| of timing advance, no detonation, ALL ON 93 OCTANE PUMP FUEL. (These next few statements are just 'off the cuff' thoughts running through my mind, please excuse me if they're a little off) This stuff is truly amazing. Considering that windshield washer fluid costs $.98 at Wal-Mart and I've just been running the piss out of the car for the past 10 minutes, about 40% of the time at WOT and I've only used about 1/4 of a gallon, I should be good for 40 minutes of 40/60 running, or about 25 minutes of full WOT spray. It is without a doubt in my mind that there is a lot of power to be gained from using water injection. You can turn the boost and timing up just like you can on race fuel and based on my experience, I will see at least a 50RWHP gain by using it. Typically on the dyno I have usually seen about a 50RWHP gain in performance by using race fuel, which facilitates the ability to safely run more boost and more agressive timing. Chris Damato's HKS2530 powered TT made around 540RWHP on pump fuel without detonation at 20psi, and then it made just shy of 600RWHP at 25psi and more aggressive timing. Although the water injection itself likely only makes a small contribution to power increase with nothing else changed, it is the fact that you can run more boost and more timing which will make more power. But in this case, it doesn't cost you $5 a gallon and it isn't being comsumed all the time - you're only using it when you need it. I would be inclined to also say that you could run 87octane fuel in your Z at 93 octane pump-fuel boost levels without detonation either, but I wouldn't suggest doing this. I have larger nozzles to use if need be, but at this point I am squeezing as much boost out of the turbos (Z1 Stage2's)that they will produce and I'm running some aggressive timing advance as well. I dont know if there will be any advantage to going to larger nozzles if there is no detonation, but the cooling effect of the water itself may lend to a few more HP - we'll have to dyno-test that theory. So far, I'm sold. (Thanks Nick!)
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