i got that water spray thing happening. did you notice those two brass nozzles just underneath my number plate INASNT? for now its only a manual sprayer but will eventually go to a full auto system in the future. go to the autospeed site and find that article about the 'intelligent water spray' or something like that. i just followed that, got those nozzles, and the water pump from holden and just went to the wreckers and found a water container that fit just right.
water pump: $40
nozzles: ~ $30 each
some hose to hook it up: $5
switch for manual operation: $5
water container: $10
more denser air for you turbo: priceless
if we have a meet or something soon, i can show it to ya, and the nozzles have got a fine mist spray too.