Please post your HFS-6 install pictures here ...

[Pit Viper]

Well, just to help out the S4 guy, I just switched my A6 2.7 to direct-port this weekend. Pics of the install below:











Water/meth? Who, me? Not in THIS engine bay....

Wow, looks great. I'm a big fan of the concealed install, but maintenance is always a bit tougher.

Did you do any datalogging of the original setup? We would all be interested in any changes in the data from the old setup to the new.

[Pit Viper]

I ran some logs on IAT's and timing, but I'm not sure how good a comparison they'll provide. I'll find out after my new fcm shows up this week.

[20vturbo]

your jets are after the iat sensor so you won't get much on that...The ecu reacts to lower iat's but in your case the only way to gain is to change the timing and rely on the knock sensors..

[Pit Viper]

Correct. Based on a slightly lower flow to the nozzles than I was originally thinking, I may put a small nozzle in front of the IAT sensor as well to gain back the lower air temp for the sensor to see.

I'm more concerned with the actual reduction of knock, which I've had better luck with the direct-port setup for that.

[20vturbo]

Originally Posted by Pit Viper

Correct. Based on a slightly lower flow to the nozzles than I was originally thinking, I may put a small nozzle in front of the IAT sensor as well to gain back the lower air temp for the sensor to see.

I'm more concerned with the actual reduction of knock, which I've had better luck with the direct-port setup for that.

where you getting knock??? what tune, what psi and what timing??
In theory you should have a nozzle about half of all the nozzles in the runners, at the throttle body you have all the flow for the whole motor so having a nozzle the same size as the ones in the ports will prob not be enough..My ideea bbut the aquamist gurus can prob give a better answer

[underpowerd]

full (stealth) engine bay install, 05 legacy gt:


started with heavy corner brace for pump mount (several used, custom bends)



pump installed (vertical orientation. everything loomed. all water lines run through bumper beam)



oem washer tank used (have since switched to all compression fittings)



only fcm visible in bay (on fuse box)



typical glove box home for controller (industrial velcro on bottom of case)



gauge in cubby



with this setup since my early order of hfs-6 debut
thanks to richard for all his support.

[Richard L]

Thanks for the pics, good place for the gauge!

beware of water splash to the pump, the aquatec pump does not like dampness. It must have taken you some time to haver the sytem installed as I can see the system is an eariler version. Better late than never.

Are you getting the car tuned?

[underpowerd]

yes, i ordered just when the system came out; install took a few weeks to carefully consider configuration options and ultimately map all out in my head, and a few days to actually tackle.
but i have been spraying hfs-6 in this config since then (for about 2 years?), so i have confidence in the way all is situated.
you've actually helped me a lot through email/phone/mail with some odds and ends over all this time (Rob)

i just recently found this forum, decided to post the old install pics up.
car was tuned on dynapack with pe1820 a few weeks after install (i didn't bother asking for numbers/sheet, it is an automatic). same setup to this day, ~22 psi, very torquey on the spray.

i've laid a thin bead of rtv silicone at some of the pump seams/wire entry to help protect from water (all factory splash guards are in place, as well), and incorporated a bit of rubber spacers in the bracing to protect from vibration/jarring.

[underpowerd]

^sharp car and looks like a nice install. one thing i'd do is put some loom on those water lines, especially in the engine bay.