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Old 27-06-2017, 04:28 AM
theboostshack theboostshack is offline
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Join Date: Mar 2017
Location: Sydney
Posts: 14
Default Re: HFS4 Install on Non Intercooled 2l Turbo

G'day Guys,

After a few minor changes to the HFS4 system, the car was tuned on the weekend. The ambient air temp was around 18 degrees C and without the water meth injection activated, the car made 265 hp @ 16 psi boost. Intake air temps peaked at around 107 degrees C.
From there we turned on the Aquamist system and saw the IATs reduced to 45 degrees C at the same boost level. We then begun turning up the boost. At 25 psi, the IATs were beginning to reach 70 degrees C. At this stage, the decision was made to fit an extra 0.6 mm (260 cc) jet, roughly 400 mm from the compressor discharge, between the 1.0 and 1.2mm jets. Boost was then increased to 28 psi; with a corresponding power output of 345 hp. IATs peaked at 60 degrees C.

The water injection system utilises 1.2mm, 1.0mm, 0.6 mm and 0.5 mm jets and 180 psi pump pressure (set via the allen key screw in the pump head). Maximum flow is calculated at round about 1500cc/min. It should be noted that no changes were made to the ignition timing. There may be an opportunity in the near future to experiment with ignition timing but it would require some addition charge air cooling to remain on the safe side.

Cheers.




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