STILLEN 370Z Supercharger System - Announcement!!!

Slynky · 09-08-2010, 01:22 PM

What does this thing cost, installed...anyway...?

Chris@FsP · 09-08-2010, 01:26 PM

Those numbers are def a little low. When we ran their newest tune on a DJ, we came up with 389whp/290wtq, which is almost identical to our custom tune on a different car (although the ambient conditions on our custom tune were much worse than when we dyno'd the Stillen tune).

Q8y_drifter · 09-08-2010, 01:54 PM

shumby · 09-08-2010, 03:23 PM

^^^ not dumb at all. You will see a small increase in HP and huge increas in TQ. I am still surprised that stillen has such low TQ number compaired to the other SC kit out there. with a 6 psi pully it makes 350tq

weiboy718 · 09-08-2010, 04:38 PM

Alright guys, I'm gonna take my car to the same place where tomavone got his car dyno at tomorrow. Let's see what's the differences is. note, I only have CBE.

Lug · 09-08-2010, 05:28 PM

Quote:

Originally Posted by weiboy718

Alright guys, I'm gonna take my car to the same place where tomavone got his car dyno at tomorrow. Let's see what's the differences is. note, I only have CBE.

More data = better decisions. FTW!

DannyGT · 09-08-2010, 05:40 PM

But wait, what was the delta??? Sorry for being lazy but did you do a baseline run? At the end of the day, thats all that matters. Maybe your car stock was 250-260whp? Or maybe Stillen sucks?

i kiddd i kidddd...

tomnavone · 09-08-2010, 05:49 PM

Quote:

Originally Posted by DannyGT

But wait, what was the delta??? Sorry for being lazy but did you do a baseline run? At the end of the day, thats all that matters. Maybe your car stock was 250-260whp? Or maybe Stillen sucks?

i kiddd i kidddd...

my baseline was 274. With Exhaust hfc and intake 302. with supercharger, exhaust and hfc 376. Stillens baseline was 276. Stillens numbers with exhaust and supercharger 437. My torque with the supercharger is 299 Stillens is 343. Both done on a dyno jet same temps same elevation.

RCZ · 09-08-2010, 06:54 PM

You guys are getting STD numbers right? Just checking...might be why you're off by so much.

Zsteve · 09-08-2010, 08:41 PM

Quote:

Originally Posted by RCZ

You guys are getting STD numbers right? Just checking...might be why you're off by so much.

How is a dyno giving them STDs?

tomnavone · 09-08-2010, 10:17 PM

Quote:

Originally Posted by RCZ

You guys are getting STD numbers right? Just checking...might be why you're off by so much.

My numbers are sae, which most consider the most Accuate and widely accepted form of measurement. From my understanding std reads higher by 2 - 4%. The diference between sae and std = less than 10 hp difference in this case.

RCZ · 09-09-2010, 08:08 AM

Quote:

Originally Posted by tomnavone

My numbers are sae, which most consider the most Accuate and widely accepted form of measurement. From my understanding std reads higher by 2 - 4%. The diference between sae and std = less than 10 hp difference in this case.

Umm, the difference can be higher than 2-4%. BOTH Stillen and GTM advertised STD numbers, not SAE. In my case there was around a 20hp difference between SAE and STD.

Some of you guys that are right around 400 or a little over SAE will end up around 420, which isnt as unacceptably far away from Stillen advertised results as it seemed before...

tomnavone · 09-09-2010, 09:04 AM

Quote:

Originally Posted by RCZ

Umm, the difference can be higher than 2-4%. BOTH Stillen and GTM advertised STD numbers, not SAE. In my case there was around a 20hp difference between SAE and STD.

Some of you guys that are right around 400 or a little over SAE will end up around 420, which isnt as unacceptably far away from Stillen advertised results as it seemed before...

Umm, how can the differnece be higher than 2-4%? What math are u using? Stillen math?

RCZ · 09-09-2010, 07:33 PM

Quote:

Originally Posted by tomnavone

Umm, how can the differnece be higher than 2-4%? What math are u using? Stillen math?

The "SAE Air Correction Factor" which is used by all the dyno guys is:

SAE CF = 1.18[Ps/(Pm-Pv)][sqrt(Tm/Ts)]-0.18
(sqrt = square root)

This formula is right out of SAE Paper #J1349 (revision June 1990), and is the latest form of the air correction formula. SAE assumes 15% frictional loss within the engine, which is probably close for a piston engine. NOTE: this is NOT the losses from the crankshaft to the rear wheels, that is a different loss.

Ps = standard pressure
Pm = measured pressure (barometric pressure)
Pv = vapor pressure of water (relates to RH%)
Ts = standard temperature
Tm = measured temperature

The SAE baseline values are:
------------------------------------
Ps = 29.235 inHg
Ts = 77.0 deg F (534 deg R)
Pv = 0 inHg (dry air, no humidity)

Pv will not be 0 inHg during a dyno run, but will equate to the vapor pressure of water vapor in the air, which is a function of humidity.

P units = inHg
T units = deg R (deg F + 460). If not in deg R, you will get a wrong answer!

So, the CF will depend on where the actual air temperature, pressure and humidity is with respect the standard values listed above.

The CF can be less than, or more than 1.00. If you tested your Z06 on a dyno on a day when T = 77 deg F, P = 29.325 and the RH = 0% in the shop where the dyno was, then the CF would be exactly 1.00. As you can see, there are MANY combinations of T, P and RH that will give you the same CF.

Note, the Pv (vapor pressure of water) defines the RH% and is subtracted from the atmospheric pressure because the water vapor "displaces" that much pressure, and essentially makes it equivalent dry air (RH = 0%) at the resulting pressure of Pm - Pv.

BTW, the pressure values in the formula has more effect on HP than the temperature values (square root of a ratio)

Source: z06vette.com

_______________________

Yes Stillen Math. My correction was of 5.3% according to the dynojet.

You know, with an attitude like yours, I'm glad you're having so many problems.

rednek01 · 09-10-2010, 08:50 AM

Quote:

Originally Posted by tomnavone

Umm, how can the differnece be higher than 2-4%? What math are u using? Stillen math?

That is awesome I gotta use that now!

09-08-2010, 01:22 PM	#1 (permalink)
Slynky Track Member Join Date: Oct 2009 Location: McDonough, GA Posts: 595 Drives: 2010 Red 370Z T/S/N Rep Power: 18	What does this thing cost, installed...anyway...? __________________ A veteran is someone who, at one point in their life, wrote a blank check made payable to "The United States of America," for an amount of "up to and including my life."

09-08-2010, 01:54 PM	#3 (permalink)
Q8y_drifter Enthusiast Member Join Date: Mar 2010 Location: Kuwait Posts: 306 Drives: 08 Infiniti G35 5AT Rep Power: 17	__________________ 08 G35 5AT Sedan \| Stillen CBE \| Invidia HFC \| Injen CAI \| Uprev Tune \| Akebono BBK \| Tanabe Coilovers \| Hotchkis Sway Bars \| GTSpec FSB \| Black Headlights & Grille \| Volk GT-F Wheels \| Hankook V12 Evo Tires

09-08-2010, 03:23 PM	#4 (permalink)
shumby Captin Canuck Join Date: Dec 2008 Location: with your mom Age: 46 Posts: 6,288 Drives: your sister Rep Power: 238	^^^ not dumb at all. You will see a small increase in HP and huge increas in TQ. I am still surprised that stillen has such low TQ number compaired to the other SC kit out there. with a 6 psi pully it makes 350tq __________________ Originally Posted by SAM@GTM Engine detonation is not normal and it should never never happen, and whoever told that need to do something else for living . Sam

09-08-2010, 05:40 PM	#7 (permalink)
DannyGT Track Member Join Date: Jan 2009 Location: Jersey Posts: 919 Drives: 370Z (SOLD) Rep Power: 281	But wait, what was the delta??? Sorry for being lazy but did you do a baseline run? At the end of the day, thats all that matters. Maybe your car stock was 250-260whp? Or maybe Stillen sucks? i kiddd i kidddd... __________________ Performance GTM Stage 1 SC, GTM Res.Test Pipes, Invidia Gemini Exhaust, GTM HD Oil Cooler Wheels & Suspension AME Tracer TM02's 19x9.5F 19x10.5R w/ 265x35F & 305x30R, Hotchkis Sways, BC (BR) Racing Coilovers (Car Sold)

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
GT Motorsports: 370Z Supercharger system development	SAM@GTM	Forced Induction	1396	02-02-2014 10:54 PM
STILLEN 370Z Dual Exhaust System w/pricing	AK370Z	STILLEN	25	01-03-2011 07:49 PM
Preparation for the STILLEN supercharger	Kyle@STILLEN	Forced Induction	1087	03-13-2010 05:59 AM
Stillen Supercharger estimates???	NewYorkJon34	Forced Induction	454	01-22-2010 11:05 PM
Will Stillen Supercharger & G3 intakes Connect?	NewYorkJon34	Forced Induction	23	10-31-2009 12:09 AM

09-08-2010, 01:26 PM	#2 (permalink)
Chris@FsP Enthusiast Member Join Date: Dec 2009 Location: Tulsa, OK Posts: 430 Drives: 2008 350Z TT Rep Power: 370	Those numbers are def a little low. When we ran their newest tune on a DJ, we came up with 389whp/290wtq, which is almost identical to our custom tune on a different car (although the ambient conditions on our custom tune were much worse than when we dyno'd the Stillen tune).

09-08-2010, 04:38 PM	#5 (permalink)
weiboy718 Track Member Join Date: May 2010 Location: Bay Area Posts: 923 Drives: Infiniti G37 Rep Power: 18	Alright guys, I'm gonna take my car to the same place where tomavone got his car dyno at tomorrow. Let's see what's the differences is. note, I only have CBE.

09-08-2010, 06:54 PM	#9 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1120	You guys are getting STD numbers right? Just checking...might be why you're off by so much.