Pre-compressor water injection
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Uploader Comments (99GSTracer)
All Comments (42)
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Awesome! You never cease to amaze me with the shit you pull off. Keep it up!
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lol, no, it won't cause the aluminum compressor wheel or cover to rust. The atomized water vapor flashes off almost instantly. Zero fluid comes out of the compressor outlet.
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We tested methanol and water, and water outperforms for pre-compressor injection. Most users than incur compressor wheel damage have the nozzle in a poor location. Usually too far upstream and not directed directly toward the compressor. Idealy, the nozzle should be 4" from the compressor and spraying directly at the center. This way there's little possibility of damage occuring.
There's one proper way and a dozen improper ways to attempt this.
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This was great guys thank you!
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How do you determine what size nozzle to use?
and if you should have your pump turn full on, or progressively?
unijabnx2000 7 months ago
@unijabnx2000
The best way it by testing and datalogging information. Everybody's setup is different, so you'll need to determine what works best for you. I've never been a fan of progressive setups. I like my pump to either be ON or OFF. And I prefer a boost-based or load-based trigger.
99GSTracer 7 months ago
how much do u see you intake temps drop?
maldo72 7 months ago
@maldo72
Without injection, compressor outlet temps accelerated at 29 degrees F per second. With injection, we reduced that to 11 degrees F per second. A substantial difference. We also picked up an extra 1.2 PSI boost from the added compressor efficiency.
99GSTracer 7 months ago
is your BOV not responsive enough to keep it from shooting back thru the anti-surge ports?
unijabnx2000 7 months ago
@unijabnx2000
That surge was a quirk of the dyno. Definitely not something you would see with normal driving.
99GSTracer 7 months ago