So just ordered my Stillen SC

Z&I

Thought long and hard on this ... and tried my best to do as much research as possible.
With the lower compression it will allow me more boost and more hp at the top.
With the built motor I can go up to 15~16 psi with the 9:1 CR.

The down side is losing some at the bottom...but then again, that might allow me to leave at a higher rpm.
Without having done this though, it is a guessing game.

Thought of the 10:1 CP's as well, but that extra potential 50+hp with the 9:1's was just too tempting.

My Stillen SC'r has been upgraded to SI trim which ups the max boost to 22 psi and 1050cfm.
Vortech has a series of pulleys that will allow me to find the right one.
Hope the V3 SI will be up to the task.
If not then I'll have to go for the V7.

I'm still open for suggestions and input ... the pistons aren't in the motor just yet.
Any and all info welcome here...

Thanks,

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Pro4Jackster

The first bit of advice from me is:

Do not confuse the Vortech head units limitations with the Stillen kits limitations. They are two very different things. The Stillen kit is limited by its Pre-S/C intake size/configuration, MAF location and IAT sensor location, charge pipe design, and bracket flex/belt slip.

The Stillen kit is very good at what it does off-the-shelf. But it is not very good for upgrading. You have already maxed the kit out, or you are very close. If you want to keep it and enjoy it, do not chase big power. Build your motor to maximize the air your kit is currently moving. Lowering your CR is not a good way to do that (talk to a few "Stillen S/C" experienced shops). Keep the kit you have already bought and enjoy, keep a CR that is close to stock, upgrade the rods, and get an experienced tuner.

I am in no way telling you what to do, but I've been down this road. And I've seen a few others too. Lowering the CR (on this kit) is just losing power and gaining nothing.

I was getting belt-slip at around 15-16 psi over spinning the blower at 56K rpms with the SI impeller. Look at the amount of belt wrap this kit is designed with on the serp pulley and compare it to other superchargers pushing big psi. Look at the size of the intake going thru the core support compared to other supercharger designs. Look at the MAF/IAT placement compared to other designs.

You have probably already made all of the power you will ever make out of the Stillen kit. The bad part is, now you are going to have a built motor that is capable of much much more. It sounds all too familiar.

I don't want to be the pushy internet guy, so this is the last time I'll say this unless asked. Apologize for getting off-topic.

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Jtranbuilt '08 Z [Jtran PT7075 Single - Fujitsubo - Transgo - Wilwood - TE37SL - BC Racing]

nomodsjk

Hey man just so you know I did the Stillen SC kit with my friend in his driveway and the only thing that we did wrong was we didn't realize that the supercharger came filled with oil and the manual only had one little line saying how it came filled. So we put the bottle of oil that came with the kit into the supercharger because the dip stick read empty but it wasn't and it caused over fill spray onto the strut brace and on the bottom of the hood. Also I got the 9lb pulley and it actually got me up to 10 lbs of boost

ART_Auto

Seriously, how the hell are you guys seeing so much boost? I have the 9lb pulley and im only seeing 7.2psi boost and we have zero boost leaks...

gussyturbo z

Hey same here man I make about 7 or 8 no leaks!

Z&I

How much boost were you getting before the 9 lb pulley ???

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gussyturbo z

Like 6

Z&I

That's low ... should have been 8'ish
How does it run ?

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Nut_N_Much

Bench test the SC, probably not shimmed right. Smoke test intake, they warp due to the fact you can't get same torque spec even all the way around.

Also if your using 25mm turbo smart BOV tighten it all the way down so it opens later in the rpm range to blow off pressure.

ANVQ and I did a lot of the same changes, I added the 928 impeller, drove great till i pushed it into 11.5 boost range and blew the rings out on my motor. Be careful unless your made of money, then have fun with it.

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Did new cool science stuff to the car !!!
http://www.the370z.com/mazoc/99606-z...y-14-17-a.html
http://www.the370z.com/diy-section-d...-w-videos.html

future370zzz

Are all boost readers equal?

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mikey1600

perfectly fine with it, it's still about the supercharger afterall

post up the details here for all to see!

mikey1600

Customs Delay at the moment hoping it still makes it here on Friday (scheduled day according to tracking that it was going to be delivered), about to ring Ralph again from Vivid, he's going to try help me out.

here's to hoping! I've got my tune pencil'd/booked in for Monday and not sure when they can do it again if I can't make then..

Z&I

Hey Mikey !!!

:-) OK to stop chewing your fingernails !!!

Glad you are excited ... You will be happy with your new found power ...
No more flat spot in 3rd gear...hang on to your hat !!!
(and be careful hard shifting into 3rd - it can go sideways just when you least expect it)

My best pass with the stock Stillen was 12.4 @ 116 with a 2.0 60' - not too shabby.

The only thing that failed on me in 30,000+ miles with the kit was the smallest of the idler pulleys...shook itself into severe wobble after about 15K miles.
Replace the SC'r oil on schedule and keep an eye on the hood for belt spray and you will be good to go!

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mikey1600

looks good!

I'm assuming you are looking to use the existing stillen hardware but just upgrading the blower? if you upgraded the blower, what about the charge piping/maf's etc.?

Z&I

Should be and (hoping) it is a complete kit ...
If it is and has been tested it might be the way to go for me.
Just might end up putting the Stillen on my G37!

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