NefMoto

I'm trying to get working right Audi RS4 4.2 injectors in 2.0TFSI with GT30 ,but  how to can calculate KRKTE ?

regards

krkAte calculation is the same than ME7 but I don't think theRS4 injectors are bigger

RS4 BNS ~1093cc/min @100bar
S3 CDLA ~1202cc/min @100bar

thanks for your information. I explain bad , the injectors are going to get are these APR  .

http://www.goapr.com/products/injectors_bosch_hdev_1.html

pretty sure that's wrong... judging by everything ive heard

Maybe it's wrong, but where is the mistake in my calculation:

Qstat [cc/min] = (69,81 * Vh_zyl [dmˆ3] ) / KRKATE

The OP never said anything about S3 injectors, did he?

not that info, that s3 are bigger. i havent tested myself, but i guess at normal pressures the rs4 flow more

this is the problem I have now, to put the fuel injectors RS4 and fuel Trym tells me that the system is too rich , -6.6 and -18 ago on channel 32 .

What's the part number of your injectors?

the part number is delete for APR  :-\   

 krkte is now  -13% from orig and chanel 32 is  -6,6  /  -17  I understand nothing .
i have A2L MED9.1 but not find TVUB ,I'm blind or these inyectors not have this voltage map .?

regards

That is right but AXX injectors have ~1039cc @ 100bar and it would not make sense to swap them for RS4 injectors.

If you are using BDM you may have to delete old adaption.

There is no TVUB in MED9, I guess because injectors are not wired to UB.

i used CMD flash and delete all errors , but he fast is in -6  -10  .. >:(   .
it  is interesting to know new injectors flow  for made fine regulation .

thanks

RS4 injectors is aprox 13% bigger than S3 injectors. I have few cars with this mods.

me too I have done many TFSi with RS4s.

It is not needed only the KRKATE for correct calibrating the RS4 but you have to set correctly the injectors lag and you have to fine tune
the injection angle elsewhere you will have a diesel style car (black smoke from the tail pipe)

yes , this is correct

Answer the question why VAG installed that big injectors in an engine with a cyl of 55hp? The answer is the solution for calibrating the RS4s

Injection window is smaller.

I am  working now in KFWBHO1SLE map , the car improved a lot and the black smoke disappears, but I'm beginning to think that these injectors are not correct for this engine , I'm on the right direction?.

thanks

Of course they're not right for the engine. The rs4 spray pattern is completely wrong.

(http://awe-tuning.com/media/products/awe/mk5_k04/fueling/FSI_injectors_comparo.jpg)

However works completely fine if you know how to calibrate them appropriately.   

So you can get a smooth warmup idle on rs4s with no soot?

Not doubting you, but it seems like you'd be flooded with work if that were the case.

Its not exactly hard if you understand the ECU, how ever it is impossible to do by just changing maps.

Yes, and yes i am flooded with work :D


there are a handful of tuners that have these mapped correctly, i guess you are from the states and are stuck with only a few tuners that may not quite have it totally refined yet.

You need more than 10maps to calibrate them correctly. No black smoke, no cold start issues!
If you know the MED9 logic and the DI model and if you have read the blue Bosch book about DI engines then you are ready to calibrate them correctly.

It is not always right to try finding maps but you miss the theory!

cheers,
Fotis

There's something I do not understand. I have RS4 krkte data and using soft Fotis RS4 injectors up to 2345 cc / 100bar someone can say if this is correct???

KRKATE from RS4 4.2 should be ~0,03322

BTW
cylinder displacement is 0,520375

KRKTE 0.03322  i have in S5 4.2 354ps  but in 420ps have 0.016 same engine but same inyectors ??

post original file

here orig file.

KRKATE 0x1D9BC8 ~0,03322  ???

Ups . Ok , thanks , my damos adress is not fine .  ;)

KRKATE for RS4 in 2.0TFSi engine = 0.02361ms/%

I give you this also as the gift. Setting this value you will work fine but you will face
Cold start problems due to wrong injectors lag
Black smoke from tail pipe due to wrong injection angle

Recalibrate injectors lag
Recalibrate injection angle
Recalibrate injection pulsation correction map (final injection correction map) - Used for fine tune everything

This is it and you are 99% ready to without almost any diesel style exhaust gases!

A minor change for cold start in cold mornings lower than 10*C (if you want to be the perfect one)


bigger MAF housing should be 101% perfect calibrate it. If it is your first time, you can put the Stock air box in the engine

cheers,
Fotis

I would like to read the "blue bosch book". Any idea where I can find a copy?

I got it from ebay 4 years ago.

If you get this book, the job is easier to understand how to recalibrate the injectors.


Unfortunately it is 2013 and many people are still lost in the maps without knowledge about how a Direct Injection system works etc

This blue bosch book is a must for any tuner working on Motronics!

Thanks fotis . I are all week working in this and now car is fine . I test for perfect calibrate inyectors and maf .KRKTE is no problem now .  ;)

Hi,

I was looking through the RS4 file that is attached in here, to compare the Injection Angles.
But since I have no Damos file for RS4. Could someone confirm following things ?

Start adress 1D9699 and second table 1D9737
8x20 table in 8 bit
Factor  0.75 x Eprom +240

I have not found any axis yet. Should be the RPM / Air Intake Mass I guess ? Can anyone point me out the aproximate (or exact) location of the axes ?

As far as I can see now, Injection start angle is quite a bit lower on RS4 than it is on TFSI. (300 iso 310 at low rpm, 360-370 iso 420 at high rpm) and Closing angle difference is way more pronounced. 120° iso 50° at high rpm.

As I haven't tried. Concerning the Flap removal. Do you just check which diagnostics are run (item after LBKSOL in FR) and set them accordingly in order to remove Flap Runner faults and the Check engine light ? Will  removing the codewords on its own cure the bad coldstarts ? or is more needed ?

Thanks for pointing me in the right direction.

Does anyone can write the right formula to calculate the KRKATE for TFSI ? :)

Thank you very much

As I wrote you on the other post here the link to download the nice excel file made by Fotis.

http://nefariousmotorsports.com/forum/index.php?action=dlattach;topic=11627.0;attach=23411

Hello,

I have Golf MKV 2.0TFSI with gt30 setup
Just recently I installed RS4 injectors ,RS4 PRV and an Autotec HPFP
KRKATE set to 0.02361ms/%
Required maps set for cold start,no cold start issues
But car is running really rich i see LTFT around -18 %
where i do wrong ?

Thanks in advance

what maf size you use ?FKKVS is oem ?

I'd like to know the name of these maps ... can anyone tell me please?

The 3rd should be FKKVS , but the 1st and 2nd? KFBHO.... ?

For now MAF housing 70mm and FKKVS is OEM

Interestingly enough, LTFT is around %2  when using s3 injectors with OEM MAF (KRKATE 0.029)
 

 

Any suggestion ?

lower more krkte or lower pressure target to hpfp maps from 50bar to 30bar at idle .

Hpfp target is 30bar at idle. FKKVS reduced ~%20 but LTFT still part -16 / idle -6
Really strange

Hi all,

Now part load trim a little good with KRKATE But idle is still rich, any idea about idle ?

BTW if who can help me ,i am ready to pay for a perfect injector scale

Checked against DAMOS and address confirmed at 1D9BC8

Here's the map pack for that area if that helps

no response yet at this question :D

1) Recalibrate injectors lag
2) Recalibrate injection angle
3) Recalibrate injection pulsation correction map (final injection correction map) - Used for fine tune everything

2) Maps  usually are KFWBHO1SLE-MX-WE (initial angles)
3) Should be FKKVS
1) But the first one ? Which one is injectors lag?  and which other maps are needed to check ?  ???

Ok so the RS4 injector is about 29% lager than the stock injector for 2.0tfsi BWA?

has anyone done AKS tuning injectors for the ea113 drop in high flow. i got KRKATE set to 0.024792

they say there injectors are 85 ML @ 5 bars for 15 seconds