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  #11  
Old 13-08-2012, 06:06 PM
Richard L Richard L is offline
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Default Re: Audi TT RS - Aquamist HFS-4 questions

Sorry, have been watching the Olympics at weekend. I get on to it immediately.
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  #12  
Old 15-08-2012, 10:07 AM
Richard L Richard L is offline
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Default Re: Audi TT RS - Aquamist HFS-4 questions

This is reasonably accurate.





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  #13  
Old 01-09-2012, 04:01 PM
cipsony cipsony is offline
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Default Re: Audi TT RS - Aquamist HFS-4 questions

WMI finally installed and is working perfectly

I used water and ethanol (ethyl alcohol) --> 55% ethanol.
I placed the nozzles just before the throttle body as the intercooler hose is too thin (I ordered Forge intercooler hoses and waiting for them to arrive).

The gain in power (after increasing the boost and advancing timing) is about 10% and the car feels great but I think that more can be extracted so please help me with the following questions:
1) Currently I don't see any drop in temperatures (I see 25~30 grd above ambient temperatures on high pulls) compared to when the WMI is not used. Do you think that using methanol instead of ethanol will help cooling down the air charge?
2) If I move the nozzles on the intercooler exit plate as marked in the picture (or on the hose that connects to the intercooler exit) would it help with cooling down the air charge?
3) I noticed that with the gain knob in the middle I sometimes encounter some hesitations (the boost is reduced or at least it behaves like this). If I rotate the gain clockwise everything is ok and the car accelerates without hesitations. This behavior comes from reducing the flow or what would be the reason?
4) What is the role of the gain knob?
5) My car makes a maximum 1.5 bar at around 5000 rpm and then it drops constantly until 1 bar @ 7000 rpm. Should I alter the Boost/IDC knob or leave it in the middle position?
6) When wmi is turned on but I drive normally without accelerating the car the display behaves like in the movie: http://s1244.photobucket.com/albums/...MI_problem.mp4 Is this ok?
I attached the final diagram received from you in case someone will need it: http://i1244.photobucket.com/albums/...iagram_v02.gif
Attached Images
File Type: jpg intercooler-forge-motorsport-audi-tt-s.jpg (56.9 KB, 17 views)

Last edited by cipsony; 02-09-2012 at 09:14 AM.
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  #14  
Old 05-09-2012, 11:25 AM
Richard L Richard L is offline
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Default Re: Audi TT RS - Aquamist HFS-4 questions

Sorry for the late reply, busy time of the year for me.

Ethanol + Water injection:

1) Rate of evaporation reduction will depend on the boiling point of the injectant and inlet air temperature. Also the response time of the sensor. Thermocouple is the fastest and most accurate than the thermister based sensor used in car. Thermister is slow and often being heat soaking by conduction to the surrounding masses.

2) This is the most ideal location, please do it. Ample time to mix and evaporate.

3) The hesitation may be be link with the lean AFR. Reducing the boost will also reduce the water/ethanol injection. It is just a guess. Try moving the PI-R trimmer to the left to increase flow by boost.

4) the gain knob is for rescaling the input signals to attain full scale response of the system.

5) You need to make some experiment on this one. It all largely depend if you want to add more water/ethanol in the mid range.

6) It appears you have a longer than necessary distance between the FAV and nozzle. The initial ramp is most likely to be due to the action of expelling the air inside the hose.
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  #15  
Old 11-09-2012, 02:36 PM
Bikerz Bikerz is offline
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Default Re: Audi TT RS - Aquamist HFS-4 questions

Quote:
Originally Posted by Richard L View Post
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
These are INCORRECT!
According to the TT and mk5 GTI forum.
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  #16  
Old 11-09-2012, 10:11 PM
Richard L Richard L is offline
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Default Re: Audi TT RS - Aquamist HFS-4 questions

I took them off wikipedia, please correct.
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