I don't know much about SC in comparison to what I know of turbo'd vehicles but I do wish both of these companies the best of luck. The only thing that scares me about the Stillen kit is what I have read on their Titan supercharger from the Titan forums. I personally will be going TT if I ever do F.I. but I hope to see you guys that go SC post up great findings with them.

Great thread idea, subscribed.

This is my current decision tree:

• Same price, same performance (within 3-5%) - GTM
• Same price, GTM kit out performs - GTM
• Same price, Stillen kit outperforms by 5-10% - tossup
• Same price, Stillen kit outperforms by >10% - Stillen
• GTM kit costs more, Stillen kit outperforms by >5% - Stillen
• GTM kit costs more, Stillen kit similar or underperforms - GTM
• Stillen kit costs more, GTM kit performs similar or within 5% - GTM
• Stillen costs more, GTM kit outperforms - GTM

Comparing performance is not easy, so that will be somewhat subjective. I'll probably compare dyno graphs and boost level. Also, with more boost a pulley change away, I'll work in some value of upgradability into the total cost of ownership over the life of the kit.

I will be in similar areas there, price will be a major factor if all are close. And Im still curious as to how the water to ait cooler does. I want to see if it gets heat soak before the fmic.

What if one has more top-end power (about +10 whp) but the other one has more mid-range (about +20 whp)? What do you guys value more?

low and mid.....

mid

i'm more about the low to mid range, all about that 0-60 baby.

I zoomed a neon srt4 with a turbo upgrade I think, and I had the start put he caught up quickly, so I want the mid (50-90 mph), our low isnt too bad.

where did this happen and did you at least win?

He caught me and I had to turn right and he was going straight but he would have pulled on me more, thats why I think he had a bigger turbo in it cuz his low end wasnt there but the high end was. I dont think a stock one would pull that hard in the uppers as they only do 0 60 in 5.6 secs so he had some mods.

you probably should have stayed in a lower gear longer, thats probably the reason why.

Kyle, you're supposed to just be able to click on the "Dyno" button and get to this screen to run 0-60 tests for your car using the iPhone's accelerometer. The "connector" warning is probably only relevant if you're using it with the Wi-fi OBD-II interface that company sells.
http://a1.phobos.apple.com/us/r1000/...480x480-75.jpg

I did and didnt shift untill high rpms, He just put on a bigger turbo that pulls in the higher side, I had him easy in the low end.

Even stock the SRT-4's had no bottom end just because they don't get traction. When they were new i worked on a few, and they really woke up with just a boost controller on the stock turbo. Still felt like i was driving my sisters car with a turbo on it, but quick none the less.

So what would be some of the things we should compare between the two? So far Ive got HP, TQ, low or mid gain, stealth looking, price, psi, weight. Any other areas we should look at when comparing the two?

I guess we now also know that the GTM will have to change compressors to upgrade power but its stage one will give more low end tq. And the Stillen wont need to change compressors as it starts with a bigger one but will lose low end tq for future upgradeability. So 2 kits with different option scenerios, thats good so each person can decide what they want and buy according.

I wonder how much boost the VQ37 can take from a centrifugal SC reliably on stock internals without using race gas?

what you did leave out is that if you really wanted too you could order the GTM with the larger compressor and run it at lower boost level until you wanted to "upgrade" later. As i said in the Stillen thread though why would someone give up usable power now for the chance of a cheap upgrade later. Just do it right the first time, and maybe you won't be always chasing the next upgrade.

Im curious too, I was kinda wondering why 6 psi or 8 psi and not 10 psi etc.. Id love to have a carb legal at the highest, safe PSI possible, but we dont know what is really safe for this car.

Good point, and Im with you there, if I buy it under its capabilities then I feel kinda cheated on power. But as one othr guy pointed out if you know for sure you will upgrade and you need money for the kit and internals then I could see starting under its efficiency and buying as you go. But that wont be me, Stage 1 all the way.

Im really waiting for the Stillen dyno on the Z to come out so I can see how their tq does. Right now I really like that GTM is over 300 tq from the 4K to 7K range and the Stillen dyno only hit over 300 tq at one point and was way under most of the time. I hope that changes on the new dyno on the Z. For me Im more interested in avg tq and hp and having 300+ for most of the rpm range is great.

Im using a Excel to map the differences between the two but I dont think I can post it on here as it messes up the format, is there a way?

here we go I think: If they are other areas I should follow let me know: Until Stillen shows the new dyno, the one they posted of the G is way below the GTM in all aspects.

good infow with the excel. Kinda interested in seeing the price for stillen kit.

Here is a comparison with the G numbers. I will put in the new dyno when it comes out.

Anyone know what dyno GTM used?

Also I wonder how the GTM will change with a full exhaust and CAIs?

you mean with a non-stock exhaust, since it already has it's own SC intake with the kit.

So far the only thing Sam hasn't given you is a stage 2 or 3 dyno with any sort of HFC or catback exhaust modifications to the car...it's purely been stock.

Stage 2, Stage 3 tuning is currently under development and test and you probably won't see dyno's with non-stock parts from GTM until those are finished. But I'd have to ask Sam this question specifically to know if that is true or not...I just know what he's working on now and it makes sense to continue with that work first before beginning to switch out stock parts and tuning with that setup.

Yea your right with just an aftermarket exhaust. Im wondering how much hp/tq we will pick up with an aftermarket exhaust, yea cant do CAIs like you said. Did he say what type of dyno it was?

I would say its a VERY safe bet to assume the Stillen kit will NOT be cheaper than the GTM. GTMs $5k intro price shocked everyone. I hope Stillen follows suit and offers a very agressive intro price, but with their new intake manifold, air-to-water setup, etc Id be amazed if they matched or beat that $5k price point.

And laid to rest:

GTM 8psi
http://i313.photobucket.com/albums/l...0PICS/DYNO.jpg

Stillen 7.9psi
http://www.stillen.com/media_files/s...arger_dyno.jpg

I think we all know who the winner is here.

Keep in mind, Red370, the GTM's on stock exhaust and Stillen has a cat-back exhaust. I'm sure we'll eventually see what happens when they're running a cat-back also.;)

Only time will tell, I just cant wait to see the stage 3 kit from Stillen, imagine, at 10psi? 500+whp EASY

Yep! We are...Both kits look great..Now for a side by side track day..;)

Well said.

when GTM adds its exhaust numbers will be about the same. The one thing Im curious about is still the Stillen cooler, with it being smaller, and I know cuz its water to air it can be, I just want to see if it gets heat soaked before the FMIC. I know FMICs do well but want to see some numbers on the Stillen cooler. I want to see some numbers on the GTM cooler too. Stillen was on the dynojet what did GTM use?

So if Stillen was to use 8 psi and not 7.9(?) how much would it gain? LOL.

I wouldnt so much worry about the inlet temps, both will be fine, however, for you auto guys, i'd worry about finding a good transmission cooler because with that much power, it will be needed. And for everyone else, an oil cooler will now be a must.

and btw steve, we still doing the cats tomorrow? what did you find out from autocrafts?

intake temps are important, they show if the cooler is getting heat soaked or not and FMICs are proven already but the new Stillen cooler needs to be proven, heat soak will take away alot of power.

Yea I will now need a trans cooler along with my oil cooler.

Red370 I will be at the shop at 8 am for the class and then see about the HFCs after that. I really dont want to attempt this unless you are there as you have done them already and I have to have them done by the end of the day as its my only ride. Think you can meet me there in the AM?

text or call me in the morning, the job should only take us a few hours max.

you got any steel wool left? I have the bolt breaker spray but no wool.

yeah, got a shytload man. BTW, we got another 370 on post, Lemers is his name on here, its the purple one.