I can see many people are using the 928 upgraded impeller with the 9lb pulley. Can you post a link to the Vortech impeller please?

Theres no link to the upgrade you have to call them. An if you see many people running 13 PSI on the Stillen SC and on a stock motor your lucky. All the ones I have seen have popped including mine.

Good luck with that combo, your playing with fire.

From the experiences of these guys, I would stick with the stock kit or maybe the 9lb pulley and that's it.

9lb pulley was enoug for me, Z runs nice and strong! Seeing almost 10PSI with Test Pipes.

B-o-o-o-m !!!
 

Hey Octet !
We're all your friends here ... :tiphat:

Check out the thread started by Mikey1600 "So I just ordered my Stillen SC'r" read it thru to the end.
(Problem with the Stillen kit is that it is not really upgradable to any great extent).

Would be happy to sell you my upgraded and Vortech rebuilt Stillen Vortech V3 with the SI impeller (makes 12 lbs of boost with the 9 lb pulley... less than 200 miles on it ... paid $1795 for the upgrade and installation ... make an offer ... it will work but with the following cautions. PM me if interested.

The upgraded Vortech Impeller is more than enough by itself - but don't do it in conjuction with the 9 lb pulley on a stock motor ... stick with the 8 lb one.
You'll be making between 10~11 lbs of boost.
Even that is pushing it with the stock motor @11:1 CR.

With the 9 lb pulley it will produce too much boost...Ka-Boom.

You will also need to upgrade your fuel system and re-Tune as well.

And then - don't plan on racing it hard...you might be OK with some spirited bursts of speed enough to satisfy, but you won't be able to push the envelope for any length of time.
Definitely add an A/F/R gauge and an IAT gauge as well.

The Stillen design (combining the MAF's before the SC'r and placing the IC after the TB's) greatly limits reliability once you start to add power and heat.

Be careful my friend ...

Thanks a lot, much appreciated!

Hey Bob, Don't forget about my chase for 500 WHP and the thread on here. BTW we all know I blew up @ 457 WHP with every upgrade you can do ( Stock motor) ,

Stillens kit is great but no room at ALL for improvement. I even talked to them about a STG2 kit when I was building mine. There were thinking off following me. They might bit only with the Frozen Boost heat exchanger. But the impeller with the 9LBS = bad news :/

For all you modified Stillen Kit owners... I have a few improvements to their kit design that you can do to help make power and be more reliable. I will list them below:

1. Remove the dual intake and replace it with a single 3.5" or 4" cone intake like the G3. Locate this intake filter in the standard G3 location under the cooling plate. Use a 3.5" 45* silicone coupler to get the intake though and into the correct location...

2. Your Charge pipe needs a BOV behind the Charger unit. Followed by your MAF sensors (4" apart and atleast 2-3" from a bend). I would also recommend upgrading the Charge pipe Diameter to 3".

3. Frozen boost Intercooler

4. Coolant upgrade

5. Upgrade your coolant tank to a larger unit.


By doing these things we can negate a lot of the issues with the kit and make the kit more reliable for higher power.

Yea but for that, I look for a GTM kit :/.. To do all that isn't that bad but you'd have to convince Stillen to sell you their kit with out the manifold. An they wont do that as I couldn't even get them to sell me a kit with out that "joke" of a heat exchanger.

Yeah Mike ! --- 'The Quest' for 500 ! .::eek::. --- Somehow it just didn't work out how we thought it would!
I talked with Stillen a few times and they were pretty tight lipped tho they did hint that they may be entertaining the thought of an upgraded kit.
But then again, they want to maintain that 50 State Carb Legal status.

You can order that 9lb pulley straight from Stillen but you need to sign a waiver ... last I heard they were also working on a tune for that pulley.

The Frozen Boost heat exchanger was a good tip ... but still needs an upgraded circulating pump to go with it.

Seems never ending ... BTW : My car is STILL in the shop

There are several good condition used G37 GTM kits on myg37!!! and for less than $5k!!!

These are SC'r kits ?

Yes stage 1 kits go for ~$3500-3800. Stage 2 kits go for $3800-$4000. They sell pretty fast though... Just keep an eye out!

This is a great thread

So here's a question which I haven't really seen any specific info about on here: If you want to get the most out of the Stillen kit by upgrading the impeller and pulley, would upgrading the internals be enough to handle the extra boost or would you need to pull the motor and do some serious machine work..?

Building the motor (internals : rods, pistons, head bolts, etc) should be #1 on your list if you plan on making some serious power... It's your money well spent.

I speak with 100% Perfect Hindsight.
.....
:crying:

Cool man, thanks! That's kinda what I figured. The next question would be: Once the internals are upgraded, what's the threshhold for PSI then? From what I've read, 11psi is the somewhat risky limit on a stock motor. Curious how much more PSI the engine could safely handle once upgraded. I'd love to do both the impeller and pulley upgrade on mines. I would obviously upgrade the cooling system as well..

Okay, looked around a bit more and it sounds like once the internals are upgraded, the stock engine can handle way more psi. I guess that means even more boost upgrades :icon17:

Hey TripleC,

Check out the .: "Forced Induction Finished Builds" :. thread here on this forum.
It will give you an idea as to what others have done.
It can get costly and time consuming though, so set yourself a target goal for performance and also a budget.
Once you start pumping up the power you may also find that you will need to upgrade other things as well.

Good to ask questions - Good Luck on your build !!!

Stillen Rules
 

My local dealer installed Stillen headers and cat-back exhaust. I paid way too much because the dealer added their mark-up but they told me this was the only way to preserve the warranty. I ended up having problems as the bolt in the steering universal joint was touching the headers in hard right turns. It was a little scary at high speed. They replace the bolt with a flat head and it solved the problem. So much for dealer quality!
The additional power is noticeable, especially at higher rpms. I am very satisfied with my base +sport package 370Z, which cost less than my wife's minivan.

Seems there's always those little glitches that need tweaking with aftermarket products !
Glad the missus is happy with her minivan...:facepalm:... I won't tell

If you're looking for more boost and power to push a build motor i would suggest going the turbo route. The Stillen kit is great for 400-450whp after that you're gonna hit a brick wall cause there won't be room to grow. Improvements yes/more power unfortunately no. Just my :twocents:

Oh I hear ya man but I'm not looking to go too crazy with power upgrades since it's pretty gnarly as is. I would just like to get the most reliable power I can out of what I have. I feel like a few internal upgrades, impeller and pulley would be more than enough to keep me happy for years to come..

From what i have read here to possibly get those extra 30-50whp from the kit reliably is definitely a good idea to build the motor. The downside is the cost of those extra 30-50whp but again i agree on building the engine to be safe! :tiphat:

I would be pretty happy with 425 whp/325 trq. This kit probably needs the 9lb pulley to get there though, bu that also puts me into more iffy trans territory. Has FI come out with pricing for their auto trans upgrade yet?

They didn't do much to it...

Level 10

Level 10 requires shipping the whole trans off, seems like overkill for that marginal power gain (9 lb pulley) It would be more worth ti for the impeller and 9lb pulley combo, but it seems the engine has issues with that. Does anyone know how much the level 10 built tranny is?

Google will tell you pretty quickly

I was thinking of doing something like this for the MAF pipe. This still doesn't fix the problem with the location of the MAFS. but might help to get more even MAF readings.
what do you guys think? Sorry for the huge picture, used it off a site.

http://cncautodesign.com/wp-content/...z/DSC_2857.jpg

If you block off any air going directly into the lower filter any issues with the MAFs not being even should go away, it did on mine. It wold be a lot cheaper than doing that.

Its actually not to bad, The pipe, couplers and filter and mounting hardware is $134.55.
plus, it will give me more room under the crash bar to mount the intercooler farther back so I can retain the OEM tow hook.

Hey guys, I'm new to the forums and I'm looking at getting a 2014 370z. The previous owner installed a Stillen SC and has a AEM water/meth kit installed. He has drag tires and the car has 17k miles along with carbon fiber body parts. From what I can tell everything looks to be in like new condition. I started reading everything on FI and Stillen SC. Anything I should know before buying it? After reading parts of this thread I don't wanna buy it and the PSI be to high or water/meth mess up something. I'm new to the car seen and for 30k seems like a steal to me. Anything helps, thanks!!

How much boost is he running? That water/meth kit should keep the intake temps in check which is the downfall of this kit in the first place. However, I personally think they are huge pains in the ***. You always need to worry about filling something up plus its just another complication added into your system. If he is tuned aggressively for meth and it ever runs out or stops working due to mechanical or electrical failure, then it could be devastating for the engine.

This. Plus, between drag tires and meth, the previous owner ran the hell out of the car. I'm leery of buying someone's project anyway, and one that was ran hard scares me.

The mid 3's are right about the iffy zone, there's another guy here who just lost his tranny , and even just with built ones( jwillis) are having some problems as well.

Hey Guys

Is there someone out here,
where the "STILLEN" water pump (from Bosch) and the circulation is optimized?

(Electronically controlled or knows a upgrade pump)

Like this: "Davies Craig from Australia :tup:"

LCD EWP & FAN DIGITAL CONTROLLER - PART No: 8000 -

http://www.hrpworld.com/store/media/.../dc-8000_2.jpg

http://www.stangtv.com/image/2014/09...ies-craig3.jpg



I'll take "now" the cold days and nights use to inform me more ...
And the water cycle to further optimize.....:stirthepot:

If someone has had good experiences or knows a great product,
then please post the information here.

Many Thanks :tup::tup::tup::tup:

Can you guys procide nput on 9lb pulley vs 928 impeller upgrade? Planning to do one or the other (not both-stock motor). For the money and performance which would be the better option?

Just like in the other post you just made. Your motor is proven to handle well over 500whp and 500wtq. Swapping to BOTH of these with a good Air to Air kit will still keep you out of the danger zone power levels but make big, safe power.

If its not in the budget to do both, then the 9psi pulley is a lot cheaper then the trim upgrade. BTW. I wouldnt even look at 928. Just send it in to the guys that acually make that supercharger and for the same price upgrade from the SC trim to the Si trim that makes 2psi more while spinning the supercharger the same speed.

Thx for input