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Old 13-01-2014, 05:27 PM
infinkc infinkc is offline
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Join Date: Apr 2010
Posts: 29
Default Audi 2010 S4 Direct Port install HFS-4

Finally found time to get my pictures uploaded, enjoy.

I've always planned on putting a water/meth setup in my b8 since i got it. I was running a water/meth setup in my b5s4 and loved it.

About my setup.

I chose to run the Aquamist HFS-4 since it is designed to work with the direct port injection engines and properly inject based on the load of the fuel and the boost pressure.

Since its not easy to inject post charger, I was tossing back ideas on how to mount a nozzle on this engine. I originally was going to tap where the inlet flaps are. I contacted a few vendors to see if they were willing to make me some custom plates, but they didn't want to take it on. I was then contacted by Sean at SRM that he had something in the works and to look out for some great news. When SRM released their plates I purchased them immediately. I had him custom tap the plates for me for the Aquamist, they are normally 1/8 for other systems(you can see the plugs)

Right now i am running the system with my Stasis tune, I plan on going custom once I get my logging done. Car is running great. I plan on taking the charger off in 10k to see how well the meth is cleaning out the intake valves.

I am still working with Aquamist on setting up the failsafe to cut the boost on the charger.

Aquamist HFS-4
Alky Injection 3 gallon tank
All stainless lines with -4AN fittings
Aquamist Custom 96cc Checkvalve jets -6
Aquamist 6 port manifold
50/50 water/meth
SRM Injection Plates

I wont go into details on how to take the charger off, i have had it off before when i did my thermostat.

Everything fit great, hood has zero clearance issues with the added height. Some of the electrical lines going to the back of the charger are a tight fit, but still reach without having to modify anything.

The Controller:


The tank:


Pump is mounted on the bottom of the tank, made some custom lines.


SS line from the trunk to the engine.


I was surprised that I was able to get the line and all the wires through the factory grommet without cutting it, i used the same hole the ground wire came out of.


Mounted the Aquamist valve and flow sensor on the firewall, there are 2 factory holes that perfectly lined up to mount the bracket!


Tank I installed in the trunk using the factory mat and holders. The tank is completely removable, I have quick disconnects on the line. (Thanks Jones2012s4 for the great idea)


Wired up the controller to the ECU wires. (ignition, injector signal, MAP, rail pressure)


All wired in, there are a lot of wires to run, but the system makes it nice that they are all plug in.


Custom SS line i ran from the Aquamist valve to the manifold, i heat sleeved it also.


Where the Aquamist manifold resides.


The SRM kit comes with new studs and spacers, they fit really well.

Last edited by infinkc; 13-01-2014 at 05:29 PM.
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