Nissan 370Z Forum - STILLEN 370Z Supercharger System

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Nissan 370Z Forum (http://www.the370z.com/)

- Forced Induction (http://www.the370z.com/forced-induction/)

- - STILLEN 370Z Supercharger System - Announcement!!! (http://www.the370z.com/forced-induction/15836-stillen-370z-supercharger-system-announcement.html)

Push370zzz

11-03-2010 02:18 AM

Quote:

Originally Posted by Buzzlitonian (Post 793788)

Yes. It looks to me you are right. This one is for Rotational Horsepower.

Lowers my Engine HP numbers by about 40 on each (if peak is 6700 - 6900 rpm).
Some could consider Horsepower is actually obtained in a quarter mile run matched with the weight of a car and how fast it is going when it hits the trap in real world conditions.

HP = weight x (velocity/234)cubed. The Dyno is Static.

Thanks for the post on that. I don't know where the Tech guy got the .8
I bought it though.

The Tech guy probably didn't have to take a lot of physics for his engineering degree ;)

Edit: I use that equation you posted for my hp/weight based trap speed calculators...incredibly accurate, neat math trick used in it to factor in drag. I was able to confirm this when it actually calculated the top speed of the Bugatti Veyron SS within about 1mph based on the stock ones stats (since drag & frontal area would be very close).

Q8y_drifter

11-03-2010 05:29 AM

That formula the tech gave you was to obtain a rough estimate for your BHP since you already have WHP.

G Fo12ce

11-03-2010 09:12 AM

http://www.the370z.com/attachments/f...-10-29-43-.jpg
Well done car. I like the PW Amuse, Gunmetal BBS combo.

Red__Zed

11-03-2010 09:37 AM

Quote:

Originally Posted by Buzzlitonian (Post 793788)

He wAs probably assuming 20% drivetrain losses.

RCZ	11-03-2010 09:42 AM

^ Exactly, thats a little high for a RWD system though. More like 15% normally (on dynojets). By his math I make like 570bhp hahaha, so far from the truth.

Q8y_drifter

11-03-2010 09:46 AM

^ you're making 456whp?

RCZ	11-03-2010 09:46 AM

455

Q8y_drifter

11-03-2010 10:20 AM

I'd say 17% is a more accurate measure if your whp was measured on a Dynojet. Stock G37 coupe is rated at 330bhp. Almost every dyno for a stock G37 on a DJ is about 275whp. That's approx 17% loss ( 275whp / 0.83% = 331bhp)

RCZ	11-03-2010 11:06 AM

Yes agreed. I'm being more conservative though. You gotta take all these numbers as a general indicator rather than a fact. Too many variables can affect results. So if you want to be more realistic, whenever you come to a conclusion that sounds accurate, subtract out the "ricer math factor" and then subtract some more...after that you might be in the ballpark.

spearfish25

11-03-2010 11:26 AM

Quote:

Originally Posted by xyz (Post 789568)

Not sure if it was the same article, but I read 0-60 in 4.5 secs, and that's 0.7 secs quicker than the stock 370z previously tested by the magazine. 12.8 @ 133 for the quarter mile.

That should read 12.8 @ 113. 133mph would be insanely fast.

Push370zzz

11-03-2010 11:42 AM

Quote:

Originally Posted by spearfish25 (Post 794073)

That should read 12.8 @ 113. 133mph would be insanely fast.

Agreed...but how the hell do they manage to only run high 12's? My Stillen SC 370z in Forza 3 runs mid 11's with slicks and around 520 crank hp :icon14:

m4a1mustang

11-03-2010 11:43 AM

Quote:

Originally Posted by smashwebs (Post 794097)

Agreed...but how the hell do they manage to only run high 12's? My Stillen SC 370z in Forza 3 runs mid 11's with slicks and around 520 crank hp :icon14:

Traction probably. I should be running mid 12s but traction, I does not have it. :icon17:

Q8y_drifter

11-03-2010 02:19 PM

Did the test car in the article run slicks?

I wish Forza would show a full time slip rather than just 1/4m time.

RCZ	11-03-2010 03:20 PM

Quote:

Originally Posted by Q8y_drifter (Post 794327)

Did the test car in the article run slicks?

I wish Forza would show a full time slip rather than just 1/4m time.

If you go into your setup and hit "Benchmark" it gives you a 0-60 and more info too I think.

Push370zzz

11-03-2010 03:25 PM

Quote:

Originally Posted by RCZ (Post 794461)

If you go into your setup and hit "Benchmark" it gives you a 0-60 and more info too I think.

I believe it only gives you 0-60, 0-100, and top speed for the acceleration figures

RCZ	11-03-2010 03:41 PM

I think I might go try it out and see how it actually compares to my car.

m4a1mustang

11-03-2010 03:42 PM

Just read the Road & Track blurb on Stillen's test mule and they cited the large amount of negative camber in the rear as a factor that hurt off-the-line grip.

370Zsteve

11-04-2010 09:08 AM

Quote:

Originally Posted by RCZ (Post 793952)

455

Well on one dyno, anyway.

Q8y_drifter

11-04-2010 09:12 AM

Quote:

Originally Posted by RCZ (Post 794506)

I think I might go try it out and see how it actually compares to my car.

Make sure you leave the weight stock. My first "mod" for any car in Forza is to fully strip it :P

RCZ	11-04-2010 09:29 AM

^ I was kinda kidding, I know forza physics are good, but they are still a little too "perfect". I guess it would mathematically give you a ideal scenario of weight v power with some form of tire slip. I'll try it out later fwiw.

xyz	11-04-2010 01:44 PM

Quote:

Originally Posted by spearfish25 (Post 794073)

That should read 12.8 @ 113. 133mph would be insanely fast.

Lol, yea . . . sorry for the typo . . . fixed! Thanks.

ImportConvert

11-08-2010 11:23 AM

Quote:

Originally Posted by m4a1mustang (Post 794510)

Just read the Road & Track blurb on Stillen's test mule and they cited the large amount of negative camber in the rear as a factor that hurt off-the-line grip.

So? It got 0-60 a good bit quicker and only managed to drop a touch in the 1/4 and had a very weak trap-speed. No amount of "traction limitation" is going to account for this showing.

Nitex

11-09-2010 04:08 PM

^^ Am i missing something here? Do you have the Stillen SC kit, and your saying you ran a faster 0-60 but slower 1/4 and trap? Weird... Can someone confirm this?

Phimosis

11-09-2010 06:30 PM

Quote:

Originally Posted by Nitex (Post 803139)

^^ Am i missing something here? Do you have the Stillen SC kit, and your saying you ran a faster 0-60 but slower 1/4 and trap? Weird... Can someone confirm this?

It trapped 113. I'm guessing that was in SoCal and in the summer. 113 is pretty good. Last summer with bolt-ons, but pre-supercharger, my highest trap was 104 mph. It's also 1/2 second quicker in the quarter mile than what all the car magazines were able to get.

The flip side though, is that in 2004 motortrend tested the z51 c6 corvette and it ran a 12.7 @ 112 with 400 engine hp. That's 115 hp less than what Stillen is claiming from their press car.

ImportConvert

11-09-2010 11:37 PM

Quote:

Originally Posted by Phimosis (Post 803330)

Exactly. The 'vette weighs about the same as a Z, and ran about the same time as the "supposed" 515bhp Z. That Z does NOT! make 515bhp unless the driveline is sucking up 150hp. Sorry. Not happening with those numbers unless they slammed the brakes on at the 1000' mark.

Lug	11-10-2010 03:32 PM

People are comparing results from different magazines. I've seen MT get a 4.6 on the 370Z vs. 4.9 from C&D vs. 5.1 from Edmunds & others. That's a 1/2 second swing on the exact same car. This is all before you account for different cars with different traction, etc. You just can't cross-compare like that with any reasonable accuracy.

spearfish25

11-10-2010 03:43 PM

Pretty sure the 4.6 was right :)

Zsteve

11-10-2010 04:00 PM

any stock Z on the street will be hard pressed to get the 4.6 thats claimed. More like 5. That 4.6 was on a well prepped track Im sure. Most cars have a hard time hitting the quoted mark.

Z eliminator

11-10-2010 04:34 PM

I have no problems running 12.8009. with my 7 AT with bolt on's and its on the stock 19 inch street tires's

Nitex

11-10-2010 04:41 PM

^ so we have NA Z's running within a tenth of the SC'd ones... Somethings off.... either the drivers in the SC'd Z are full of fail. Or we just do not have an accurate representation of a SC'd 370 1/4 mile.

LateralG'z

11-10-2010 05:05 PM

Once I upgrade my CSC and clutch I will 1/4 mile mine and post the results

christian370z

11-10-2010 05:12 PM

Since one of the strengths to the Stillen kit is the room for upgrading by being able to make more boost than the initial kit setup and therefore power with the Vortech unit, how much more power could it efficiently make?

LateralG'z

11-10-2010 05:20 PM

Quote:

Originally Posted by christian370z (Post 804628)

The V3 stillen spec'd is rated for max of 22 psi. Not sure what that equates too

christian370z

11-10-2010 05:33 PM

Oh wow, so it is safe to say it can probably push enough power to run into the danger zone on a stock VQ37 then. Thanks Lateral!

Lug	11-10-2010 05:40 PM

Quote:

Originally Posted by christian370z (Post 804654)

Oh wow, so it is safe to say it can probably push enough power to run into the danger zone on a stock VQ37 then. Thanks Lateral!

Probably enough to push two pistons out the hood, 2 out the side of the engine housing, and two through the oil pan. :D

LateralG'z

11-10-2010 07:52 PM

Quote:

Originally Posted by christian370z (Post 804654)

Oh wow, so it is safe to say it can probably push enough power to run into the danger zone on a stock VQ37 then. Thanks Lateral!

Your welcome

RCZ	11-11-2010 10:37 AM

Quote:

Originally Posted by Lug (Post 804662)

Probably enough to push two pistons out the hood, 2 out the side of the engine housing, and two through the oil pan. :D

^ This

Chris@FsP

11-11-2010 10:49 AM

Yeah, the V3 is barely getting into its efficiency range at stock boost levels. That's why the tq numbers are less than GTM's Stage 1 kit.

With a built motor and a higher psi pulley, I think the Stillen kit would really shine. And that's not to say anything against the GTM kit, as they have multiple blower options to get you where you want to be.

Z eliminator

11-11-2010 02:37 PM

What im saying is that im faster than the stillen sc.
My time was 12.8009. Who know's what there time really was 12.8????
It could have been a 12.899 J naust 370 z with bolt on's (6 mt) is running 12.300)
1/2 a second faster than the stillen SC car.

Nitex

11-11-2010 03:02 PM

yeah.. put Jnaut in the SCd Z and then see what happens.

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