Bobby Singh A4 3.0 TDI build thread

My car is a CCWA so comes with a CP4 hpfp they run 1800bar stock. I've changed it to a CP3 NOT CP1.
Your car has a CP1 which is R85
CP3 runs 1600bar stock and is a R90
Before changing your pump you should ask your tuner if he can tune it.
You will get starting and running issues if you just swap it over.

However, as I've said previously R85 is pretty big pump as stock and shouldn't need upgrading for a hybrid based 2260.
I strongly believe you has missed maps in the tune.
 
Is the r85 also enough for a bigger turbo like you have for example bobby?


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Right so which vehicle is this r90 fired to then ??

And yes we did miss maps in the tune at first but the tuner was confident he found them all in the end but I agree it may need looking at further in the tune .

I do not get codes now for low fuel pressure since I put a new fuel filter on the car but I do see actual fuel pressure dropping off as revs rise from demanded.

I am running 2000bar , on vagcom the values look like they go off scale mid range as the values turn to a hexadecimal rather than a number then over 3.5k it turns back to numbers again but actual is always lower than demanded
 
audi upgrades
Bro Performance - never tried

Nate - r90 also comes from the early v6 engine.

You'll get dtc when there is approx 300bar delta. Hex value is normal - just change the format in excel.

All cp4 cars run a high pressure feed pump.
 
that will help you then as you will have a higher head pressure at the hpfp inlet. i may need this . i think karl did this mod i will have to look at his thread to see what he did .

the 4.0L tdi has an R110 hpfp , i wonder if it will fit ?
 
Measure feed pressure I say.
But to be honest I've installed a CP3 on a 2.0 CR and that runs without feed pressure.
Im sure it'll fit but you'll need custom bracket.
What lambda do you have at 4k?
 
audi upgrades
i cant remember off hand it was a few months ago but its low as we dropped it out the way incase that was what limiting us on fuel when we were tuning the map .... it does smoke on WOT

what do you mean feed to the injectors or feed to the hpfp ??

i dont have a lift pump in my tank so it will 0 -> slight vacuum to the hpfp as its being sucked in not fed ..
 
If you are smoking you are out of air - it takes a lot to makes these smoke.
Would be good to do some logging as egt's I'm guessing will be high if you have smoke.

Maybe do a 4th gear WOT - if its below 900 you have a faulty sensor as 2k rail p is not enough.
Feed to the pump I meant.

CP4 car has 3 pumps - in tank, feed pump and hpfp.
 
it doesnt smoke bad , only slightly . but yes i agree it does need investigating

on the dyno egts were around 900c on the first sensor and 850 on the 2nd sensor which i thought was ok ? what do you think .

i dont have any equipemnt to read an edc17 atm else i would send you my file to look at
 
yes thats what i did . pre turbo egts .... i will log when i get home as i am away atm for a while working ..
 
Hello Bobby,
Got very similar setup.. ccwa, etc.. what are your thoughts on transmission behavior after tuning? Do you get half cluth'ish behavior sometimes after gear reduction?
How it handles the "lunch control" like starts on the quarter, etc?

Thanks for any comments!
Martin
 
Hi Martin I'm not sure I understand "half cluth'ish"?
I've taken off with 900nm from the start line without issue so far.
 
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Hey, Sory for this slang..

Case is when the gear reduces from e.g. 6 to 5... the car doesn't immediately engage.. there's like 1-2 seconds delay, which despite the throttle being at its 70%, keeps the rpms steady at ~3200 rpm and the boost is cut to 1bar, instead of 1.6 which is normally still on that rpms. After the delay you can feel the boost coming and the car going with regular torque/power for this throttle level.

This is what I call "half clutch" as I was also reading about it on other forums..

Do you experience something like that? On normal regular commuting? It happens to me like 1/10th gear reductions.. hard to log it also, but will try to see the gearbox lock, etc.

Thanks for any advice ;)
 
Is your car tuned? I know there is a torq limiter for the box but that shouldn't cause any issues on down shift.
Might be worth giving the gearbox a service.
Im yet to do mine
 
Hey, yes.. hybrid turbo + wagner IC.. 350PS 650NM.. so easy on the gearbox.. All the limiters are gone for the box, as the tuner stated, but.. not easy to find someone who can map/tune software of this box.. where do you service yours? in ZF or some 3rd party?
 
Cool, though I've changed the oil before tuning the car.
Is that possible the gearbox limiters can cut the boost for some reason? Did you remove any limiters on your setup while going to 900Nm?
 
Bobby, do you know how to connect to the tiptronic TCU so you can change the software (faster gearbox shifts, higher rpm shift...) or at least see what can be done and after that do this things ? Thank you!
 
marcinsz said:
Cool, though I've changed the oil before tuning the car.
Is that possible the gearbox limiters can cut the boost for some reason? Did you remove any limiters on your setup while going to 900Nm?
Click to expand...

You sure you experiencing boost reduction and not fuel reduction? if so then yes - You either increase or turn off

Horia said:
Bobby, do you know how to connect to the tiptronic TCU so you can change the software (faster gearbox shifts, higher rpm shift...) or at least see what can be done and after that do this things ? Thank you!
Click to expand...

I've put in a request for support in my tool - and no updates on this request so far.
 
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Honestly.. I just see actual boost on the BT... will connect laptop with full VCDS and check if it's fuel.. thanks.
 
the service kit you have tagged on ebay has the same service kit code that ZF sent me: 1084.298.013
 
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Thanks for last night Bobby

Sent from my ONE A2003 using Tapatalk
 
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Hello.
Bobby, could you share more information about your hpfp cp3? Is it 059 130 755 N?
I also have ccwa and think about cp3.
 
Any cp3 will do as long as its R90, but check with your tuner first if he can tune it correctly.
Unregulated feed pressure is 9bar if i recall correctly.
 
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So there is no need to lower the pressure like on a car with factory cp3? I took a pressure to an Audi with this hpfp and was 2bar... There will be no problem for the cp3 to have more then 2bar feed pressure?
 
Bobbies car is a CCWA so comes with a CP4 pump he has swapped to a CP3 pump. They are different in the way they work. If you were going from a CAPA CP1H to a CP3 I don't think you would have as many issue as they work in a similar way.
 
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I also have CCWA with cp4.2 and tiptronic. I bought a cp3 R90 and I need to know if i keep same pressure before hpfp aprox 8bar or I go to 2bar like on audi with oem cp3?
 
Hi Bobby, hope the car is still running strong. I noticed in a different topic you are running a bi-turbo maf. I'm just getting ready to get the stock turbo of my CAPA sent off for modifying into hybrid but wondered what part number maf you used?

Seems to me the 2013 A6/A7 CGQB bi-turbo maf part is: 059 906 461 q

Are you using that part as well?

Can this part be switched over by me on the stock map and then driving the car to the tuner? Or will this have to be installed and calibrated to by the tuner?
 
Correct part nunber iirc.
Should be fine as long as you don't give it death. Or Disconnect the map sensor and it will limp anyway.
Its a larger housing so will need a new TIP.
 
Awesome, thanks for letting me know. I really appreciate it. Is the stock map sensor good enough for about 370-380bhp you reckon?

I've got the bi-turbo TIP so should connect up fine.
 
April/March 2017

Not much to report - but I've covered approx 25k on the S200 without issues.
Done a service and changed the gearbox oil

Gearbox service kit

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Even though ZF give you 7 litres of oil I could only get in approx 4.2litre which was about the same I took out so have plenty left over.


In other news managed to source another S200 :)

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Bi turbo :) . I am liking it. Or are you going to have this converted to a mahoosive hybrid ?. Now the gearbox has some fresh oil in is it ready for an extra dose of torque. 1000Nm would be nice wouldn't it :) .
 
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You are right - 1000nm would be a nice statement - lets see ;)
The current unit has more to offer to be honest in the top but I'm keeping egt's safe.
I will experiment soon with more fueling mod's to bring egt's down and fit the 3" exhaust back for testing.

The gear oil was clean considering its never been changed.

Also need to source better brakes - S4 ones are fine for short periods but they just get too hot for prolong use.
 
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Have a look at my build thread. There is limited airflow to the brakes . Some TTRS wheel well vents and Porsche Macan ducts and remove a lot of the brake backing plate so the cool air can get to the disc.
Modify the front fog grilles with some mesh to allow air to get through.
Bigger discs and calipers will delay the onset of issues but at the end of the day there is still no cooling to speak of on the brakes.
Only the RS cars get brake cooling ducts.
 
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