Audi TT RS - Aquamist HFS-4 questions
 

Hi,

I have an Audi TT RS stage II (Revo Stage II, Forge IC, turbo back completely decated, ITG intake) currently running about 430~450 bhp (at the flywheel).
I just purchased the Aquamist HFS-4 and I plan to install it these days, but I have a few questions:

1) What nozzles should I use?... as I could not find any info about the TT RS injectors flow rates? I was thinking of using 2 nozzles: 0.8mm + 0.9mm (or 0.8mm + 0.5mm)
2) Nozzles positions: the smaller one after the IC and the bigger one just before the Throttle body. Is this ok?
3) I will use 3 different maps:
- One with lower boost and timing for when WMI is deactivated
- One for using only water
- One for using water/meth 50/50

Can I use the safe function that "cut's" boost only when the WMI is activated and when the WMI is off to not cut the boost?
For example, on the first map (which runs without wmi) I don't need the system to cut the boost. On the last map (tuned for wmi) I need it to cut the boost in case that any problem will rise (of course if the wmi is turned on)
I can't use the system to change the maps (instead of cutting the boost) because I use a special device via OBD to change the maps.

Thank you

Re: Audi TT RS - Aquamist HFS-4 questions
 

Answers to you questions

1) If you are not sure of the fuel flow, use the following method to estimate the jet flow:
- 100% water .................1x crank HP (1x 1mm jet)
- M50/W50 .............. x1.5 crank HP (0.5mm + 1mm jet)
- 100% methanol ........ 2x crank HP (2x 1mm + no restrictor)

2) I suggest putting both jet at the exit of the IC to allow maximum charge air cooling and better cyclinder distribution.

3) Not a problem.

You can remove the "DHB" (Disable High Boost) jumper link so when the gauge is switched off (no injection). The system will not cut boost. Th there will be a yellow warning led on the gauge to tell you water injecyion is off but allow high boost.

Do you have a TTRS pinout diagram?

Re: Audi TT RS - Aquamist HFS-4 questions
 

I have the following diagram:
http://i1244.photobucket.com/albums/...delaAlexZZ.jpg

So just to be 100% sure: If I remove the DHB jumper the system will cut the boost when turned on (if any error will occur) and will not cut it when turned off? Thx

Re: Audi TT RS - Aquamist HFS-4 questions
 

Thanks for the diagrams, great help. I will start working on the drawings
[EDITY} . Not what I am looking for. I was after the OE drawings from AUDI, TTRS specific.

Yes, 100% correct.

Re: Audi TT RS - Aquamist HFS-4 questions
 

I'm not sure that what I attached (the connection diagram) is from the TT RS or from 2.0 Tfsi, fsi in general. Can you double-check? The wire colors my be different.

Thx,

Re: Audi TT RS - Aquamist HFS-4 questions
 

You have attached a drawing I did in general for the fsi engine. I was hoping you might have a factory version of the TTRS specific ECU pin out diagrtam so that I can make a proper HFS-xx for the TTRS.

Re: Audi TT RS - Aquamist HFS-4 questions
 

Audi TT (8N engines):

1.8 T 150 PS (2002 -2006) ................... 2002-2006
1.8 T 163 PS (2006) ............. BVP
1.8 T 180 PS (1998 - 2006) ......... AJQ, AUQ, ARY
1.8 T quattro 225 PS (1998-2005) ............ AMU, APX, BAM
1.8 T quattro sport 240 PS (2005 -2006) .............. BFV



Audi TTRS (8J engines):

1.8 TFSI 160 PS (2007 on ) ............... EA888
2.0 TFSI 200 PS (2006-2010) ............. AXX, BWA, BPY
2.0 TFSI 211 PS (2008 on) ............... AXX, BWA, BPY
2.0 TFSI Quattro (2008 on) ......... EA113: CDL
2.5 R5 TFSI 340 PS (2009 on) ............ inline 5 CEPA

Re: Audi TT RS - Aquamist HFS-4 questions
 

I finally managed to source the ECU diagram and electrical connections.
I sent this by email to you.

Thx

Re: Audi TT RS - Aquamist HFS-4 questions
 

Fantastic, I am looking forward to make the wire diagram.

Re: Audi TT RS - Aquamist HFS-4 questions
 

Any update on the diagram? Thx