NefMoto

I want to add more fuel beacuse my IDC is close to 100%
The cheapest and simplest solution is to fit a fuel filter with higher presure. Few days ago I was searcing on internet and I found a 5 bar fuel filter. And i could swear with my life i saw it.  Now it is imposible to find it  :o  only 6 and 4 bar is what I see now.  I think even I read somewhere on forum that tfsi use 5bar, but looks like that was a misinformation
Is there 5 bar fuel filter for returnless engine?

the latest TFSI revision is a 6.x bar filter, however, you might see your pump struggle to keep up in order to make that pressure at redline. There were some older revisions that were 5.x bar (5.7 I think) but whether they fit your returnless 1.8T or not, I have no idea.

The 20 valve derived 2.0 tfsi(ea113) uses 5 bar (to 3bar) fuel filter and pump, that might work,dunno.

Do you have number part?
6 bar is to much, 5.5or 5.7 if that is closest one is maximum that i will give a try

Nah my etka is broken atm, but look for an Audi A6 c6 2005 or so 2.0 tfsi fuel filter, you should find it.

Can you use online etka? I am not able to find it, only 4 and 6 bar

on this subject, whats the biggest FPR that I can get for the c5 rs6 and does anyone have a part number? I know I bought one for my b6 s4 but for the life of me cant find the part number anywhere. 2nd question if I upgrade the FPR will it assist with fueling or is that a waste of time?

I will give a shoot 6 bar filter. Bur my question is will that presure harm my injectors.
Even I doub't that stock fuel pump will flow 1500 cc/min at 6 bar

To answer my own question about the part number for the 5bar FPR its 078.133.534

Not sure about whether adding this will be a benefit or not? The rs6 runs out of fuel before boost with the stock turbos... not log tested yet but would prefer not to push the limits.

Today I tested my old fuel pump from A4 B5 1.8T and here are the numbers are
Maximum presure that pump can deliver is about 7 bar
At aprox 6.2 bar it can deliver 1200 cc/min
At 3.8 bar it delivers about 2300 cc/min
Testing is done at 10V, fuel pump surge about 5A. 

 Sooo, at 14V I think it will be able to deliver at least 1400 cc/min at 6 bar. and that is enought for me.
Is there a danger that injectors will fail at that presure?

Dont think so, however high prssure fpr will cause strain on the pump , it will fail way faster then oem.

I don't think a 5bar fpr is a good idea either, injectors will behave differently as well (more latency, etc).

I have really bad filing about puting 6 bar fpr.
I think it is better idea to find biger injectors
I have opportunity to buy S3 injectors, but they are different. Can these injectors work on my engine?

yes they do, the long nose is more suited  for small port afaik but it works on both.

I found that fuel injectors can hold up to 7 bar. The lifetime of fuel pump doesen't bother me. I run on LPG and fuel pump is off in that condition.
So i will give a shoot with 6 bar FPR
Question before I do that, what variables do I need to log on stock sistem, to make sure everthing is working alright.

7 bar absolute? The FPR is the pressure ABOVE the mani pressure. If you are running 2.5bar boost and a 5bar FPR, thats 7.5 bar.

B6 use non return sistem. So the more boost, less presure on injectors.
If I use 6 bar FPR, at idle the injectors will take about 6.8bat pressure.

But that what you mention in return sistem. The pressure on injectors is always same as FPR. I must draw that, beacuse I cant expalin it
The body on injector will must hold a 7.5 bar, but diference betwen lower and upper side of injector is same as FPR. If you look at inside componts of injector

Imagine that the arow is a presure from manifold 1.5bar , and from other side we have 7 BAR. The wall of this sheel ( wall of injector in our case) will have 7 BAR, but the ball( internal componets od injector) will only hold the differnece 7-1.5= 5.5 BAR. So the injector flow will be rateted at 5.5 bar

At the end i instaled fuel filter with 6BAR FPR.
Firs problem is that B7 fuel filter have 10 mm return valve hode, and B6 have 8 mm. So there is need to done some modifications. I use ruber hose to make that transtalion.
I started the car, and everthing was alright, then I try selveral times to squize return hose with my fingers, to check is there any pressure in it. That was  a huge mistake, becuse after i have sqiuzed the hose, my fuel pump start to make noise. It is still working but it make noise   :'(
To numbers

At idle i have 6.0 bar on fuel rail, testing at 13.2V and injectors full open, pressure drop to 5 bar
Fuel pump compust about 7 Apms

Do I recommend anyone to do this? NO... It is far more better idea to get bigger injectors. It is safer and at end it cost less

I am lucky beacuse i run my car on LPG, when I run on petrol, pump make noise and it is only a mather of time when it will fail. Not more safe car to drive on long trip

Here is a log with origianl 4 bar fpr vs 6 bar fpr

understood