Stage 3- (K04 with stock fueling)

[EddieS4]

I am very close to installing this on my S4 (2001.5 with 90k miles)

But I have heard so many different/conflicting things about this setup, I was wondering if someone who is actually running it can give me their .02 cents

I want to go with K04's since everyone is blasting the hybrids, but I cant afford to upgrade the entire fuel system. Whats the solution?

(BTW I tried searching, but the site wont let me search "stage 3-")

[2001S4CT]

I am very close to installing this on my S4 (2001.5 with 90k miles)

But I have heard so many different/conflicting things about this setup, I was wondering if someone who is actually running it can give me their .02 cents

I want to go with K04's since everyone is blasting the hybrids, but I cant afford to upgrade the entire fuel system. Whats the solution?

(BTW I tried searching, but the site wont let me search "stage 3-")

What do you want to know bro? Be more specific

[SilverSurferS4]

Yes all you need is k04's, inlets and hardware... with stock ecu, it will run like a stock s4.
If you want get ko4's, inlets, hardware, stage 3- ecu reflash, and a 5bar fuel pressure regulator, and you will have stage 3-.... then you can save up for a full stage 3+ fueling kit.

[BurnAll4S4]

dude. bullshit you tried searching. theres a thread on the same topic every 2 weeks.

yes you can do it. yes its fine.

[AudiSportB5S4]

i have it for the time being, and it runs very nicely. if you want i can post a dyno sheet on *mustang* dyno made 287 wheel horse and 336 wheel torque. this is off of VAST's tune.

[EddieS4]

SO there is no danger of running too lean with K04's, inlets, and stock everything else? Aside from better quality/realiabilty any perfomance gains on this setup vs stg 2?


I did try searching. Type in Stage 3- on the search field and see what happens

[casawhites4]

just look up anything else man, its talked about all the time...goodness these are easy questions...i hate this part, lol...
no danger in runnin k04s with stock fueling...
stage 3- (ko4's, 5bar fpr, inlets, ecu)
or you could go with this set-up
k04's, 5 bar, inlets, x-chip with tcd and mbc...(you can find the x-chip for cheap nowadays) homebrew stage 3-

[nvrfollow]

Your going to want to flash your car with stage 3- software and put the 5 bar fpr on before you drive it with K04's, that is if your car is already chipped. Dunno about other software but I do believe the GIAC stage 2 software runs higher boost than stage 3- does. It might be harmful to your the new turbos if you don't.

[AudiSportB5S4]

check your PM's eddies4

[ME7 Tuner]

It really depends on how your specific hardware/software reacts to the K04s. Take a look here:

http://audizine.com/forum/showthread.php?t=173412

That's an S4 with stock fueling and K04s and as you can see from his dyno chart, his car is pretty damn lean.

You won't be able to tell how your car is reacting to the K04s unless you data log it or put it on the dyno with the wideband in the tailpipe.

[Das General]

I ran a PJ Giac X program that you find on your average stage 1 or stage 2 s4, with my K04's.

Worked fine, made 310/335 to the wheels.

[ahwest]

deb38, are you running just the K04s, 5bar FPR, and the GIAC-X file? no MBC and TCD ?

[Das General]

no 5bar fpr....stock 4bar. *cough*

i ran no tcd, no mbc and a plain old giac file.

btw i made 310/335 with only 14-15psi and stock intercoolers

[hyperlight944]

hahah make sure if your a stage 2 now or even stage 1 you get it reflashed with stage 3 minus before any hard driving .... and i mean any! ....i say this because i had to wait for my chip because some complications but they logged my car and found out i was spiking to 31psi on pj k04's sooo yea dont hammer it untll its flashed and ......you run i believe 15 psi to redline on the k04's w/o the fueling with stage 3 minus flash plus a 5 bar fpr

[Das General]

I went WOT a fair amount without a 3- toon.

No flash for me.

[ahwest]

deb38, how does that happen? did you do any tweaks to the car?

[The_Jerbel]

You just may run lean up top without the FPR, that's all. Obviously worked for him

[AudiSportB5S4]

the fuel pressure regulator is really just the stock one crushed to a "4.9bar". thats what i run, i didnt pay over 200 for a true bosch 5 bar. and my A/F ratio was almost spot on through whole powerband when i dynoed

[Das General]

There were no tweaks done to the car.

When I get back to philly I can look at the logs, my car was dyno'd with a wideband so I can tell you what the air fuel was at. I can tell you it wasn't dangerous enough to cause any alarm. So I wasn't running that lean.

[Daft]

dude. bullshit you tried searching. theres a thread on the same topic every 2 weeks.

yes you can do it. yes its fine.

Whoa......hang on a second.

K04s + inlets + stock ECU = Throttle Cut City.

Trust me, I've been driving this way since December of last year. I'm lucky if the ECU lets me have 60% throttle.

The fuel maps are horrible too. I will see O2 voltages in the mid-high 0.70's under WOT. Therefore, I stay out of the throttle almost all the time.

I do NOT recommend using stock programming with K04s. Lemmiwinks will not cut it either. I played with primary fuel and SEL scaling to help the O2 values. I took it all the way to the point of CELs on primary fuel tweaks and I only peaked at 0.82V.

You need at least a stage 1 chip for K04s to run safely. Even then, you still will need Lemmiwinks to adjust timing and fuel to make it ideal.

[The_Jerbel]

^^Very true. An MBC is beneficial to cap possible boost/lean spikes as well.

[Das General]

Yeah a lot of people have issues with serious spiking, that was not the case for me. I was hitting a max of 15 psi

[nizmosx]

Well if you want to try the home brew thing. i have a some 42lb injectors, an itg open element filter, and possibly a walbro fuel pump you can buy. all you would need is a vast housing, tcd/mbc and stage 2 giac sauce and you will be in good shape. let me know if interested in any of the parts i have laying around.

[lrg8683]

when i get my k04's in im going to turn down the boost until i have fueling.. ill go from about 18 to 15-16 and it "should" be ok until i can get fueling installed.

[slammed_nogaro]

the s4 is a pretty smart car id say.. my maf doesn't work and neither do my o2's haha and im on 21psi with stock injectors with ko4's and stock intercoolers and still ran a 4.1 fats on a 78ish degree night....even tho it tried to go into limp mode but couldn't bc i was mbc only :)... so i'd just get ko4s and inlets bc thats you biggest $$$$$$$$ then worry........... i'm also on stg1 giac flash

[EV'S Audis4]

Hey I have a similar situation I have ano s4 b5 with giac stage 2 that ran with k03s I upgraded to k04s diverder valves Dps 3inch catback but still have stock fueling, can I drive the car how will it behave.