K04/Hybrid & Big Turbo Support Group

[Traptalk]

If tbo makes the z, and cts makes the X, whose gonna make the Y ? Hpa?

[JLAllroad]

Yeah, I had a feeling that was the case. I have 10.5° of advance now with 91 octane. I wonder if I can get 16° of timing advance on an E40 blend?

A few things. @Perry01

I would say the lowest E% that gets you where you want to be will ultimately have the greatest fueling headroom, granted ambient temperatures alter that need greatly.

Is IE able to use the FF switching to adjust to any E% variable similar to APR? I have seen variances from 55-67% (on virtually an empty tank).

I’m wondering if the huge drop in WG DC is the cause of you not hitting requested in the midrange as it does seem to catch up at the top of your pull.


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[Iceman502]

Lol that guy was me

Although it may be coincidence since the eBay thread has started we’ve now seen newer Chinese hybrids like the tbo that seem to follow some of the ideas we were playing with in the eBay thread, like different blade geometries and adjustable spring/piston wastegates) as well as two different budgeted cts options now, one following the clipped wheel trend.

Again could be total coincidence but I mean if you were testing the waters for a new product wouldn’t it make sense you would see what the community is up to and try to fill the void where the demand is needed? For us it’s obscure k04 hybrids 😂

Wonder if they’ll make an in between turbo between k04 and their boss kits or if that’s what this X model is supposed to be

Look forward to the data either way

How about a copy of the Loba turbo outlet with no muffler just happening to show up maybe 2-3 months after we debated their effects here? On the same turbo frame from the same distributor.... I had emailed the vendor on eBay and asked about them so who knows, maybe they do take a casual peek.

Also thank you for the data point Perry regarding the WG

[JLAllroad]

You have proven documented results that your turbo and tune runs as good as APR V1 did in 2014 is what I think you meant to say

And if you look back when JHM first introduced the K04R you would learn that it was just going to be a turbo option with no real plans on doing software for it. As you found out the hard and expensive way, tuning your ECU isn’t exactly easy.

You guys like to blame me for threads going sideways but really, it’s your inability to admit your limitations and admit that you don’t really know what you’re doing. You’re arguing with a company that does this for a living and has made some pretty decent passes on pretty decent hardware all the while you guys are making every possible mistake you can. And some how in your twisted logic you think what you’re doing is better. JHM isn’t perfect and they have all the same problems any medium sized business can have.

It’s easy to give them a hard time when you slapped together a turbo and got some guy in his garage to tune it. If you tried to do this for a living you’d probably fall on your faces. But you’re just some guy who built 1 turbo and got some other guy who doesn’t know how to tune it or doesn’t have the right equipment to do so if he does know how.

The fact is, every car in this subforum running a K04R and APR V2 or 3 runs better than your eBay turbo and HP Tuner tune.

Sorry to be blunt but you kinda need to hear this.


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@EvolutionArmory, have you set up a thread dedicated to the value of wastegate and crack pressure tuning?

Might be a beneficial place to link those in need while cutting down on pages of repetition.


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[Spawne32]

How about a copy of the Loba turbo outlet with no muffler just happening to show up maybe 2-3 months after we debated their effects here? On the same turbo frame from the same distributor.... I had emailed the vendor on eBay and asked about them so who knows, maybe they do take a casual peek.

Also thank you for the data point Perry regarding the WG

Or the fact that I suggested swapping a different CHRA into the CTS turbo because you can do that with basically any hybrid. lmao

[Traptalk]

Or the fact that I suggested swapping a different CHRA into the CTS turbo because you can do that with basically any hybrid. lmao

This new cts option is like a budget loba if it uses a larger compressor wheel

Funny that cts was too cheap to delete the muffler but the Chinese vendor isn’t lol


Very weird that tbo made a loba copy because it wasn’t the most popular hybrid. I was like the second person to run it and share here slowone11 being first years before but we probably filled up a few pages debating muffler deletes after I posted a few pics when I got the loba

I mean look at the eBay thread it has over 200k views and 5400 comments

Our bickering probably makes the page look way more popular that it really is 😂

Our bickering is the catalyst that drives progression 😂

[JLAllroad]

Or the fact that I suggested swapping a different CHRA into the CTS turbo because you can do that with basically any hybrid. lmao

Well I did pick up my Enhanced CHRA from a member that was running it in his JHM-K04R until he decided that he wanted to go BT.

Yes it’s a B7 but I love seeing people try new things....

K04r Build
https://www.audizine.com/forum/showpost.php?p=14128090



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[EvolutionArmory]

@EvolutionArmory, have you set up a thread dedicated to the value of wastegate and crack pressure tuning?

Might be a beneficial place to link those in need while cutting down on pages of repetition.


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I had it all laid out in the other thread. Posted graphs of what one setting did VS the next with MAF readings going up with every change. Had logs posted with it set to 6, 8 and 9 proving what each change made. It didn’t translate to the same changes for them because they were all running a shitty tune.

But some people also couldn’t get past the fact that I have a B7 and don’t realize that the turbo will react very similarly in a B7, B8 and B8.5 because they have the same displacement and the power bumps as you go up from a B7, B8 and B8.5 aren’t that big. A B8 only makes a few percent more power than a B7 and a B8.5 only makes a few percent more than a B8. Each generation can squeak a little more out of it than the last. And those power gains are mostly due to gearing, and fueling (E85 and timing) not necessarily just the motor improvements over the 3 motors.

Why make a new thread when people aren’t going to follow good advice anyway? People are just going to follow terrible advice because that’s the world we live in now.

The blind leading the blind.


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[Spawne32]

Well I did pick up my Enhanced CHRA from a member that was running it in his JHM-K04R until he decided that he wanted to go BT.

Yes it’s a B7 but I love seeing people try new things....

K04r Build
https://www.audizine.com/forum/showpost.php?p=14128090



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lol Was it the one I sold him?


Edit: Yes it was. lmao Thats my workbench in the pictures.

[Spawne32]

lol I sold it to him on facebook, he asked if it would fit in his JHM turbo and I explained to him how it worked.

[Perry01]

A few things. @Perry01

I would say the lowest E% that gets you where you want to be will ultimately have the greatest fueling headroom, granted ambient temperatures alter that need greatly.

Is IE able to use the FF switching to adjust to any E% variable similar to APR? I have seen variances from 55-67% (on virtually an empty tank).

As you know, flex fuel vehicles use a sensor to determine the amount of ethanol in your fuel and your ECU adjusts the timing and fueling maps accordingly. APR’s manipulates the scaling for even more benefit. I’m going to start out with an E40 blend and see how well my ECU adapts. Hopefully I will see between 16° and 18° of timing advance with adequate fueling on my current file. If this is the case, I may just leave well enough alone.

IE just moved to a new location and they are very busy making and shipping their products from their Black Friday sale. They’ve already bent over backwards for me I don’t want to be a bother.

I’m going to buy 20 gallons of E85 on Thursday and I’ll post some logs after I do some experimenting.

[Dpartinvr4]

lol I sold it to him on facebook, he asked if it would fit in his JHM turbo and I explained to him how it worked.

Yeah it was me, it worked great

[JLAllroad]

Yeah it was me, it worked great

Looking at some of the results that you had and how it’s working for @Traptalk I’m hoping it has the headroom to get me close to requested @5300ft running APR’s E85 KO4 file. Shooting for a low 13 at this altitude.


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[Dpartinvr4]

I ran a 13.4 at 6800'da on 93 with meth on a 100° day, you should get it no problem.

[JLAllroad]

As you know, flex fuel vehicles use a sensor to determine the amount of ethanol in your fuel and your ECU adjusts the timing and fueling maps accordingly. APR’s manipulates the scaling for even more benefit. I’m going to start out with an E40 blend and see how well my ECU adapts. Hopefully I will see between 16° and 18° of timing advance with adequate fueling on my current file. If this is the case, I may just leave well enough alone.

IE just moved to a new location and they are very busy making and shipping their products from their Black Friday sale. They’ve already bent over backwards for me I don’t want to be a bother.

I’m going to buy 20 gallons of E85 on Thursday and I’ll post some logs after I do some experimenting.

@E40 you should see fuel trims +15-20% depending on the ethanol content of the E85.


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[Perry01]

@E40 you should see fuel trims +15-20% depending on the ethanol content of the E85.

I understand that the ethanol content in E85 sold at the pump varies. That’s why I’m going to add E85 to my tank and use VCDS to display the ethanol content in my fuel tank. I’ll add gas or E85 to reach my desired blend.

[JLAllroad]

I understand that the ethanol content in E85 sold at the pump varies. That’s why I’m going to add E85 to my tank and use VCDS to display the ethanol content in my fuel tank. I’ll add gas or E85 to reach my desired blend.

Takes about 3-5 miles for it to clear the line and register the content change.


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[bb-tt]

That APR time slip of 12.8@105 was in 2014 and on 93 octane. So unless he threw a K04 on a car that still had 3 years of warranty left, it’s safe to say it was pre facelift. 🤣

I could be wrong. Cory’s Sig doesn’t say and I don’t know him.


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First B8 A4 into the 12's?
[email protected]
DA was ~ -500
APR K04 V2 93 tune with pump gas

Lots of other 12.88 and 12.89's to back it up.....top trap of the day was 106.5.

No Longer Available
One of kind 2009 B8 A4 K04 bagged Avant with a RIDICULOUS amount of tasteful mods and only 35K miles

A truly one of kind 2009 B8 Avant with under 57k KM (only 35k miles!), meticulously maintained/protected.....looks brand new. Since my move to Alberta I've purchased a third recreational vehicle and just don't use my Avant as much as it deserves. I'm hoping to find the right new home.

It started life out as a loaded Sport/Tech /NAV/B&O spec but things have changed...considerably ;)

Just SOME of the highlights.....
- completely upgraded to 3G Plus NAV
- K04 w/ APR tune (fastest pump fuel A4...12.8 second 1/4 miles)
- upgraded plugs, coil-packs
- APR exhaust, Carbonio intake
- Eurocode FMIC, inlet pipe, crank pulley
- GFB Diverter Valve
- 034 Motorsport Catch Can kit and Transmission mount
- BBG forged wheels plus another set of winters, all with Michelin tires
- Airlift/Ridetech/AZ Air suspension with iPhone and key fob remote control
- Stasis ARB
- Eurocode Alu Kreuz
- Carbon fiber mirrors, front lip, valence, grill, fog covers, interior trim
- upgraded B&O w/ subwoofer/amp and high-end Hertz speakers
- AWE boost gauge
- RS6 flat-bottom steering wheel and shifter
- OEM Avant load securing system
- OEM From/Rear/Camera Park distance
- RS4 LED Tail lights
WAY too much to list!!!
More pics to follow.

*** Zero oil consumption issues, always garage kept, paint and front-end protected, no accidents***

In order to import this car from Ontario to Alberta (I've just moved) it just had to be thoroughly inspected and passed everything with flying colours....as expected.

I'm located in Calgary, AB and US buyers would have to import etc. but I trust you that this car is worth it.


List Date: 1/12/2016

For more info, click here to view the original listing: One of kind 2009 B8 A4 K04 bagged Avant with a RIDICULOUS amount of tasteful mods and only 35K miles



so unless i am wrong us guys that dont know anything are actually running faster on the street than corey ran on the track. Draggy is known to run .02 to .05 slower than a track timer. And you still have not pointed out a single b8 running under 12.8 and you have to go back to 2014 to find a b8 running that who also had lightweight forged wheels, full exhaust and a -500 DA. so yeah i will stick with playing with hp tuners as it keeps getting quicker and if i didnt have stock exhaust and ditched 20 inch stock wheels would probably already be in 12.7s or lower

4 consecutive runs on street with wheel spin, but yeah we are morons you are the only one that knows anything.

[Nano909]

No Longer Available
One of kind 2009 B8 A4 K04 bagged Avant with a RIDICULOUS amount of tasteful mods and only 35K miles

A truly one of kind 2009 B8 Avant with under 57k KM (only 35k miles!), meticulously maintained/protected.....looks brand new. Since my move to Alberta I've purchased a third recreational vehicle and just don't use my Avant as much as it deserves. I'm hoping to find the right new home.

It started life out as a loaded Sport/Tech /NAV/B&O spec but things have changed...considerably ;)

Just SOME of the highlights.....
- completely upgraded to 3G Plus NAV
- K04 w/ APR tune (fastest pump fuel A4...12.8 second 1/4 miles)
- upgraded plugs, coil-packs
- APR exhaust, Carbonio intake
- Eurocode FMIC, inlet pipe, crank pulley
- GFB Diverter Valve
- 034 Motorsport Catch Can kit and Transmission mount
- BBG forged wheels plus another set of winters, all with Michelin tires
- Airlift/Ridetech/AZ Air suspension with iPhone and key fob remote control
- Stasis ARB
- Eurocode Alu Kreuz
- Carbon fiber mirrors, front lip, valence, grill, fog covers, interior trim
- upgraded B&O w/ subwoofer/amp and high-end Hertz speakers
- AWE boost gauge
- RS6 flat-bottom steering wheel and shifter
- OEM Avant load securing system
- OEM From/Rear/Camera Park distance
- RS4 LED Tail lights
WAY too much to list!!!
More pics to follow.

*** Zero oil consumption issues, always garage kept, paint and front-end protected, no accidents***

In order to import this car from Ontario to Alberta (I've just moved) it just had to be thoroughly inspected and passed everything with flying colours....as expected.

I'm located in Calgary, AB and US buyers would have to import etc. but I trust you that this car is worth it.


List Date: 1/12/2016

For more info, click here to view the original listing: One of kind 2009 B8 A4 K04 bagged Avant with a RIDICULOUS amount of tasteful mods and only 35K miles



so unless i am wrong us guys that dont know anything are actually running faster on the street than corey ran on the track. Draggy is known to run .02 to .05 slower than a track timer. And you still have not pointed out a single b8 running under 12.8 and you have to go back to 2014 to find a b8 running that who also had lightweight forged wheels, full exhaust and a -500 DA. so yeah i will stick with playing with hp tuners as it keeps getting quicker and if i didnt have stock exhaust and ditched 20 inch stock wheels would probably already be in 12.7s or lower

4 consecutive runs on street with wheel spin, but yeah we are morons you are the only one that knows anything.

Mr Inferior B7 will probably yap some BS. I really hope no one reading these forums takes him seriously and I hope they don't listen to any "advice" he gives. Guy doesn't even own a B8.

[Shane Horning]

Mr Inferior B7 will probably yap some BS. I really hope no one reading these forums takes him seriously and I hope they don't listen to any "advice" he gives. Guy doesn't even own a B8.

Listen dude that guy helped me set up my waste gate a year ago when I 1st installed the k04. I agree he may stress his point a little to much but why can't you quit harassing him constantly and be helpful once??? I was taught if you have nothing nice to say dont say anything. Seems you could learn from that and be a respectful adult

[EvolutionArmory]

No Longer Available
One of kind 2009 B8 A4 K04 bagged Avant with a RIDICULOUS amount of tasteful mods and only 35K miles

A truly one of kind 2009 B8 Avant with under 57k KM (only 35k miles!), meticulously maintained/protected.....looks brand new. Since my move to Alberta I've purchased a third recreational vehicle and just don't use my Avant as much as it deserves. I'm hoping to find the right new home.

It started life out as a loaded Sport/Tech /NAV/B&O spec but things have changed...considerably ;)

Just SOME of the highlights.....
- completely upgraded to 3G Plus NAV
- K04 w/ APR tune (fastest pump fuel A4...12.8 second 1/4 miles)
- upgraded plugs, coil-packs
- APR exhaust, Carbonio intake
- Eurocode FMIC, inlet pipe, crank pulley
- GFB Diverter Valve
- 034 Motorsport Catch Can kit and Transmission mount
- BBG forged wheels plus another set of winters, all with Michelin tires
- Airlift/Ridetech/AZ Air suspension with iPhone and key fob remote control
- Stasis ARB
- Eurocode Alu Kreuz
- Carbon fiber mirrors, front lip, valence, grill, fog covers, interior trim
- upgraded B&O w/ subwoofer/amp and high-end Hertz speakers
- AWE boost gauge
- RS6 flat-bottom steering wheel and shifter
- OEM Avant load securing system
- OEM From/Rear/Camera Park distance
- RS4 LED Tail lights
WAY too much to list!!!
More pics to follow.

*** Zero oil consumption issues, always garage kept, paint and front-end protected, no accidents***

In order to import this car from Ontario to Alberta (I've just moved) it just had to be thoroughly inspected and passed everything with flying colours....as expected.

I'm located in Calgary, AB and US buyers would have to import etc. but I trust you that this car is worth it.


List Date: 1/12/2016

For more info, click here to view the original listing: One of kind 2009 B8 A4 K04 bagged Avant with a RIDICULOUS amount of tasteful mods and only 35K miles



so unless i am wrong us guys that dont know anything are actually running faster on the street than corey ran on the track. Draggy is known to run .02 to .05 slower than a track timer. And you still have not pointed out a single b8 running under 12.8 and you have to go back to 2014 to find a b8 running that who also had lightweight forged wheels, full exhaust and a -500 DA. so yeah i will stick with playing with hp tuners as it keeps getting quicker and if i didnt have stock exhaust and ditched 20 inch stock wheels would probably already be in 12.7s or lower

4 consecutive runs on street with wheel spin, but yeah we are morons you are the only one that knows anything.

Like I said before, it isn’t what you’re doing. It’s that you think what you’re doing is light years better and everyone that just bought a CTS or JHM turbo because as it sits right now, you average what an APR car did in 2014. And he got a 106 trap speed at one point. 106 is faster than than 104 and 105, right? Or did I fail at math too? And he did that with a bagged 2009 avant. Avant’s are heavy. Bag systems add weight. Thanks for adding that detail I didn’t know. I’m even more impressed with his time now.

Look, you guys are making forward progress with the HP Tuner kid in his garage but is it because his tuning skills are really good or is it because your first tune was pretty terrible.

And you keep saying my info is wrong when it isn’t. Shane, A4X and now Trap all do what I suggested and got good results because their tune works. Shit, A4X was the one who helped get my car running right. I guess I shouldn’t have listened to him 2 years ago because he has a B8?

Nano, do you know how stupid that sounds? Why can’t you understand that the same turbo on a similar engine with the same displacement will have similar results?


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[EvolutionArmory]

Listen dude that guy helped me set up my waste gate a year ago when I 1st installed the k04. I agree he may stress his point a little to much but why can't you quit harassing him constantly and be helpful once??? I was taught if you have nothing nice to say dont say anything. Seems you could learn from that and be a respectful adult

This is what I’m talking about. You did what I suggested and what I could prove and your car was faster. It worked.

And the reason why I keep going on about it is because what they try and recommend didn’t work yet they keep getting more people to jump off the cliff with them. Maybe that’s my fault for trying to help people that don’t realize they need it.

Really it’s my fault if I think about it


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[Traptalk]

Yeah it was me, it worked great

Did the valve springs end up solving your misfires ?

[Dpartinvr4]

Did the valve springs end up solving your misfires ?

Yes, but then the lifters became a problem, so they got ferea shims, should be good now

[Traptalk]

Like I said before, it isn’t what you’re doing. It’s that you think what you’re doing is light years better and everyone that just bought a CTS or JHM turbo because as it sits right now, you average what an APR car did in 2014. And he got a 106 trap speed at one point. 106 is faster than than 104 and 105, right? Or did I fail at math too? And he did that with a bagged 2009 avant. Avant’s are heavy. Bag systems add weight. Thanks for adding that detail I didn’t know. I’m even more impressed with his time now.

Look, you guys are making forward progress with the HP Tuner kid in his garage but is it because his tuning skills are really good or is it because your first tune was pretty terrible.

And you keep saying my info is wrong when it isn’t. Shane, A4X and now Trap all do what I suggested and got good results because their tune works. Shit, A4X was the one who helped get my car running right. I guess I shouldn’t have listened to him 2 years ago because he has a B8?

Nano, do you know how stupid that sounds? Why can’t you understand that the same turbo on a similar engine with the same displacement will have similar results?


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I don’t think we should knocking our only tangible path towards custom tuning.

Of course tuning software is only as powerful as the man behind the keyboard.

But I think the fact a few private guys with UNFINISHED BETA tunes are starting to match the big tuners and pushing towards surpassing them.

No body is asking anyone to follow them. When I switched to hpt I knew full well it was experimental.

It’s important to note the progress of where they stand with what’s available but the negativity and bashing isn’t needed.

If they end up tying the big name tuners in time, trap, and power I still wouldn’t say it’s a flop because we found out how to do independently of the big companies for a fraction of the price and then we made the information open source to the community for them to make their own decisions

What we’re doing here is a good thing for everyone

[Traptalk]

Yes, but then the lifters became a problem, so they got ferea shims, should be good now

Hopefully that works for you.

Sucks vast was trying to push the springs on me so hard and I almost did it without any real proof was the issue.

I know that the roller revision in 2012 had some interference problems with certain spring kits but that shouldn’t apply to you.

What other conditions happened during your misfires?

[schwiz23]

This is what I’m talking about. You did what I suggested and what I could prove and your car was faster. It worked.

And the reason why I keep going on about it is because what they try and recommend didn’t work yet they keep getting more people to jump off the cliff with them. Maybe that’s my fault for trying to help people that don’t realize they need it.

Really it’s my fault if I think about it


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What wastegate spring and crack pressure are you running?


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[Traptalk]

What wastegate spring and crack pressure are you running?


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You, mnripper, and I are the only ones with removable springs in their wastegates

[schwiz23]

You, mnripper, and I are the only ones with removable springs in their wastegates

What did you go with? I tried nudge it out of you but I think you wanted me to try my own setup, which is completely fine.

I should be able to produce more logs tonight. I found a leak where the lower charge pipe connects to the turbo. Repositioned the hoses and clamps and used a bit of hairspray for good measure.


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[Dpartinvr4]

Hopefully that works for you.

Sucks vast was trying to push the springs on me so hard and I almost did it without any real proof was the issue.

I know that the roller revision in 2012 had some interference problems with certain spring kits but that shouldn’t apply to you.

What other conditions happened during your misfires?

No the springs were still definitely the problem they 100% fixed my issue. My 2008 had the stupid b8 springs in it, the lifters only became a problem because I was revving to 7500 and they just couldn't keep up.

[Perry01]

I was taught if you have nothing nice to say dont say anything. Seems you could learn from that and be a respectful adult.

+1

[Perry01]

No the springs were still definitely the problem they 100% fixed my issue. My 2008 had the stupid b8 springs in it, the lifters only became a problem because I was revving to 7500 and they just couldn't keep up.

What valve springs did you use as a replacement?

[Dpartinvr4]

What valve springs did you use as a replacement?

Supertech, but I recently picked up a C&C ported head that has the IE beehive springs in it. Also I picked up all new lifters and rockers while I'm at it putting the shims in

[Perry01]

I don’t think we should knocking our only tangible path towards custom tuning.

Of course tuning software is only as powerful as the man behind the keyboard.

But I think the fact a few private guys with UNFINISHED BETA tunes are starting to match the big tuners and pushing towards surpassing them.

No body is asking anyone to follow them. When I switched to hpt I knew full well it was experimental.

It’s important to note the progress of where they stand with what’s available but the negativity and bashing isn’t needed.

If they end up tying the big name tuners in time, trap, and power I still wouldn’t say it’s a flop because we found out how to do independently of the big companies for a fraction of the price and then we made the information open source to the community for them to make their own decisions

What we’re doing here is a good thing for everyone

Tuning software of the big companies gives them a big advantage and makes their job easier. But they do employ people with college degrees in engineering to work the keyboards. Hats off to the little guys for breaking the barriers though. I hope they succeed in giving the big guys a run for their money. I’m sure being a beta tester for one of the little guys can be frustrating. You have to be patient and not expect instant results. I was fortunate enough to be at the right place at the right time for tuning needs and am very grateful.

[Traptalk]

No the springs were still definitely the problem they 100% fixed my issue. My 2008 had the stupid b8 springs in it, the lifters only became a problem because I was revving to 7500 and they just couldn't keep up.

With a k04r? Did you have boost at 7500rpm?

My first revision from vast felt really nice and smooth but I insisted we turn it up more and that’s when my issues started.

I still think they’re could of potential with their software the tcu tune was great but being so far away made it challenging and the lack of map switching in any form sucked for me because I really wanted to be able to use 93, 93 + meth, and ethanol and having that flexibility didn’t seem possible for me

I don’t blame them for any of the issues I faced tho

[Traptalk]

What did you go with? I tried nudge it out of you but I think you wanted me to try my own setup, which is completely fine.

I should be able to produce more logs tonight. I found a leak where the lower charge pipe connects to the turbo. Repositioned the hoses and clamps and used a bit of hairspray for good measure.


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Lol what? I’ve told you multiple times my exact set up inside and out and my crack pressure is even listed in my hardware list in the first post.

My crack is right around 10-11psi with the yellow spring with 10-11mm of total rod travel

[schwiz23]

Lol what? I’ve told you multiple times my exact set up inside and out and my crack pressure is even listed in my hardware list in the first post.

My crack is right around 10-11psi with the yellow spring with 10-11mm of total rod travel

I must have missed it, whoops! Thanks!


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[EvolutionArmory]

What wastegate spring and crack pressure are you running?


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OEM style fixed wastegate set to 9 PSI, CTS Turbo 1070 K04. I overboost quite a bit at spool so I need to back it down a little to maybe 8-8.5. I installed a manual boost controller in parallel to my N75 to cap boost at 22 PSI to tame the overboost but it still allows me to spool really fast. I reach full boost at 2600 RPM and the highest peak MAF I’ve been able to reach is 289 and I’m in the 280’s for the majority of 6-7K.

I’d say my turbo is pretty dialed in.

Is anyone else in this thread making 20 psi at 2600? I dip about 1 PSI in the middle but I think if I gave myself a turn or more of rod travel, it would fall in line. But I’m not overly concerned with 1 PSI in this temperature.
Attachment 208997

Attachment 208998

Attachment 208999


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[schwiz23]

OEM style fixed wastegate set to 9 PSI, CTS Turbo 1070 K04. I overboost quite a bit at spool so I need to back it down a little to maybe 8-8.5. I installed a manual boost controller in parallel to my N75 to cap boost at 22 PSI to tame the overboost but it still allows me to spool really fast. I reach full boost at 2600 RPM and the highest peak MAF I’ve been able to reach is 289 and I’m in the 280’s for the majority of 6-7K.

I’d say my turbo is pretty dialed in.


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I’d say so too. Thanks for the explanation and details. I appreciate it.


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[Dpartinvr4]

With a k04r? Did you have boost at 7500rpm?

My first revision from vast felt really nice and smooth but I insisted we turn it up more and that’s when my issues started.

I still think they’re could of potential with their software the tcu tune was great but being so far away made it challenging and the lack of map switching in any form sucked for me because I really wanted to be able to use 93, 93 + meth, and ethanol and having that flexibility didn’t seem possible for me

I don’t blame them for any of the issues I faced tho

With the 9 blade turbine 7+7 compressor I was at 17 psi at 7400, the turbine wheel helped a lot but the tiny exhaust housing is still the biggest restriction though, the Raised Revlimit south the k04 was honestly just to let me hold third gear through the beam in the quarter-mile. and I sat with mike at Vast while he was tuning my car that dude is a machine