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Old 10-10-2006, 10:05 AM   #19
Scooby Specialist
Member#: 14141
Join Date: Jan 2002
Location: [email protected] @ 5800 ft on 13T
2002 Impreza WRX


but there's something to be said about not having to fill your tank ever time you drive hard for a minute or two.
Like I said in normal driving, with mulitiple WOT episodes every time I drive the car, 1 Liter lasted about 400-600 mile of driving. I basically topped it off every other tank of gas. This was with a 4 gph nozzle. One key to economical use of the injection fluid is to not trigger the injection until you need it. I monitored my boost gauge for a few days and found that it was relatively rare for me to exceed 6 -10 psi when driving. By setting the boost trigger at 10 psi, it made a major reduction in fluid use. Generally speaking you should not even need any injection at boost levels below the stock max boost of 13 - 14 psi, as you should not detonate below that level on any reasonable fuel.

That is also why it is good to use at least a 2 stage setup like a 4 gph and a 6gph wired so you get a max of 10 gph. A 2 stage setup will cut your fluid demands by about 1/3 and provide a bit of safety if one of the nozzles clog.

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