now i know why that crx was purgin at the line before racing me i thought he was only showing offBy purging your nitrous system just before a race you clear the lines of vapor and ensure that pure liquid nitrous is delivered as soon as the kit activates
here is alink with a good overviewIf it's in your budget, use a purge valve. This will insure that you get the proper mix of nitrous and fuel the first instant you hit the activate button When the nitrous comes out of the bottle and sits in the line it changes state from liquid to gas and is not very effective. If you don't use a purge it won’t hurt the motor because it's a fuel-rich condition; but it will hurt performance. I notice quite a difference in 60ft. times with and without purging.