. Also this car is my DD and my goal is maybe around or over 220 HP.

[M-Hood]

Its not a huge .70 comp housing, it is .60 or any other size I would please like a .48 (being able to machine can do wonders). Its not the ideal setup I completely agree but it would spool faster which was my concern. I am obviously notusing it since I have GT2871R and GT3076R as well. I have built this turbo for someone else. I used all Garrett bits. The hotside was .64 and the cold was .60 T04B.

It is good to have balance between the sides and I agree completely with you but if you compare the GT25 turbine to a GT28 turbine they are very similar in size and performance. The GT25 turbine flow with the .64 is 16 lb/min at 2.00 where it levels off. The GT28 with .64 is 18 lb/min flow. The GT28 turbine exducer is 53.8mm. The GT25 is 53mm, not very different. The GT25 turbine exducer is very close to the GT2871R 56 compressor inducer which is 53.1mm. It is bigger then some of the smaller 71 compressors.


There is 2 different GT28 turbines. One is the 56 trim and the other is 76 trim. The 56 trim turbine map is very close to the GT25 turbine map.

The one I built for a customer went on a D15. It made very close to 300whp at 14psi and the owner remarked it spooled like the S14 turbo he had before which had the craptastic ceramic turbine. I will try to find the dyno for it.

That is odd.



Sure looks like a .70 a/r housing to me. Exact same housing they used on the old GT2540.




I don't see the point of going to that turbo if you are already have a GT2871r, you end up giving up the ball bearing CHRA and end up with a larger compressor housing unless you custom build it with a smaller housing.

[QuattroGinger]

I drive a 2000 Audi A4 1.8T 5spd 143,000 mi and I want to upgrade the turbo to the K04-015. I know there are a million and one threads on this lol but most of them are pretty old. I want to get the most out of the K04 I get and I had a few questions for the forum

#1: What do I need??
-Borg Warner k04-015
-New TIP??
-Downpipe
-Upgraded exhaust
-Injectors?? (if so which kind)
-AFPR?? (if so which kind)
-MBC
-PC-16 GIAC Tune
-FMIC??

#2: Where is a good place to purchase a K04-015? I wouldn't mind getting a slightly used one, but I prefer not to.

#3: Is there anyone running a setup like this on their B5?

If there is a certain thread that I overlooked that answers all of these questions a link would be greatly appreciated. Also this car is my DD and my goal is maybe around or over 220 HP.

this really depends on how far you want to go. my wastegate diaphragm just went finally on my ko3s at 160k. so i went Franken.


i dont know your current setup but my FT setup came with turbo, inlet hose, high flow mani, new MAF housing.

those are the deff recommendations to me. my APR exhaust bolted right up without modification. i also added a test pipe. i do have injectors however im waiting to get tune done so when that is finished i will add the injectors with the tune. i went with Genesis 415CC over Green Giants because they have same spray pattern as the OEM injectors. FMIC is recommended but not required. if you have heat soak then yes. im trying to find a evo setup myself to fit behind stock bumper for now.

[Beech]

dont mean to thread jack but ive been thinking about doing an upgraded k04 myself great to see the updated info but now i gotta take a step back and possibly consider the t3/t4 set up whats a good t3/t4 manifold to go with for the b5?

[zandrew]

I am not going to that turbo. The turbo I am referring to specifically is one that was built from all Garrett components and used the GT25 turbine and GT2871 56trim compressor. That is the same compressor as the GT3071R compressor. There is a multitude of different compressor housings that will work. I know of 5 right off the top of my head. That is the T04E comp housing in the picture but for whatever reason China marked it with .70AR instead of the .60 AR. You can also get the T04Z, T04S, T04B, a .50 AR, and .60 AR bolt on for the Nissan style housings like the S13, S14, etc.

I was going to build a GT2571 for myself BEFORE I came across the GT3076R and my GT2871R.


All the GTR ball bearing turbos from the GT2554 up to the GT30 use the same size compressor hub which .236" diameter. The lengths are different but you can machine the top down to work. If you actually look closely at the crap turbo above you will notice it does not have the 6 sided nut that most Garrett style compressors have. All you have to do make a bigger compressor work in any GT25-GT30 is swap the compressor, buy the accomadating back plate that snaps one the center housing, and then either buy the correct housing or have yours machined. Also a VSR balance is a must.

I also got my exducer mixed up above on the turbine. Most of the Garrett turbos and the minimum standard is that you want Inducer size to be comparable on both sizes. That was what I was referring too. The GT2871R uses the 53mm compressor inducer and 53.8 turbine inducer.

The Mutt GT2571 I mentioned is not something I suggest. You can't push it above 350 chp due to the exhaust restriction the smaller turbine creates and you will suffer pumping loss. It can work OK up to that point though.

[zandrew]

The Spa top mount looks nice. If you are considering a K04 the T3T4 is quite a jump and loss in drivability as well. Something in the T28 line will be better suited if you want to push the stock block and maintain as much of factory like turbo response as possible. M Hood has some nise CT2 Comp turbos that fit the bill and won't break the bank plus they come with T3 flange. Depends on your budget.