Id like to see that color up close.

Now we have a good battle going on! Here is my chart with the new numbers:



Keep in mind Stillen had an aftermarket CBE and GTM did not (GTM we need a new dyno with CBE please).

Numbers are still very close and if GTM does a dyno with a CBE I think their numbers will be slightly higher over all but not by much, so its down to price and preference, and for me if the Stillen cooler is keeping things as cool as a FMIC will.

Stillen has a self lubricated SC, does GTM?

More peak power and from what I can tell at least the same, if not more torque at every RPM level. Less boost, bigger supercharger on the Stillen kit. That means that the Stillen is blowing colder air from the get-go. Then a huge intake air temp drop due to their very efficient intercooler. On top of that, the Stillen kit is very easily and cheaply upgradable to make more power.

The price is damn close too considering the completely custom intake manifold and the air-to-water intercooler.

Right now Stillens TQ avg from 4k to 7K is 275 and GTM is 270, add the CBE should be higher.

I think with a CBE the GTM will be about the same to their peak numbers and probably have a better TQ avg.

Does a .1 difference in boost really mean anything performance wise?

So with a bigger SC its blowing cooler air to start with? And does that mean its not in its max efficiency range?

Im still on the fence with the cooler efficiency, I want to see intake temps and compare them to the GTM intake temps.

Its gonna be a tuff decision.

With regards to future upgrades.

All you need for the stillen kit is a different pulley and supporting mods; with GTM you need_______________?

I really wish the Stillen kit had something to make the engine bay look "complete".

Upgrades are good for those that want it but most will stay stage 1 due to emission tests, longevity and all. So if you dont plan to upgrade then that isnt a factor, but for some it will be so it will be a factor to some. Since I plan to stay stage one it wont be in my factoring.

So when we are driving between the 4K and 7K rpm range what is going to make us go faster TQ or HP, if you had to pick only one?

This is not true for emissions. Going up 1 or 2 sizes (well, down actually to a smaller pulley on the blower) with proper tuning (and CATs still on the car) will pass every sniffer test out there. Specifically to California and visual inspections - you would have to go to a smog testing center that actually knew the correct diameter of the stock pulley and remember to measure for it. Same with getting a hood popped by a cop. This is really a non-issue. Absolute worst case is you change pulleys and get reinspected.

As to additional wear on a vehicle, we can look to the 350z community and see how many people went to atleast the 3.12" pulley as an upgrade and how the engine has held up.

So why arent stage 2s carb legal? If I buy stage one and upgrade to stage two Im still in legal limits?

You miss my point. There is what is legal by the letter of the law (kit X with certification) and what will pass visual and sniffer tests, but not technically be legal (kit X with certification, but owner upgrade pulley and tune).

Then there is option 3, which is modifications not even close to legal, but you get someone to pass you.

Oh Ok so you are saying I can upgrade to stage 2, which by the law is not legal, but no one will be smart enough to tell that I did it.

Cha-ching.. Or you spend the 30 minutes to change pulley/belt and reflash before inspection.

Just for giggles, here's a comparison of HP & TQ values between the two dyno images.

Values used to generate this composite image were made through visual approximation of the HP & TQ values. Should be fairly representative of the original individual curves... I think.

Guess you are just going to have to wait to see the differences in the Stage 1 kit vs. Stage 2 and Stage 3.

This topic has been beaten to death...one person says

-1 GTM because you have to change compressors

another says:

-1 Stillen because you are buying a compressor but not using it to it's full potential

another says:

-1 GTM because it's going to cost more to upgrade (with absolutely no supporting facts to prove this by the way)

It all really boils down to if you want a Supercharger and aren't planning on upgrading again later then pick the one you want based on something else...

If you want to upgrade later than you really need to wait and see all the options for upgrades...

...hell we don't even know what Stillen's upgraded kits cost for parts OR labor either...so you really can't make an arguement for one company over the other.

Buying and installing a new compressor housing is always going to be significantly more expensive than buying and installing a pulley.

That's all wonderful and everything, but until you can provide me with some actual information that tells me how much the stage upgrade is for each company's kit and then everyone on this forum can actually use those facts to determine which upgrade is more expensive...the idea holds no water.

Simply stating that because putting on one part is typically more expensive than another doesn't make Stillens stage upgrades cheaper than GTMs, which I know has been implied in some of the propaganda I've read in the forums.

Here's another good example of some of the trash i've seen...if you aren't willing to post psi numbers or factual proof...you can't make a claim that you've increased your horsepower and lowered your boost at the same time. That's marketing propaganda used to just hype up sales. If you are going to make that claim in a public forum, you'd better provide the information to back it up...if you don't...it's just marketing bullsh*t and an intelligent person can see that.

You can call me a Stillen hater all you want too, I'm not, I'm just going off of what I've seen in some of these forums, you can't tell me it's not true. I'll go pull all the posts that support my statement.

how bout we not turn this into a GTM vs. Stillen hate thread huh? Steve started the thread to do a comparo, not, my kit is better than your kit and visa versa.

FYI, here are the prices for some of GTMs stages: GTM Motorsports*::*FORCED INDUCTION*::*GTM G37 SUPERCHARGER KIT

In that case I guess we'll have to wait until GTM puts out a dyno with their CBE on the stage 1 because they have yet to do that (which by the way was not mentioned in Stillen's press release).

I realize you don't want to read this...but what I dont like is ppl discussing/comparing systems based on false advertising.

If you are going to market a product and put numbers out for what it does...the numbers shouldn't be skewed with other modifications, like their CBE.

I realize you may be an informed reader and have been keeping up with the other threads...but what about those that haven't...what about those that just saw the press release and said "WOW, Stillen's number's are better!". You can't tell me...that all that waiting we did why Stillen was putting together their release...they just missed this little detail? Really?

Take your "I love Stillen" hat off for a second and just tell me I'm wrong.

This thread is funny, you are getting all worked up over nothing. Its a supercharger man, relax, this is supposed to be fun.

I think it's cute you think I'm worked up. You got worked up when Shumby posted, so take your own advice...this again is assuming I'm worked up over something.

Yeah I realized I was being a complete idiot. Not worth it. I don't really care about this whole SC thing, I picked the one I think is better for my own reasons and thats all I care about.

Can't argue with you there. If only most people would just say the same thing, rather than try to formulate some sort of pro/con that isn't based on a relevant piece of factual information...these threads would be more informative.

Agreed. I did the same thing. I do find it entertaining to check out the info for both of these SC kits even though I've made my choice. Considering the factors that I find important, I have no doubt whatsoever I chose the right one for me.:tup:

Well, I think whats going on isn't about superchargers. I think its about people who have friends at company A or company B or simply they have just had a good experience with one or the other and feel like they have to fight the fight for them. I admittedly got caught in it too, but I can take a step back and see I was being immature.

I wanna see a shootout with both kits, Steve from Stillen against Sam at GTM, Buttonwillow, lets get it done.

^ That wouldn't be fair.

Given Steve's racing heritage, Sam might as well be riding a big wheel.

The more I think about it, that would be hilarious.

Ok, Steve Millens supercharged Z against GTM and Mike B :)

Not much per stage at all.

Lets see if I can get this back on track,

if a CBE makes about 15 whp and TQ then I would think the GTM numbers should jump that much thru out the rpms. A question I have is from the 4-7K rpm range which will make me faster tq or hp? And Im still trying to see what dyno GTM used? Oh and why 7.9 psi? does .1 really mean anything when it comes to fi?

I don't get it. Unless these two kits are tested on the exact same 370 on the exact same dyno on the exact same day (temp, humidity) then these debates on minor performance differences are meaningless. Then unless the kits are track reviewed by the same drivers the same holds true.
So I would just go for the one you like most for what ever reason or wait until there can be a true shootout review, which I suspect will be many months if ever. JMO

Well for me i will take GTM. Just because of my one simple reason, engine bay of GTM SC kit looks much stock looking setup. Comparing to stillens beutiful intake manifold. I just prefer simple looking sleeper status setup.
Noobies wont even know theres some extra ponies under the hood
(targeted to some of my ricer status friend)

I've been searching but can't find any posts that talk about this, can you put a FSTB over the Stillen kit? Do the 370Z's come with a stock one? Just the NISMO kit?

What are you asking for is impossible. I would be more than satisfied to see 2 370z's, same trans, baseline and final on same dyno, dyno SAE correction. Then compare the % increase. The cars would baseline on the same day and then come back for final results on the same day. With both companies in So-Cal, this is actually doable. Pick a 3rd party dyno for baseline and final numbers.

The FTSB will clear.

has anybody talked about condensation on the stillen's kit? please let me know why it wouldn't be a cause of concern... thanks...

Im waiting for intake temps from both kits during hard driving to see if they are doing a good job of keeping the temps down.

right now Im on the GTM side as the numbers are very close, and I think GTM will actually be a bit better with CBE, and I know the FMIC is proven already, as Stillen still needs to prove their cooler keeps temps down. I know they said 100 degrees cooler, but cooler than what? A 400 degree engine bay? Also $800 is a good portion of the install cost. Plus I will stay stage 1 and not upgrade.

there u have it... zsteve with the GTM and red370 with the stillen...u guys should set up dynos at the same time and date...

that would be cool but he will moving in a few weeks.