Windscreen washer pump controlled from an oil pressure switch on the manifold and I have connected a solenoid up in line just before the manifold so the vacuum doesn't suck any water in off boost, the tip doesn't atomise the water but I have aimed the jets at the back of the manifold to create a reasonably turbulent flow, it's not state of the art but it does work.
I am running 10psi and the jets stop any pinking and are letting me run about another 10deg of advance which makes a much better engine off boost!
Will start running 50/50 water/methylated spirits soon to see if any more power is possible!
We find if you use a washing machine waste pump and the solonoid inlet valves you get a much better flow of detergent. This has the added effect of cleaning your valves in the rinse cycle. To stop the pinking use "colour run" at a 50 percent mix with methanol although this may discolour the exhaust. this may not suit your application but is ideal for most cc`s above 1330.
Have tried 50/50 water / Methylated spirits (95%ethanol5%methanol) it is awfully cheap and seems to yield whiter whites although the purple dye in the meths does cause some discolouration on the spin cycle......:-)
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