If you reall want to approach it that way, try it with the cats first, dyno it, look at your boost, then put the stock cats back on, dyno it and look at boost again. You'll find that with the cats, you make more hp with less boost. Put the more restrictive cats on and boost pressure goes up, but make less hp. Correct me if I'm wrong, but more power at less psi boost is better/safer.

Exactly. People are obsessed with a boost number. Who cares about such things if the power is there.

Phi and MMC, I understand your point but what I'm saying is different. Power is made on flow. The car clearly has the ability to flow more than the stage 1 rotrex unit does. So that tells me that you could use a bigger unit that flows more which would make more power. A bigger unit would flow more and start getting choked up by the amount of flow of the actual motor, thats when you would see PSI start to rise.

So no, its not that people are obsessed with psi numbers, its that you could be making more power because the ENGINE is capable of flowing more than the SC does.

I dont care one way or another, I just want good usable power. I will be trying it out both ways. Additionally, I just got nice little gift from a friend - a brand spanking new AEM water/meth kit. Supposedly these are no joke...We already tore apart my trunk last night to get ready for the routing.

I should take a poll on this but I know Sam knows best. I'm still not sure where to tap into...different points will require a completely different way at looking how to 'custom' tune it. I may go the safe route and just put 2 small nozzels after the mafs just for the purpose of cooling the charge (distilled water)

direct port into the manifold.... How come you are using meth?

The AEM unit was given to me by a friend as a gift. So why not make use of it no?

Besides, maybe this will give us some new insight for others to either try it or stay away. Oh and I dont think i'll go meth, just water injection. I just want to have a cooler charge, I dont want to have to completely change the tune or rely on the meth for added tuning.

Yeah, I for one Im eager to see what you can do with it. I was just asking to see if you were going to try and crank up the boost. There are no power gains from just adding WI alone...

Has it been shown that the rotrex stage one unit can't flow more?

Or have they just not chosen to put a larger pulley on it and see? Sorry if this question has been answered previously, I don't think I have overlooked it in my reading through.

Well, usually just by significantly cooling the charge there is a 8-12whp gain from it without tuning.

No body is obsessed with boost number, i'm obsessed with whp number. Okay, you tell me this, why does people with the LTH not making as much power as people with stock cats. I personally don't give a damn about how much boost the engine is holding, but the point is which exhaust set up will make the most power with the SC kit.

As I understood it, and please correct me if I'm wrong, 8psi is the top of the range of the efficiency zone of that unit. Higher boost applications would require moving out to the Stg2 compressor...


Eh, the cooling effect helps keep the mix from igniting prematurely, but power gains are negligible. Lot of people say untuned "X" injection actually loses power because it inevitably takes the place of some fuel that would otherwise be burned... anyhow..it will work to keep your motor a little safer...

That is not correct, the same supercharger unit is making over 11 psi on our 350Z HR supercharger kit .

Sam

But you are also displacing air/fuel mixture with water vapor.

Out of curiosity what is the upper effienceny range of the stage 1 unit on this car? 500 crank HP as listed on the front page? Wouldn't that be right around the 8 psi that is supplied with it? Obviously there are many factors involved in all of this so I don't expect a precise answer, just something general.

Also, dumb question but what kit is being installed on cars and sent out, stage 1 correct? Stage 0 has yet to be installed or sold for any cars?

Could be, but oustide its efficiency range though?