HFS-4 Q&A, application for your engine...

[monkiboy]

richard -

i'll be using my hfs4 on my 2008 subaru wrx with the stock ECU. is it safe to presume that i can use the 2011 sti wiring diagram from the installation diagrams in HFS4 or should i use the 2008 sti diagram from HFS3?

with the stock ECU being used, i would not be using the blue, MAP sensor, correct? under what conditions would one use or not use the blue/MAP wire connection?

thank you!

[Richard L]

AFAIK, the ECU is the same on the 2007-2010 sti model. I have revised the H4 drawing for the sti.

I suggest using the blue wire (boost) so that you can increase the flow based on boost only or share with the F-idc.

[U-20t GTI]

Hi Richard,

I am new here so want to introduce myself and am looking to see if anyone has done an install on a VW MK6 2.0t TSI GTI (or other 2.0t tsi VW) yet? Looking to see if there is an install wiring diagram around, I know a few over here in the states are interested in the HFS-4 system.

A little about the car:

Car: 2011 MK6 GTI
Engine: 2.0t with rods and over sized Farrea valvetrain
Turbo: SS cast manifold to Precision 5530 .63 a/r to 3in turboback
Drivetrain:Clutch Masters fx400, Koni yellows, Eibach sportlines

Approximate power now is 410hp at the crank (20psi) and once a fueling solution comes about I am looking for 550hp (25+psi) at the crank.

Will be installing an HFS-4 system, .4mm direct port + .6mm nozzle post intercooler. Two other questions, Which restrictor would you recommend .7 or .9 since I am somewhere in the middle of the two for flow. Also, what is the recommended max distance for the FAV and the nozzles?

Edit: 70% meth 30% water for the mix, I may leave the post intercooler jet out until after the HP jump up.

Thanks in advance if anyone can help with wiring.

[monkiboy]

Originally Posted by Richard L

AFAIK, the ECU is the same on the 2007-2010 sti model. I have revised the H4 drawing for the sti.

I suggest using the blue wire (boost) so that you can increase the flow based on boost only or share with the F-idc.

thank you richard. i saw the new diagram 07-10 STI and will use that for install on my 08 WRX.

[Richard L]

Just checked, it is the same as the sti.

[monkiboy]

Originally Posted by Richard L

Just checked, it is the same as the sti.

wonderful. thank you, sir.

i have a 4 cylinder engine, running 50/50 on 1000cc injectors at max 26psi boost and came up with the use of two 1.0mm jets.

per your posts, above i should not be using any restrictors, correct?

[Richard L]

15-20% of 4000cc/min = 600-800cc/minute.
Two 1mm nozzles will achieve the target flow. No restrictor is needed.

Are you looking in the region of 400whp?

[monkiboy]

Originally Posted by Richard L

15-20% of 4000cc/min = 600-800cc/minute.
Two 1mm nozzles will achieve the target flow. No restrictor is needed.

Are you looking in the region of 400whp?

thank you, sir.

i am looking to be around 455+whp

why do you ask - any further thoughts or suggestions? possible third 1.0mm jet?

if just the two jets, best location with a FMIC, would be the first cool charged pipe off the core to the TB, correct? perhaps three inches apart along the length of the tube? and 90 or 180 degrees apart along the circumference of the tube for optimal cooling and atomization?

thanks!

[Richard L]

I am just curious what your target is.

You only need to using three nozzles if you are going for 100% methanol.

Two nozzles at closest to the outlet of the FMIC, 3-6" apart (along the direction of air flow). Try not to install the nozzle at 6-o'clock due to oil contamination. Anywhere between 8am to 4pm.

[monkiboy]

richard, thank you. i am very clear on install, now. i'll use two 1.0mm nozzles installed per your description. i'll post up my results soon enough!