STILLEN 370Z Supercharger System - Announcement!!!

theDreamer · 08-16-2010, 08:35 PM

The loss of psi is from the long tube headers, there have only been two supercharger installs with long tube headers, both of which are GTM kits. Mine is doing very well, but that is for other threads.

Lets not spread false information.

Osiris · 08-16-2010, 09:24 PM

Quote:

Originally Posted by tomnavone

Its been over three weeks and they cant figure out my tune. Id rather run 6 psi and have my car run than 8psi and not run.

3 weeks? that's it? c'mon, i'm at week 7 without a car now.

tomnavone · 08-16-2010, 09:32 PM

Quote:

Originally Posted by Osiris

3 weeks? that's it? c'mon, i'm at week 7 without a car now.

That sucks sorry to hear that. i got my car back 7/7/10 so im at 5 weeks. Any word from stillen regarding your car? I was told last week a fix was coming soon and not to drive the car unless its my everyday car then its ok but they dont know what damage driving the car will do.

Osiris · 08-16-2010, 10:10 PM

last i heard uprev was going onsite today to fix the remainder issues. Will try to get update tomorrow.

LateralG'z · 08-16-2010, 10:27 PM

Quote:

Originally Posted by tomnavone

These are the results from my dyno before and after the stillen supercharger. My mods include stillen cbe and berk hfc. Unless im reading this dyno wrong im short of the advertised gains by stillen by a long shot.

You are also close to there ambient temps and similar dyno conditions

tomnavone · 08-16-2010, 10:30 PM

Quote:

Originally Posted by LateralG'z

You are also close to there ambient temps and similar dyno conditions

same elevation also san jose 87 feet stillen 101 feet above sea level. Stillens base line dyno was 95f and there dyno after supercharger was 65f ambient temps. My dyno temp after supercharger was 69f

Kyle@STILLEN · 08-17-2010, 12:03 PM

Just want to give everyone an early morning update:

As planned Jared flew in yesterday morning and I picked him up at the airport at 9:00 A.M. Unfortunately he was feeling under the weather and was unable to work at the shop yesterday and went straight to the hotel to enter a Nyquil coma. I picked him up this morning and he was feeling much better and was able to get to work on the car. So, we lost a day yesterday but we're back up and running today. Hopefully we will have more updates soon.

Nitex · 08-17-2010, 12:49 PM

Quote:

Originally Posted by Kyle@STILLEN

Just want to give everyone an early morning update:

As planned Jared flew in yesterday morning and I picked him up at the airport at 9:00 A.M. Unfortunately he was feeling under the weather and was unable to work at the shop yesterday and went straight to the hotel to enter a Nyquil coma. I picked him up this morning and he was feeling much better and was able to get to work on the car. So, we lost a day yesterday but we're back up and running today. Hopefully we will have more updates soon.

Right on Kyle, in for updates.

Kastley85891 · 08-17-2010, 01:40 PM

Quote:

Originally Posted by Kyle@STILLEN

Unfortunately he was feeling under the weather and was unable to work at the shop yesterday and went straight to the hotel to enter a Nyquil coma.

what a pussy - man it up bitch

Jamaica · 08-17-2010, 02:50 PM

Quote:

Originally Posted by Kastley85891

what a pussy - man it up bitch

thats what she said.

Liquid_G · 08-17-2010, 03:15 PM

Quote:

Originally Posted by NYBladeZ

Looks like Stillen is starting to pull ahead in the S/C race. How will GTM respond? Congrats on your setup, POST DYNOS!

wut?

Phimosis · 08-17-2010, 03:16 PM

Quote:

Originally Posted by theDreamer

The loss of psi is from the long tube headers, there have only been two supercharger installs with long tube headers, both of which are GTM kits. Mine is doing very well, but that is for other threads.

Lets not spread false information.

About spreading false information: Headers don't cause supercharged cars to lose boost.

From a physics standpoint, increasing exhaust backpressure makes it harder to get exahust gas out, which makes it harder to get fresh air in. If you apply resistance to the outlet side of a compressor, the pressure goes up. Reducing the resistance increases volume of airflow and decreases pressure. Think of the tire compressor at a gas station. When the valve is shut, it is flowing zero cubic feet per minute and making 150 psi. When you open the valve and it's flowing air into your tire, it's flowing, say 10 cfm and making 35 psi because of the resistance in your tire. When you open the valve and let it blow into the atmosphere, it's flowing, say 20 cfm, but making 0 psi of pressure.

Now, cars make hp by burning gasoline with air at a fixed ratio. Having air under pressure doesn't let you burn more gas and make more power. Having more AIR let's you burn more gas and make more power. Boost helps you get more air in, but like in the analogy above, if there is less resistance, like blowing the tire filler into the atmoshpere, there will be less boost, but more total air moved, which will give more power.

So, long tube headers are NOT decreasing boost (with the implication being that if you have less boost, you are making less power). Headers simply decrease the outflow resistance so the boost level is whatever your compressor can make against the closed intake valves.

In the case of the GTM supercharger, they are using a smaller unit that reaches max boost and flow characteristics at a lower RPM, but then at higher rpm, the unit does not increase airflow in the linear fashion that engine consumes air. This leads to a drop off in boost. It gives a nice fat torque curve that falls off at high rpm, similar to what you see on most turbo cars. Then, when you couple that with a free flowing exhaust, the boost numbers are lower than predicted in the higher rpm range, but will likely be same as predicted in the lower and mid range.

GTM's higher stages of their supercharger kit use a larger compressor and you probably won't see the fall off in boost at high rpm (even with headers), but the torque curve will probably look more like the unit that Stillen has developed.

theDreamer · 08-17-2010, 03:28 PM

Never mind, I am leaving this thread as there is just to much wrong information from all sides.
Stillen, hope you and Uprev can resolve your issue and start pumping out more kits quickly.

racerxj17 · 08-17-2010, 06:03 PM

Quote:

Originally Posted by Phimosis

About spreading false information: Headers don't cause supercharged cars to lose boost.

From a physics standpoint, increasing exhaust backpressure makes it harder to get exahust gas out, which makes it harder to get fresh air in. If you apply resistance to the outlet side of a compressor, the pressure goes up. Reducing the resistance increases volume of airflow and decreases pressure. Think of the tire compressor at a gas station. When the valve is shut, it is flowing zero cubic feet per minute and making 150 psi. When you open the valve and it's flowing air into your tire, it's flowing, say 10 cfm and making 35 psi because of the resistance in your tire. When you open the valve and let it blow into the atmosphere, it's flowing, say 20 cfm, but making 0 psi of pressure.

Now, cars make hp by burning gasoline with air at a fixed ratio. Having air under pressure doesn't let you burn more gas and make more power. Having more AIR let's you burn more gas and make more power. Boost helps you get more air in, but like in the analogy above, if there is less resistance, like blowing the tire filler into the atmoshpere, there will be less boost, but more total air moved, which will give more power.

So, long tube headers are NOT decreasing boost (with the implication being that if you have less boost, you are making less power). Headers simply decrease the outflow resistance so the boost level is whatever your compressor can make against the closed intake valves.

In the case of the GTM supercharger, they are using a smaller unit that reaches max boost and flow characteristics at a lower RPM, but then at higher rpm, the unit does not increase airflow in the linear fashion that engine consumes air. This leads to a drop off in boost. It gives a nice fat torque curve that falls off at high rpm, similar to what you see on most turbo cars. Then, when you couple that with a free flowing exhaust, the boost numbers are lower than predicted in the higher rpm range, but will likely be same as predicted in the lower and mid range.

GTM's higher stages of their supercharger kit use a larger compressor and you probably won't see the fall off in boost at high rpm (even with headers), but the torque curve will probably look more like the unit that Stillen has developed.

this+++

i have used the same blower used in the GTM kit on my old tacoma 4.0. when i installed headers, i did drop about 1.5 psi, but i also gained 15+ rwhp from 2500 rpm and up.

i generally stay out of these types of arguments, because in general people are to ill informed on how a supercharger actually works.......the people that DO know the above, already know it

RCZ · 08-17-2010, 06:27 PM

and I got yelled at when I posted about flow vs psi in Shumby's thread..

08-16-2010, 08:35 PM	#1366 (permalink)
theDreamer A True Z Fanatic Join Date: Feb 2009 Location: Texas Posts: 30,879 Drives: 370z Rep Power: 4210	The loss of psi is from the long tube headers, there have only been two supercharger installs with long tube headers, both of which are GTM kits. Mine is doing very well, but that is for other threads. Lets not spread false information. __________________ theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN theDreamer's Silvia // URAS // GREDDY Houston Zs // Facebook // Twitter // Instagram

08-16-2010, 10:10 PM	#1369 (permalink)
Osiris A True Z Fanatic Join Date: Mar 2009 Location: http://www.cfzclub.com/ Posts: 1,524 Drives: Angry Rep Power: 19	last i heard uprev was going onsite today to fix the remainder issues. Will try to get update tomorrow. __________________ ^^^^^^^^^Like our Facebook!^^^^^^^^^

08-17-2010, 03:28 PM	#1378 (permalink)
theDreamer A True Z Fanatic Join Date: Feb 2009 Location: Texas Posts: 30,879 Drives: 370z Rep Power: 4210	Never mind, I am leaving this thread as there is just to much wrong information from all sides. Stillen, hope you and Uprev can resolve your issue and start pumping out more kits quickly. __________________ theDreamer's Z // Fast Intentions // Uprev // GTM // HKS // TEIN theDreamer's Silvia // URAS // GREDDY Houston Zs // Facebook // Twitter // Instagram Last edited by theDreamer; 08-17-2010 at 03:34 PM.

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08-17-2010, 12:03 PM	#1372 (permalink)
Kyle@STILLEN The370Z.com Sponsor Join Date: Dec 2008 Location: Newport Beach Posts: 626 Drives: Toyota Tundra Rep Power: 306	Just want to give everyone an early morning update: As planned Jared flew in yesterday morning and I picked him up at the airport at 9:00 A.M. Unfortunately he was feeling under the weather and was unable to work at the shop yesterday and went straight to the hotel to enter a Nyquil coma. I picked him up this morning and he was feeling much better and was able to get to work on the car. So, we lost a day yesterday but we're back up and running today. Hopefully we will have more updates soon.

08-17-2010, 06:27 PM	#1380 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1119	and I got yelled at when I posted about flow vs psi in Shumby's thread..