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Old 04-01-2005, 12:44 AM
Steve VXR Steve VXR is offline
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Join Date: Jan 2005
Location: UK
Posts: 10
Default 1S system on test

I've just fitted a 1S kit to a Vauxhall Z20LET (2.0 litre 16v) turbo engine, which runs at 24 PSI peak boost pressure to produce a dyno'd 296bhp (96 bhp over stock)

With the system armed and set to come in at 10 PSI boost the car was run on the road, with a thermocouple fitted in the intake after water injection point to determine induction temperature. Water injection is with a 0.7mm jet in the intercooler neck. The system is all working fine and the car seems to respond smoother with the injection on.

However, the temperature did not appear to be reduced with the water injection on, ambient temperature was 12 deg C, with after intercooler temperature peaking at 27 deg C on a full throttle run. I know this was only a short burst of acceleration before cutting throttle, as this test was on a public road, so speed is an issue. The same peak temperature was achieved with the system switched off for the same timed acceleration run.

Main question if anyone can answer is whether there would be significant changes in the induction temperature during current weather conditions in the UK (ie winter)?

The system is currently running on pure water, as we haven't got any methanol to mix in as of yet. Would the methanol content make a huge difference?
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