Just wanted to write and give everyone an update. We dynoed our Z with and without the intercooler spray bar. On our first two runs we ran with WI only. Once we saw these two runs were consistent we made a run after spraying the intercooler with the NX chiller kit. We made an additional 17rwhp and 22 rwtq. I think their could have been slightly better gains had we given the intercooler a longer burst of nitrous prior to the run. However, I still think this is a respectable gain and would probably be even greater under hotter conditions. Just thought I would let everyone know our results in case they were wondering what type of results they might get out of this product. The only concern we have is a slightly leaner A/F. Jason

 

You don't think that the power gains were a result of the nitrous getting into the compressor inlet pipes? Especially considering the leaned out AFR.

 

just so I understand, do you manually turn the sprayer on with a button? It's not connected to the gas pedal or anything right?

I'd think this would be a decent mod for drag racers who want to freeze their intercooler before a 1/4 mile pass

then again, IMO you might as well just run a small shot of nitrous anyway - better power gain and it'd also cool the intake charge at the same time

 

miaplaya, We sprayed before the pull, not during. I think it ran a little leaner because of denser air. Jason

 

Sentry65, It is basically controlled like a purge. hold the switch and it opens the solonoid and releases the nitrous into a spray bar that fogs the intercooler. Jason

 

Why not use the nitrous the old fashion way. Makes more hp/$ of NO2.

 

MardiGrasMax, We decided to go with both. A direct port set-up and a chiller. Last year we found our Z would "heat sink" in the summer months with somewhat close runs down the strip. This will allow us to further cool the IAT if we decide to make runs occasionally without the nitrous. Also I think alot of people may not want to introduce nitrous into their motor especially if they aren't built. This would allow those folks a way to potentially pick up a little more power with reduced risks. Jason

 

1% density increase per 11F drop in charge temp adds up

 

lol...and you thought you knew everything...lol.

just bustin your *****.

 

Not bad, how much leaner was the A/F-.5 point? Why dont more people run the CO2 sprayer kits more, still will cool and wont lean out your motor with N20 and you could spray during a run.

 

Alberto,

his A:F wasn't leaning out from sucking in N20; it was leaning out due to the higher density of the super cooled air that the "frozen" intercooler helped create.

 

Well thats been the theory of a lot of people on this chillers. I can't say its ever been 100% discounted yet. I understand they didn't spray it with the motor running but it would be interesting if someone sprayed the intercooler with the compressor inlet pipes run to a place where there was ZERO chance of a latent dose of nitrous being ingested.. It would make a good MythBusters episode...

 

why not spray alcohol/ water mixture on the IC with a bug sprayer before your runs? well i guess its not as cold but its alot cheaper..

 

+1

cheap and easy. You could even get some 90 % isopropyl alcohol, that should do the trick.

your IC will get nice and coooooollldddd

 

If you sprayed while moving....there are so many other places the nitrous can go before it would even come close to going into an inlet. And the fact the the spray bar is right up against the intercooler would lead me to believe that the majority of it would be on the surface of the intercooler and then swept away by the 100mph winds (or however fast you're going). I get what you are saying, but more air (denser air like mentioned before) will cause the a/f ratio to vary slightly.

 

+1 No way nitrous fumes from an IC spray bar are getting into the intake tract enough to have any effect. When you spray it into your motor its a liquid at the fogger nozzle in the intake. Ive sprayed a 35hp jet of just nitrous, no fuel, into my VQ30 with 14psi of SC boost and the AFR only went up 1/2 a point.

 

you could always just throw a bunch of dry ice in the intake pipe and suck up the cold fumes, it won't even turn to liquid

 

alberto, .3-.5 a/f increase. Only jumped to .5 increase for a few hundred rpm. We will spray it longer and datalog a few runs down the track to see if it is anything to be concerned with. Jason

 

As a few of you have mentioned their are alot of different routes one could take to cool the intake air temp. I posted our results to let people know how we did using this system. I believe it is definetly a good way of cooling the intake charge for certain applications such as a FI Z that hasn't or isn't going to build their motor.

 

How long does the spray bar spray the nitrous onto the IC? I might manually spray the IC with nitrous prior to a run and was wondering how long you should spray.

Thanks