I love how Steve still has his Kiwi accent, wish I was able to keep mine. I also love how Steve still has his hand in every aspect of the company especially R&D, shows a guy that is committed to his business. And you kids are okay too, but you'd be cooler with an accent.

And those early dyno numbers are pretty impressive!

Ah yes, this is looking mighty good Stillen. I'm very impressed.

Where did the 8 psi come from, or is that your guess?

First post of this thread indicates "around 6 PSI" CARB legal kit.

just a guess but I thought I had heard one of these SCs were trying 8 psi. So 6 psi for carb legal, could 8 psi be carb legal too and would it just as safe on the car as 6?

yes...release....nice job stillen... cant wait for that intro price!!

GTM is running 8 PSI. Nobody outside of Stillen knows what PSI they are running.

If you are pushing for CARB legality, the kit will have a low boost level to keep emissions down, so I doubt adding boost will keep it CARB legal.

Thanks Kyle.:tup:

did you all do a dyno with the 18s, if so can you post it?

wow sickkk shop man... I will definitely pay you guys a visit with my Z to check out that room full of super chargers myself :)

You think so?

From what I can see and what I've read previously in this thread...

1) Add 5% for heavy wheels.
2) Add 7% for Automatic transmission
3) Probably running less PSI than race kit. (6ish most likely)
4) Less aggressive tune.
5) There are obviously restrictions in the exhaust system to keep it CARB legal.
6) Im not 100% on this, but I think that G had stock intakes for baseline.

Anyone care to do the math for the race kit on 8 pounds?

Can't use stock intakes. The blower is located where one of the stock boxes would be. The piping is located where the other box would be. The kit comes with its own intake setup. Nevertheless, good numbers. Thanks for the update, Josh.

He's referring to the baseline dyno of the G37.

Right, thats a substract, sorry I wasnt clear. Fixing.

No problem, bro.

8 psi would be considered race and not for carb legal? cant wait to see the final results from both kits and pricing. I still think pricing might be the deciding factor, atleast for me it could be.

I wouldn't consider 8 PSI a race kit. I'm thinking 10 PSI.

Guys dont get ahead here, I am only guessing on the PSI.

Comparing the torque curves with the "other" system this one keeps increasing as the RPMs play above 5.5k, whereas the "other" torque curve starts to fall off at the higher RPMs.

Really what matters is that little E.O. number that comes with CARB certification on a plate visible to the officer. On the Vortech kit for the 350z, it was on the supercharger. Does 99% of the inspectors/officers know what the correct pulley size is - nope.. Even if you get Mr 1%, you take the fix it ticket, put the stock pulley back on, and go pass..

So yes, for legal reasons we California owners care, but for practical use the CARB certified level of PSI doesn't really matter. People are much more likely to get busted for high flow cats or race pipes.

On top of all that, we are talking about mostly new purchased cars up to this point.. 5 years of no inspections anyway.

Congratulations, fantastic result! Looking forward to z version and official release...

So, I think you're 6 car lengths ahead... too soon to declare you the winners of this race? ;)

I think both GTM and Stillens supercharger kits will both put down impressive yet comparable hp/tq numbers. My guess would be price will sway more people than the hp/tq numbers.

I disagree. I think there is SO much more value in the Stillen kit considering the amount of testing and engineering that is currently going into this kit. If you are going to pay 5k+ for an SC, you aren't only considering price and hp figures. I have seen a lot of things that, to me, are worth much more than whatever dollar difference there is and that is even before we talk about the HP figures. Think about the fact that there is a water cooled intercooler inside the custom designed intake manifold. I'm not sure exactly where the comment about the "other" kit having more engineering going into it than the stillen one came from the other night....but I honestly fail to see how that is possible. I'm sure they will keep it competitive anyway.

I think when people are spending this much of their hard earned money they naturally tend to weigh many more aspects of the buying decision than they would for something cheaper. Price is never the #1 reason.

I'm going to agree with Travis and say this race is over.

I would really like to know how these sc'ers do with the 7at tranny.

I also think the water to air vs air to air is way better for intake air temps. I am really suprised that GTM is not using some type of water meth injection with their kits.

Nice job Stillen !!!

I hope the price is reasonable..... I do expect it to be more than the GTM kit...by about 20 percent...

I agree completely, Reliability will be the number 1 factor for me, Power comes second, I want to know that I can install a kit and drive worry free for the life of it, or at least for most of it.

:iagree:

+100 thats exactly what I was thinking after reading these last few pages :yum:

+1

While comparing Dyno printouts from GTM and Stillen I noticed that the GTM sc had a million parts. On these systems under stress anyone of which could be a point of failure. Although I haven't seen the Stillen sc laid out, from what I can tell it's far less complex as to the number of components. For a DD that for me would be a plus for Stillen

I hate to ruin the mood, but the only thing bothering me about this kit is the torque graph. Everything else looks great though.

The torque curve is pretty consistent with the type of supercharger they are using. Boost builds as the RPM's come up, which is why the torque peak is now nearly 7000 rpm.

Until these kits end up on customer cars and are subjected to various climate differences, we won't know who made the right choice on intercooler design. "More" engineering doesn't mean better engineering. In fact, keep-it-simple-stupid can be a selling point in itself.

There is no victor here. Both kits, when tested by themselves, performed well. I'm going to hold back from the temptation to save a few hundred on the presales and wait to see real customer results before making up my mind.

Anyone calling a victor at this point on either side is an obvious :nutswinger::nutswinger:

quick question Kyle, some of us rev to 8150rpm right now. Not that its a big deal, but I assume the tuning map for the kit is only responsible for 7500rpm?


MMC Racing - Stillen is doing extensive road conditions and track testing that simulate real world conditions. Also just because you say that makes someone a :nutswinger: doesn't make it so.

I disagree with using the number of parts in a kit to judge reliability. It's far better to look at a company's track record and reputation for quality in their products, IMO.

Nice #'s
I have a 370 Sport 7 AT, my base line is 265 SAE rwhp. Your dyno reads HP. Is it standard HP ?
How can a Stock G make 289 ? With all the stillen bolt ons I made 292. You made 133 rwhp. on your SC. So that would put my car at aprox 398. I would like to see your RWHP converted to SAE RWHP. There is a difference between the two. It appears that your dyno reads a little on the high side.
I have your SC on my 350 z and i never got near your posted #'s And my SC was also ported with a custom stillen stage 4 tune in it.

I'm not trying to derail this thread, but when looking at the "other" kit's graph, the supercharger improves torque in the low RPM range. I think moving enough air at low RPMs is Vortech's primary weakness. The high impeller speed of the Rotrex is definitely helping it produce more low end torque, imo.

To be fair, Stillen has made no mention of what trim they are using. I feel they can combat this issue by switching trims.

They used a Vortech V3.

That's the supercharger. Vortech offers two trims though for the V-3... Si and SCi. I feel Stillen could work with Vortech to make a custom trim as well.

Dyno's read different depending on how they're calibrated and corrected.

Did the gains match what was advertised in your case?

They are simulating driving around a track with 120 degree air temps in California where it has been lucky to make 70's recently?

They are simulating driving in the Northeast in 30 degree air temps in California where it has been lucky to get down to 50 in the evening?

:nutswinger: is :nutswinger: