A slow ass 400 CHP project thread

[AudiB720TS]

Buy a spare PCV breather tube and remove the tube so you only have the connector. Cap the end and boom, you have a PCV block off cap.

This is on the turbo side, right?

[EvolutionArmory]

This is on the turbo side, right?

No. The plastic breather tube that goes from the intake manifold to the PCV valve. Buy a spare, carefully remove the plastic tube from the cap and block off the end with a rubber cap and hose clamp.

Use it to cap off the intake manifold.

[AudiB720TS]

Ah, I think you mean the connection to the IM that is already capped off with my catch can setup (click to enlarge):

PCVcap.JPG

[EvolutionArmory]

Yes. If that port is already capped off, you’re golden.

When you pressurize your intake, you only need to get it up to like 5 psi. No need to pressurize it to like 20.

[AudiB720TS]

STATUS:

Boost leak test
I have now got my "boost leak" tester set up. I actually started the air compressor in the living room yesterday to make sure everything worked. That was a great call because it turned out the air compressor was dead from factory (gotta love Chinese "QC").
Took it back to the store and got it replaced with a working unit. Man, these things are loud!!! It states 91dB but it's probably 1.5 times that (gotta love Chinese feature statements and conformity claims)...

Anyways, I am holding off on the test until my new Diverter Valve arrives as I want to boost leak test with the car on jacks and change the DV and its connector at the same time. This is because my garage is really tight on space and I need to use bottle jacks in sequence (first small jack then a larger jack once it has clearance) and it takes about an hour to get the car in the air.

Replacement K03
Since I don't want to lose more time than necessary, assuming the leak test and the DV replacement leaves no other conclusion than a bad turbo, I have gone ahead and ordered a used K03 (on manifold) as well. Now since the "new" K03 has some mileage on it as well I am doing some risk mitigation here by also ordering K03 rebuild kit. It's a bunch of money to get these extra parts in, but I expect to get it back when either passing that turbo on or fixing mine and selling it. Oh, and I also ordered new gaskets for manifold and turbo.

FMIC
It inevitably feels like I'm sidetracked into a maintenance project here. I want to show, to myself, that I am committed towards those 300 AHWP. At the same time the Swedish currency is now one of the worlds worst performing currencies so imports are more expensive than ever. I expect the decline to continue so in a sense I should buy now. Another factor is "Brexit" and whether or not that will bring tariffs on European trade. The FMIC I want is UK sourced so I am thinking I should buy that first, and soon.

The kit is offered in all black or unpainted "silver". I am currently thinking of ordering the black core [without logotype sprayed on], black pipes and black silicone couplers because it will be easier to pass visual inspections. On the other hand I figure that if there's any issue with the piping or sensor fitment that needs fixing, its gonna be a lot harder to fix that on a painted pipe. The brand is called Airtec which is very popular with Focus RS and ST owners in Europe and the great thing is it includes a custom crash bar.


Airtec intercooler kit for the B7 A4.

[tloft4]

just fling all side money into crypto, that way you dont need forex to tank to be poor; it does it itself!

[AudiB720TS]

just fling all side money into crypto, that way you dont need forex to tank to be poor; it does it itself!

I assume you mean crypto currency. I think for most coins, especially those not resistant to quantum, the gold rush is over. I would short sell on Bitcoin if I could ;)

[Charles.waite]

just fling all side money into crypto, that way you dont need forex to tank to be poor; it does it itself!

Hahahahaha. So true though. *looks at Binance balance and sheds a tear*

[AudiB720TS]

No FMIC for now: the JHM labour day sale came up and so I bought the Golf R injectors instead

[vvenom800tt]

No FMIC for now: the JHM labour day sale came up and so I bought the Golf R injectors instead

What was the price?

Sent from my SM-G960U using Audizine mobile app

[AudiB720TS]

What was the price?

Sent from my SM-G960U using Audizine mobile app

403 $ or something like that, shipped.

Of course I have to add shipping and customs to Europe but I’ll control that somewhat through a freight forwarder.

[vvenom800tt]

403 $ or something like that, shipped.

Of course I have to add shipping and customs to Europe but I’ll control that somewhat through a freight forwarder.

That's not bad though.

Sent from my SM-G960U using Audizine mobile app

[tloft4]

I assume you mean crypto currency. I think for most coins, especially those not resistant to quantum, the gold rush is over. I would short sell on Bitcoin if I could ;)

you can. pm me if youre serious, lots of sites offer shorting with leverage

Hahahahaha. So true though. *looks at Binance balance and sheds a tear*

yeahhh :( my friend that got me into it is down about 10 lambos this year. managed to salvage a bunch between shorting and icos but the rush def boosted those too

ok back to your thread!

[AudiB720TS]

you can. pm me if youre serious, lots of sites offer shorting with leverage

Thanks for the offer. I’m gonna recheck what I can do from here, locally. In the process of changing banks so I’ll add this to the list of things I’d like to do. My current broken only lets me short specific stock, not at my choosing.

[AudiB720TS]

Today I finally managed to snap some shots of the car interior. I'm guessing this is a fairly rare interior, but I really don't know...


Rear door with curtains.


'cockpit' with leather/suede sports seats and aluminium trim.


Glove compartment with CD changer and refrigerator.


Front door card, with BOSE speaker.

[esandes]

Beautiful. I thought my b7 was fully loaded.

[Charles.waite]

I’m always jealous of you Europeans and your sport seats. I’ll never know why Audi refused to bring them to the US...

[al3k]

If your looking for a k04, Im might be in the same boat as you, been looking at JHM k04-r and BBT K430. I have owned a Spulen K04-064 before and liked it a lot but a hybrid k04 with more tophend is what I would go for.
Maybe we could get a small discount if we "group" buy something together?
Im thinking about going away from the EFR6758 setup to keep a stock look as Im also have to pass strict inspections every 2. year and its just too much building the car back and forth everytime, (done it 3 times allready).
I also want faster spool than the EFR6758, and a hybrid k04 seems to be going strong with 20-22psi right before 3000rpm. and can still max out the stock internals of the motor.

[EvolutionArmory]

Trying to get top end power out of a K04 isn’t worthwhile. It’s not what it does. You can dick around with clipping wheels or hybrids but if you’re looking for more top end power, the K04 is the wrong choice. It just can’t sustain that much boost up top due to housing and wheel size. It’s going to taper no matter what you do to it.

A K04 will have full spool at 2800 or so and hold boost strong to 5500-6K but that’s all it’s got. 6K to redline will fall fast. I think I’m holding 15 PSI at readline. Peak is 22-24.

[al3k]

Trying to get top end power out of a K04 isn’t worthwhile. It’s not what it does. You can dick around with clipping wheels or hybrids but if you’re looking for more top end power, the K04 is the wrong choice. It just can’t sustain that much boost up top due to housing and wheel size. It’s going to taper no matter what you do to it.

A K04 will have full spool at 2800 or so and hold boost strong to 5500-6K but that’s all it’s got. 6K to redline will fall fast. I think I’m holding 15 PSI at readline. Peak is 22-24.

Thats same results I got with a oem S3 k04-64, a hybrid k04 should be able to do over 20psi at redline, but I do agree power falls near redline, you can easily tell by the falling torque curve. But a OEM S3 k04 does very easily surge above 22psi and I would prefer a k04 hybrid over a stock k04 as you can still reach upto 400bhp++ while stock k04 is more like 318bhp with pump gas.
But the JHM hybrid k04-R Im not so sure whats going on there, it seems to perform like the Frankenturbo F23 turbo and not like other hybrids like TTE420 or BBT K430..

[EvolutionArmory]

Trust me, you aren't coming anywhere near 400 HP with JHM's or anyone else K04/hybrid. It just isn't happening with the restraints the housing and wheel place on the turbo. And you aren't sustaining that much boost either. It's a physical improbability.

If you can find one boost log online showing a B7 A4 K04 car holding 20PSI at redline, I'll be amazed.

[al3k]

Trust me, you aren't coming anywhere near 400 HP with JHM's or anyone else K04/hybrid. It just isn't happening with the restraints the housing and wheel place on the turbo. And you aren't sustaining that much boost either. It's a physical improbability.

If you can find one boost log online showing a B7 A4 K04 car holding 20PSI at redline, I'll be amazed.

I havnt seen almost anyone running k04 hybrid, only a few JHM k04-R, most others have run k03 hybrids on this platform, but there is a lot of dyno charts from S3/golf platform using TTE420, TTE480 and maybe others aswell.
Most K04 hybrid "kit" and also OEM k04-64 is only made to be a direct fit to the Transverse 2.0tfsi engine, doesnt seem to be a lot of development going on for the B7 anymore.

[Charles.waite]

There is some new stuff, but only because the same turbos will also fit the b8 platform so we might get some sloppy seconds as those cars get older and more modded.

[i3oricua]

Trust me, you aren't coming anywhere near 400 HP with JHM's or anyone else K04/hybrid. It just isn't happening with the restraints the housing and wheel place on the turbo. And you aren't sustaining that much boost either. It's a physical improbability.

If you can find one boost log online showing a B7 A4 K04 car holding 20PSI at redline, I'll be amazed.

There are K-04 hybrids pushing 400+ hp. You won’t see many, maybe any in the US but they’re all the rage here in Europe.


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[EvolutionArmory]

There are K-04 hybrids pushing 400+ hp. You won’t see many, maybe any in the US but they’re all the rage here in Europe.


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Now show me one that actually delivers on the claim, what are the specs and how reliable are they? And I mean on a B7 A4 FSI motor. EA888 TSI and TFSI motors don’t count. Much easier to get more power on MK6 VW’s and B8 A4’s.

And is that on E85 or what other bolt ons are used?

[i3oricua]

Now show me one that actually delivers on the claim, what are the specs and how reliable are they? And I mean on a B7 A4 FSI motor.

And is that on E85 or what other bolt ons are used?

E-85 is almost non existent over here. When people see me running meth they think it’s black magic.

I’m not gonna keep trying to convince you or anyone else. Nor am I gonna jump through hoops to find dyno proof or any other. I know these exist. I’ve seen them running Revo software and custom software. Seen them at shows and at the track. You guys keep sticking to JHM or whoever. I jumped that ship a long time ago.

I’ll keep tuning in to watch the progress of the build.


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[Charles.waite]

I would buy 350, but 400 is quite a tall order even for a TFSI EA888.

I wouldn’t say it’s not possible but I’d bet you would need a ton more than just a k04 to get there (meth, e85, build head for higher revs, etc).

[Charles.waite]

I would buy 350, but 400 is quite a tall order even for a TFSI EA888.

I wouldn’t say it’s not possible but I’d bet you would need a ton more than just a k04 to get there (meth, e85, build head for higher revs, etc).

This guy has a b8 with a cts k04 and APR 100oct tune with meth:



That’s 400 crank, if we’re being generous, with supporting mods on a b8. I just don’t see an FSI getting there on a stock k04 at all. Maybe a hybrid like one under discussion here could hit that but it would compromise spool and area under the curve in order hit the higher peak number.

I will however eat some humble pie, I didn’t realize the k04s could quite punch that high, so maybe 400 crank is doable.

Frankly, for all the effort it takes to wring out that much power from a k04, I’d prefer to just throw a GTX or EFR in and not run some tiny turbo to the ragged edge trying to get it to do something it’s not really supposed to do. Garret makes turbos that are just as reliable as a k03/4 in daily driving so as long as you can source a manifold I don’t see why people expend so much energy/money in k04 setups.

[EvolutionArmory]

That’s what I’m saying. It’s easy to say it is possible. The engine, turbo and fueling just can’t support it.

[tloft4]

and area under the curve in order hit the higher peak number.

as if 3 years of calc nightmares werent enough...

[AudiB720TS]

I will probably leave turbo choice until last and get injectors (on order from JHM) and intercooler first.
Might even do a few mods to reduce parasitic losses on engine / drivetrain first too.
That said, it seems unlikely to be able to get 300 AWHP on the K04 so I must either look for another turbo or revise my goals.

I'll keep an eye on BBT, but I'd like to see some prober dyno sheets for our cars and I'd like to see them (him) be more dependable (can't have pricing that fluctuates like at the fish market, can't go back and forth on core requirements and so on).

[EvolutionArmory]

There is no K03s for a B7. That’s a 1.8T thing.

If your car has 220HP it probably has a BUL engine code and your extra power comers from tuning.

[EvolutionArmory]

Just some advice for you.

Plan out what you want to do and don’t settle for less. If I were you I wouldn’t buy anything until you have 2 things figured out first. What turbo you’re going to use and who’s going to tune it.

There’s no point in buying S3 injectors if the tune you’re going to use wasnts RS4’s. Iron out your plan and make it happen.

[AudiB720TS]

There is no K03s for a B7. That’s a 1.8T thing.
If your car has 220HP it probably has a BUL engine code and your extra power comers from tuning.

I removed that part of my post, but I guess you saw it over email(?) After some googling I concluded any K03 after year 2000 would be "s" or equivalent. K03-052 and K03-053 would be 's' according to some old European posts I found.
The replacement I am getting says "K03-53XXXX" on it so assume that's the same thing (as K03-053). But yeah, let's conclude it only a tuning change.

Just some advice for you.

Plan out what you want to do and don’t settle for less. If I were you I wouldn’t buy anything until you have 2 things figured out first. What turbo you’re going to use and who’s going to tune it.

There’s no point in buying S3 injectors if the tune you’re going to use wasnts RS4’s. Iron out your plan and make it happen.

Generally I would agree, but I am thinking that I am sourcing these parts leaving space for growth: According to ECS, the S3/Golf R injectors can support 500 horse. The Airtec FMIC should be good for 400+ too. I aim at 300 and I should be fine.

For tuning I am using the guys that tuned this UBER car below ;) Stertman Motorsports. They're local, just an hour's drive. They sell both S3, RS4 and RS5 injectors for the B7 A4 and they customize all tunes to the customer vehicle.
Granted they only list stage 1, 2, and 2+ tunes for the B7 I will call them up again tomorrow to make sure they would work out a stage 3 fully custom for me.

https://www.youtube.com/watch?v=C0-gUXEkBoo

[klrider44]

S3 injectors will get you to your 300whp goal. After upgrading the high pressure fuel pump, the next bottle neck will be the low pressure side of things. Depending on what your tuner does you may need an upgraded low pressure pump and controller. After that then your S3 injectors will become the issue, but most likely not until around the 400-450whp range.


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[al3k]

Get a RS4 LPFP controller or a Torqbyte_ j538x module + PM3 driver, just get rid of that A4 LPFP controller because thats the most limiting thing on the LP side.

[EvolutionArmory]

Get a RS4 LPFP controller or a Torqbyte_ j538x module + PM3 driver, just get rid of that A4 LPFP controller because thats the most limiting thing on the LP side.

You don’t think that messing with the LP side is a waste of time when his HP goals are within the limits of the stock pump and controller?

It just seems like that money would be better used on a better turbo. Do you agree? When I was planning my K04 purchase I asked JHM several times if upgrading the low side was necessary. Had the CC out and everything. Every time I’d ask they said it wasn’t really necessary for either of their kits on pump gas. Only if I was going to run 100 octane a lot.

Sure, upgrading the controller will bring duty cycle down which I don’t think could ever be a bad thing but I think it’s not really necessary for most guys making 300 WHP or under.

[EvolutionArmory]

The reason why I said you should wait on buying supporting mods until you have your turbo and tuner worked out is not due to the amount of fuel S3 injectors can flow. The reason I suggested it is because most tuners write their software for either RS4 injectors or S3. If you already have S3 injectors and your tuner of choice prefers to write the tune for RS4’s, you just shot yourself in the foot and now have to source the right injectors or you just made it so you can’t run the tune you like.

That’s why I suggested you get the turbo and tune sorted out first. The supporting mods should be chosen based off of those 2 decisions. Make a plan first and then buy what you need to make the goal happen.

I’m just trying to make sure you don’t have delays you might not have thought of, especially having to import most things.

[AudiB720TS]

I’m just trying to make sure you don’t have delays you might not have thought of, especially having to import most things.

Thanks, appreciate that.

I checked with the tuner today and they confirm they can map for S3 injectors etc. Was good to clarify that.

Can anyone tell me, if I want to swap the K03 for a replacement K03 without dropping the cat, is that doable? Would it be simple or near impossible (given lack of access etc.)?
I am reasoning there might be a chance I pass emissions tests just by getting a better sealing turbo as opposed to replacing both turbo and HFC. Maybe it's worth a try.

Other than that, the parts I am waiting for are stuck in Germany/the UK. eBay's global shipping service is just horrible.

[EvolutionArmory]

You can pull the turbo out without taking the cat or downpipe out of the car but I wouldn’t recommend it. Moving it around to get clearance will put strain on the flex pipe section.