So just ordered my Stillen SC

Z&I

IPP isn't doing the install, just the rebuild ... However, my motor is getting the grand tour of the countryside courtesy of the trucking company !

My car is now sitting in my driveway with it's intestines strewn about the interior.

With a 5 week wait for the motor to make it's way back to NJ ... the shop elected to flat bed it back to me to conserve shop space until the motor gets back from Texas ...

I sure hope it doesn't develop a southern drawl down there in Texas ...

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gussyturbo z

Like 6

Pro4Jackster

Do you think 9:1 pistons are the best choice for a supercharged motor? I'm no engine builder, but the ones I've seen built at JTran with lower CRs lose a lot of power. And with a supercharger, you cannot just turn up the boost to compensate like on a turbo. You are almost maxed out on CFMs with the Stillen Kit as is. Just something to think about. You could be giving up a substantial amount of power.

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

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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Z&I

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

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Z&I

oops ... sorry

Went back and read the thread again ... somehow I got the idea that you were upgrading the impeller as well.
Hope I didn't steer the thread off topic too much.

I was real happy with my Stillen SC'r and drove the car daily for 3 years (even thru the winters here in NJ).
Tracked it a few times too.

Now I'm intersted in getting it in to the mid 11's.

Have a great time with yours !

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mikey1600

All good! keep us updated with your build as well, would be interesting to see the extra boost through the unit or even the upgrade to the V7.

I'll be going e85 eventually, have 3 stations ranging from 5-15 mins from my home, it is my daily but having stations that close and the 370z tank is quite big shouldn't be a problem really.

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]

Z&I

Awesome reply !!! The truth never really hurts but it sure 'nuff always does help.

Tho' it has served me well, I might have outgrown the Stillen ...

Want to stick with Supercharger rather than switch over to Turbo...
I'm an open book now that I'm forced to build the motor ... what would you recommend ???

Found a post here about CiN with the V7 (kit?) ... have the link on my home computer ..l will send that off to you tonight.

Don't want to get off topic here too much unless everybody is OK with it.

Thanks

Thanks

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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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Z&I

Here is the link posted on this Forum for the CiN V7 Sc'r for the 370z: as usual > some pro's and con's

Have you seen CIN Motorsports 370Z Supercharger kit

Good ??? Bad ??? So So ??? Thoughts ???

I've got a call in to them and am awaiting a response ...

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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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