B8 Ko4 owners follow up thread

[bbigskipper]

the wastegate rod can be on an angle to some extent, shouldnt be an issue. you just gotta loosen the hold down bolts on the compressor and rotate it. just don't overtorque the bolts, hand snug. they are M6 I believe which are easy to strip out in an aluminum compressor housing.

Thanks for the info, will give this a try. Also sounds like air testing the WG is easier than I thought, just put a bike pump on the actuator? What's a good pressure for K04, somewhere around 8psi?

[Spawne32]

Thanks for the info, will give this a try. Also sounds like air testing the WG is easier than I thought, just put a bike pump on the actuator? What's a good pressure for K04, somewhere around 8psi?

There is alot of question regarding this but I have always been told 8-9psi and you will feel the flapper start to get loose on the exhaust side. That is your crack pressure. When the flapper reaches its maximum thats your "open pressure".

[bb-tt]

With the Q5 tho. Do you have any quarter mile tracks near you?

I have a 2011 as shown in signature block (no e85 for me).

[EvolutionArmory]

Thanks for the info, will give this a try. Also sounds like air testing the WG is easier than I thought, just put a bike pump on the actuator? What's a good pressure for K04, somewhere around 8psi?

8 at a minimum. There’s really no need to go beyond 10.

[Grouch]

Just got my K04 + intake installed this past weekend. Car is throwing a C1555, P0300, P0302/3 code. I replaced my spark plugs with NGK BKR8EIX and gapped as per APR instructions and OEM R8 coils that I already had on. Not sure what could be the culprit? I read that it could possibly be a bad MAF sensor?

[A4x]

You're getting misfires on cylinder 2 and 3. Did it improve with the new spark plugs? How old were the old ones and what was the gap?

Move your #2 and 3 coils to cylinder #1 and 4 and see if the misfire follows them. If it does, bad coils.

Which tune are you running? Make sure it is not a 93 tune on 91 gas or something like that.

[Grouch]

You're getting misfires on cylinder 2 and 3. Did it improve with the new spark plugs? How old were the old ones and what was the gap?

Move your #2 and 3 coils to cylinder #1 and 4 and see if the misfire follows them. If it does, bad coils.

Which tune are you running? Make sure it is not a 93 tune on 91 gas or something like that.

I got the plugs installed when I got the K04 installed. Old plugs were NGK BKR7EIX gapped .28 but I was also running stage 2 back then.

I'm running APR K04 file, should be on 91. But I had to go back twice because they messed up the first time so who knows. Since it was after the 2nd time that I started throwing all these codes. I will try messing with the program switching to make sure I'm on the right mapping.

[90MkIIGti]

I hope yours comes to you in better condition than mine did. lol

Reading later it sounds like our kits were assembled with the same care?? 😂

My CTS K04 wasn’t too bad. Ordered in March and installed in April. I had to replace one hose from N75 to wastegate & now it looks like I’ll need the gasket for oil return to block?

Does your car seem to struggle with boost in 4th at WOT?

It takes mine boosting to 25/26psi before settling in around 22 or so. (I’m putting off the n75 swap bc I have big hands and it’s a PIA.

For oil, I’m going with a quick molygen oil change hoping to confirm location of “all” leaks. My car is also due for a new oil pan so “while I’m in there” I’ll give that a go.

[Traptalk]

Hopefully this fall we will see that when Perry gets back CONUS.

I doubt his heavy q5 would break 11’s without serious weight reduction, and probably drag radials

[Tusktopia]

New block is broken in. So I think it’s about time to make an appointment for the APR 93 K04 tune.

Shop offered awd dyno too. Is it worth Doing? Would I need two?

[Der Konig]

Might be oddly specific, but does anyone have a K04 (preferably BW/CTS if possible) with IE tune log they can send me? Trying to figure something out and need a healthy baseline.

[bb-tt]

Might be oddly specific, but does anyone have a K04 (preferably BW/CTS if possible) with IE tune log they can send me? Trying to figure something out and need a healthy baseline.

https://datazap.me/u/bb-tt/2020-07-0...d?log=0&data=1

see if you can see everything on there, if not pm me.

[Grouch]

New block is broken in. So I think it’s about time to make an appointment for the APR 93 K04 tune.

Shop offered awd dyno too. Is it worth Doing? Would I need two?

Don't think it's absolutely necessary but I've always wanted to do it to get some proper logs. Without fearing of losing my license.

[90MkIIGti]

New block is broken in. So I think it’s about time to make an appointment for the APR 93 K04 tune.

Shop offered awd dyno too. Is it worth Doing? Would I need two?

I don’t think you need to... I Dynoed after I broke in the upgraded clutch (k04 smoked the factory in 30 days). I did it for fun and for tangible data. It was just a cool thing to do on a Friday afternoon.

Why not‽

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[Tusktopia]

You weren’t kidding, that’s from this past friday. Alright so, maybe I’ll go ahead with it after all.

Numbers to beat : 341wtq & 319whp? Do you know if anyone has done better or worse?

Maybe everyone whose done one could post/link to their dyno for comparison, that’d be really great!

[Jason11213]

Hey guys - thought I would post my attempt to graph a log I did on Friday night. This was the first time I've used the Ross-Tech cable since I got it. I didn't get a chance to get to redline on this one but will do some more logs this weekend. Thank you to BB TT who sent me a lot of info on using VCDS. One thing I've noticed is my VCDS options are a bit different from the instructions I've looked at online. For example, I don't have measuring blocks, just adv measuring values. Also, the selection boxes when I'm setting up my log parameters are different (i.e. I have to choose charge pressure spec/actual instead of boost spec/actual). Anyways, this is the updated data using (boost - 993.75)*.0145. My pressure with the engine off read 993.75. All upgrades are in signature.

[Nano909]

You weren’t kidding, that’s from this past friday. Alright so, maybe I’ll go ahead with it after all.

Numbers to beat : 341wtq & 319whp? Do you know if anyone has done better or worse?

Maybe everyone whose done one could post/link to their dyno for comparison, that’d be really great!

Comparing dyno numbers is counter-productive. There are so many variables that can affect numbers, the only way that would work is if we were all using the same dyno in the same building on the same day. Comparing 1/4 mile times and trap speed is a better way.

[bb-tt]

Hey guys - thought I would post my attempt to graph a log I did on Friday night. This was the first time I've used the Ross-Tech cable since I got it. I didn't get a chance to get to redline on this one but will do some more logs this weekend. Thank you to BB TT who sent me a lot of info on using VCDS. One thing I've noticed is my VCDS options are a bit different from the instructions I've looked at online. For example, I don't have measuring blocks, just adv measuring values. Also, the selection boxes when I'm setting up my log parameters are different (i.e. I have to choose charge pressure spec/actual instead of boost spec/actual). Anyways, this is the updated data using (boost - 993.75)*.0145. My pressure with the engine off read 993.75. All upgrades are in signature.

If you have hex net interface see if you can log these values from 1800 rpm in 3rd thru the shift in 4th
if you cant log them all delete the highlighted measuring blocks

yep our cars are uds so you have to use adv measurig, all that datai sent you was from when i started logging with the tt. I just recently downloaded an updated ross tech guide. the channels in the quote above are a good ref to to start logging you can save them to a file and reload and delete and change as you log different things.

Edit: is that a hybrid?

[bb-tt]

You weren’t kidding, that’s from this past friday. Alright so, maybe I’ll go ahead with it after all.

Numbers to beat : 341wtq & 319whp? Do you know if anyone has done better or worse?

Maybe everyone whose done one could post/link to their dyno for comparison, that’d be really great!

I think that is about what Perry got for numbers

[90MkIIGti]

Comparing dyno numbers is counter-productive. There are so many variables that can affect numbers, the only way that would work is if we were all using the same dyno in the same building on the same day. Comparing 1/4 mile times and trap speed is a better way.

I don’t disagree with most of Specifically that there are several variables. However I don’t agree with the idea that’s it’s counter productive. The argument you’re making can be made about 1/4 and trap too.(- the machine) +tires + surface prep, etc.

For me, it was fun. It was also a way to validate all of the modifications.

It also allows for a more accurate estimate of HP to weight. Something you can’t get from just hitting the track.






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[Jason11213]

yep our cars are uds so you have to use adv measurig, all that datai sent you was from when i started logging with the tt. I just recently downloaded an updated ross tech guide. the channels in the quote above are a good ref to to start logging you can save them to a file and reload and delete and change as you log different things.

Edit: is that a hybrid?

Thank you for the clarification. I’ll add these on the next time I go out.

According to CTS’ website it’s not a hybrid. They had two options when I got mine: either the Borg Warner K04 or their K04. I went with their option and they specifically state it’s not a hybrid but the link is below.

https://www.ctsturbo.com/product/cts...-turbocharger/

[Der Konig]

https://datazap.me/u/bb-tt/2020-07-0...d?log=0&data=1

see if you can see everything on there, if not pm me.

Thank you! I'll look at it at work tomorrow and see what I can gather from it.

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[Perry01]

I think that is about what Perry got for numbers

341 WHP / 364 WTQ on a DynaPack dyno but like Nano said, comparing dyno numbers can be misleading. Acceleration is a better method of comparison.

[EvolutionArmory]

Comparing dyno numbers is counter-productive. There are so many variables that can affect numbers, the only way that would work is if we were all using the same dyno in the same building on the same day. Comparing 1/4 mile times and trap speed is a better way.

And just like dyno runs, trap speeds and ET’s can vary all over the country due to the DA of the track on the day the run was done. Heat and humidity can change a car’s performance by a lot. A car’s run in March or April will usually be quicker than in August.

Dyno’s are still valuable because there’s really no such thing as too much data. And with dyno pulls in the US, you have SAE correction factor which factors in atmospheric conditions to the pull.

[90MkIIGti]

You weren’t kidding, that’s from this past friday. Alright so, maybe I’ll go ahead with it after all.

Numbers to beat : 341wtq & 319whp? Do you know if anyone has done better or worse?

Maybe everyone whose done one could post/link to their dyno for comparison, that’d be really great!

I’d love to see other dyno numbers from other builds. That would be cool!

Yeah, that was last Friday afternoon. 85 degrees in the shop, 90 outside. It was super gross in Pittsburgh with really high humidity. I needed to get out of the “WFH” office situation.

I ran the APR 93 octane file. It was a semi-impulsive trip & I had a full tank so I didn’t look at the 100 octane map. Maybe I’ll go back in the fall and see where that plots out? Although that’s prob irrelevant. I’ll most likely only run 100 a handful of times.



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[EvolutionArmory]

I don’t disagree with most of Specifically that there are several variables. However I don’t agree with the idea that’s it’s counter productive. The argument you’re making can be made about 1/4 and trap too.(- the machine) +tires + surface prep, etc.

For me, it was fun. It was also a way to validate all of the modifications.

It also allows for a more accurate estimate of HP to weight. Something you can’t get from just hitting the track.






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Trap speeds and ET’s can change dramatically just depending on what side of the track you do your run at the same track 🤣 Or can change if you do a run a 6PM or 8PM.

I think JHM put the notion that the only real way to test your car is at the track into people’s heads but unless you have Dru driving your car and you’re in California, their numbers don’t mean anything about how your car performs either.

I would argue that the track is less of a valuable comparison because on top of all of the variables I already listed, you still have to be able to drive good.

The dyno takes a lot of those variable out. You don’t have to launch, the dyno might be climate controlled and the dyno uses SAE correction factors, which is a known common variable from dyno to dyno.

[Der Konig]

Thank you for the clarification. I’ll add these on the next time I go out.

According to CTS’ website it’s not a hybrid. They had two options when I got mine: either the Borg Warner K04 or their K04. I went with their option and they specifically state it’s not a hybrid but the link is below.

https://www.ctsturbo.com/product/cts...-turbocharger/

While it is not a hybrid, something DEFINITELY changed and I doubt it was for the better. The price dropped drastically, and it is no longer a genuine BW unit. When I got my BW version it must of been one of the last, they were having trouble sourcing them from BW. I imagine this led to decreases in sales due to long wait times (I think I waited about a month to get mine) so they outsourced a casting to be made and do the finishing work/assembly maybe.

I am very interested to see how these perform and the longevity of them, but I can't imagine its going to be on par with a large OE supplier quality like BW. All of their parts I have put on cars have been quality, so I still don't doubt its one of the better options on the market.

[90MkIIGti]

While it is not a hybrid, something DEFINITELY changed and I doubt it was for the better. The price dropped drastically, and it is no longer a genuine BW unit. When I got my BW version it must of been one of the last, they were having trouble sourcing them from BW. I imagine this led to decreases in sales due to long wait times (I think I waited about a month to get mine) so they outsourced a casting to be made and do the finishing work/assembly maybe.

I am very interested to see how these perform and the longevity of them, but I can't imagine its going to be on par with a large OE supplier quality like BW. All of their parts I have put on cars have been quality, so I still don't doubt its one of the better options on the market.

I bought the new CTS CHRA a few months ago. In the car for roughly 1500 miles.

Can keep you posted. So far 🤞🏼




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[Nano909]

And just like dyno runs, trap speeds and ET’s can vary all over the country due to the DA of the track on the day the run was done. Heat and humidity can change a car’s performance by a lot. A car’s run in March or April will usually be quicker than in August.

Dyno’s are still valuable because there’s really no such thing as too much data. And with dyno pulls in the US, you have SAE correction factor which factors in atmospheric conditions to the pull.

I said it's a better way, not 100% accurate. Didn't we already establish that we don't want you on the B8 forum? Go away.

[JLAllroad]

New block is broken in. So I think it’s about time to make an appointment for the APR 93 K04 tune.

Shop offered awd dyno too. Is it worth Doing? Would I need two?

Best case scenario would be...

Dyno stock to get a baseline, not only for your car but understanding how the dyno measures.

Dyno after the K04 and tune have been on for a couple days/weeks so you know it’s sorted and adapted.

This way you know your gain and if it is generally inline with what your mods should produce.

As has already been said, comparing dyno to dyno has little relevance due to the number of variables.


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[EvolutionArmory]

I said it's a better way, not 100% accurate. Didn't we already establish that we don't want you on the B8 forum? Go away.

You THINK it’s a better way but it’s just as flawed as a dyno, or maybe even more flawed because your car is only as quick as you can drive it.

You didn’t dismiss the dyno so much when you were defending K&N intakes. 🤣 Dyno numbers were the end all be all in that conversation.

[Nano909]

You THINK it’s a better way but it’s just as flawed as a dyno, or maybe even more flawed because your car is only as quick as you can drive it.

You didn’t dismiss the dyno so much when you were defending K&N intakes. Dyno numbers were the end all be all in that conversation.

Inferior B7 owners aren't allowed opinions on the superior B8 forums. Go away peasant.

[EvolutionArmory]

Inferior B7 owners aren't allowed opinions on the superior B8 forums. Go away peasant.

I don’t want to derail this thread bud. I was trying to have an adult and rational conversation with you about dynos VS track times but I guess you can’t.

[Nano909]

I don’t want to derail this thread bud. I was trying to have an adult and rational conversation with you about dynos VS track times but I guess you can’t.

I don't care about having any type of conversation with you. Don't reply to my comments or mention anything about what I've said before and you won't have any issues from me. What I said stands, no one wants your B7 owning self here.

[ReggieNoble]

You THINK it’s a better way but it’s just as flawed as a dyno, or maybe even more flawed because your car is only as quick as you can drive it.

You didn’t dismiss the dyno so much when you were defending K&N intakes. Dyno numbers were the end all be all in that conversation.

Not sure what's really going on in this thread but dyno's can easily lie, trap speeds tell the truth wether you can shift good or not. Good day!

[Nano909]

Not sure what's really going on in this thread but dyno's can easily lie, trap speeds tell the truth wether you can shift good or not. Good day!

👌👌👌

[EvolutionArmory]

Not sure what's really going on in this thread but dyno's can easily lie, trap speeds tell the truth wether you can shift good or not. Good day!

A high DA can kill your trap speed homie. Your 350 HP car should be able to run 105 MPH plus but if your DA is high that day, your trap speed will be low.

They dyno not only tells you your wheel HP and torque but also lets you see your powerband. That’s some pretty useful info. Seeing where your car makes its highest horsepower and what your torque curve looks like is way more valuable than knowing if your car runs a 1/4 in 12.5@107 or whatever.

Just an opinion.

[ReggieNoble]

A high DA can kill your trap speed homie. Your 350 HP car should be able to run 105 MPH plus but if your DA is high that day, your trap speed will be low.

They dyno not only tells you your wheel HP and torque but also lets you see your powerband. That’s some pretty useful info. Seeing where your car makes its highest horsepower and what your torque curve looks like is way more valuable than knowing if your car runs a 1/4 in 12.5@107 or whatever.

Just an opinion.

Sure a car at sea level will be faster than the same car at let's say 3750 feet. That's pretty obvious my friend. And even at 3750 feet you looking at roughly .17 difference in et and about 1.7 difference in mph. So it's safe to say it's not hard to use a simple correction factor to determine the difference in sea level. Now with a dyno, it's all up to the operator and how there feeling that day. Just changing the load on the rollers can add 50+ hp

[EvolutionArmory]

Sure a car at sea level will be faster than the same car at let's say 3750 feet. That's pretty obvious my friend. And even at 3750 feet you looking at roughly .17 difference in et and about 1.7 difference in mph. So it's safe to say it's not hard to use a simple correction factor to determine the difference in sea level. Now with a dyno, it's all up to the operator and how there feeling that day. Just changing the load on the rollers can add 50+ hp

DA being high can make your track that’s at sea level feel like it’s 1000’s of feet above sea level. New England Dragway is 200 feet above sea level but current DA is 2247 feet 😉 That’s a pretty wide swinging variable and it changes all day.

[jrisk]

Currently in the hunt. I’ve been reading a lot but I would like to get a collective opinion from k04 owners with these setups.

I will either go with the new kit CTS offers or JHM. Looking for pros/cons, experiences, etc from owners of these set ups. Thanks !


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