STILLEN 370Z Supercharger System - Announcement!!!

RCZ · 03-19-2010, 11:34 AM

Quote:

This message is hidden because stormcrow is on your ignore list.

So don't bother answering any of my questions.

stormcrow · 03-19-2010, 11:47 AM

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Originally Posted by RCZ

So don't bother answering any of my questions.

Change your pad, bro...you could learn something.

shumby · 03-19-2010, 11:49 AM

real mature RCZ. lol

RCZ · 03-19-2010, 12:15 PM

Quote:

This message is hidden because shumby is on your ignore list.

So back on track.

Any luck getting some 93?

shumby · 03-19-2010, 12:24 PM

ahahahahahaha. i pulled you in. ahahahahaha

Mike · 03-19-2010, 12:28 PM

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Originally Posted by stormcrow

If the V3 uses the same gearing, then it should be as silent. I actually liked how Brando's and my chargers sounded. It wasn't obnoxious to me. Others didn't share my same sentiment, though. I haven't been able to hear the new internally lubricated versions, so I am interested.

Yours were better than a procharger any day!

Kyle@STILLEN · 03-19-2010, 01:07 PM

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Originally Posted by stormcrow

Thanks, sir. Though, I'm sure you've been able to hear it. Does the V3 still have the rattle that the other Vortech blowers had? Not that this is a bad thing, I used to actually find the 'rocks in a blender' sound endearing. Others, not so much.

In my opinion it's pretty quiet. It has that distinctive Vortech whistle to it but I can't hear any gear backlash or anything like that.

stormcrow · 03-19-2010, 01:08 PM

Quote:

Originally Posted by Mike

Yours were better than a procharger any day!

I don't know about that. Jay'z procharger wasn't rattle-y. Granted at 14psi it slung belts at me at 200+ mph.

RCZ · 03-19-2010, 01:10 PM

What about at WOT? Its really hard to get a clear idea from the videos posted so far.

When I first heard about the SC, I was hoping it would sound like a cobra, but since its a different sc, wont sound anything like that. Would have loved the whine.

stormcrow · 03-19-2010, 01:12 PM

Quote:

Originally Posted by Kyle@STILLEN

In my opinion it's pretty quiet. It has that distinctive Vortech whistle to it but I can't hear any gear backlash or anything like that.

It was the gearlash that caused the other. So, without that, it should be good to go. Thanks for reporting back. Would still love to see a vid, though. So, whenever you can...

Kyle@STILLEN · 03-19-2010, 01:45 PM

I haven't been able to spend much time in engineering for the past week or two. I have been buried in numerous other projects and haven't been able to break away to the dyno for awhile now.

Hopefully I can head back out and catch up with the guys next week. Nissan just asked us to build them a race car in less than 6 weeks so I've been trying to organize that build with all of the fabricator's, installer's, and painter's...yes...less than 6 weeks to build a competition ready race car!

RCZ · 03-19-2010, 02:51 PM

Which car for the race car? a GTR?

Phimosis · 03-19-2010, 04:15 PM

RE: noise made by vortech V3 blower; On Youtube there are quite a few extended user videos of V3 blowers on G35's. In car, out of car, stock exhaust, aftermarket exhaust. It's a good starting point. I'm sure Stillen wants to get videos up on Youtube for promotional purposes just as badly as we want to see them.

RE: Parasitic drag of S/C and revving of engine; Revving of engine is based on (net torque) / (moment of inertia). For those that are not familiar with moment of interia, it is the rotational mass and how far from the rotational center the mass is placed. increasing the distance from center increases the torque needed to accelerate the object. In the case of a SC engine, the bulk of the rotational mass is the crank, pistons and rods. The moment of inertia, though is heavily influenced by the flyheel because of its large diameter. The moment of inertia of the supercharger is low because of it's small diameter, so the supercharger's biggest imapact is on net torque, which is (torque made by engine) - (parasitic loss). With all of this said, off idle the SC is not making boost so net torque is lower than stock and decrease the rate of revving. by 2,000 rpm or so the blower will make some boost and net torque will be higher than stock and boost will build to redline, so the increase in net torque over stock will increase to the redline as well. The end result: near stock revability from idle to about 2,500 rpm, then explosive increase in rate of rpms gained all the way to redline. The sensation of bog is not really "bog." That implies that when you open the throttle, net torque decreases. That does not happen. Torque will increase, but increases at low rpm will not be impressive. You think it's bogging because you're expecting 350 lb/ft of torque and 8psi of boost at 2,000 rpm like you get at 5,000 rpm.

stormcrow · 03-19-2010, 04:33 PM

Quote:

Originally Posted by Phimosis

RE: noise made by vortech V3 blower; On Youtube there are quite a few extended user videos of V3 blowers on G35's. In car, out of car, stock exhaust, aftermarket exhaust. It's a good starting point. I'm sure Stillen wants to get videos up on Youtube for promotional purposes just as badly as we want to see them.

RE: Parasitic drag of S/C and revving of engine; Revving of engine is based on (net torque) / (moment of inertia). For those that are not familiar with moment of interia, it is the rotational mass and how far from the rotational center the mass is placed. increasing the distance from center increases the torque needed to accelerate the object. In the case of a SC engine, the bulk of the rotational mass is the crank, pistons and rods. The moment of inertia, though is heavily influenced by the flyheel because of its large diameter. The moment of inertia of the supercharger is low because of it's small diameter, so the supercharger's biggest imapact is on net torque, which is (torque made by engine) - (parasitic loss). With all of this said, off idle the SC is not making boost so net torque is lower than stock and decrease the rate of revving. by 2,000 rpm or so the blower will make some boost and net torque will be higher than stock and boost will build to redline, so the increase in net torque over stock will increase to the redline as well. The end result: near stock revability from idle to about 2,500 rpm, then explosive increase in rate of rpms gained all the way to redline. The sensation of bog is not really "bog." That implies that when you open the throttle, net torque decreases. That does not happen. Torque will increase, but increases at low rpm will not be impressive. You think it's bogging because you're expecting 350 lb/ft of torque and 8psi of boost at 2,000 rpm like you get at 5,000 rpm.

Checking for YouTube videos now. Thanks for the idea. May hit up RedTube while i'm looking at tube sites.

The "bog" (maybe not the best usage of the word, but was trying to portray a mental image) is from when the throttle plate opens until the RPMs start to build. The difference in an N/A car vs the centrifugal SC car is noticable (at least it was on my Vortech'd G35) in this moment as the parasitic drag is at its pinnacle due to no boost.

RCZ · 03-19-2010, 05:56 PM

Quote:

Originally Posted by Phimosis

RE: noise made by vortech V3 blower; On Youtube there are quite a few extended user videos of V3 blowers on G35's. In car, out of car, stock exhaust, aftermarket exhaust. It's a good starting point. I'm sure Stillen wants to get videos up on Youtube for promotional purposes just as badly as we want to see them.

RE: Parasitic drag of S/C and revving of engine; Revving of engine is based on (net torque) / (moment of inertia). For those that are not familiar with moment of interia, it is the rotational mass and how far from the rotational center the mass is placed. increasing the distance from center increases the torque needed to accelerate the object. In the case of a SC engine, the bulk of the rotational mass is the crank, pistons and rods. The moment of inertia, though is heavily influenced by the flyheel because of its large diameter. The moment of inertia of the supercharger is low because of it's small diameter, so the supercharger's biggest imapact is on net torque, which is (torque made by engine) - (parasitic loss). With all of this said, off idle the SC is not making boost so net torque is lower than stock and decrease the rate of revving. by 2,000 rpm or so the blower will make some boost and net torque will be higher than stock and boost will build to redline, so the increase in net torque over stock will increase to the redline as well. The end result: near stock revability from idle to about 2,500 rpm, then explosive increase in rate of rpms gained all the way to redline. The sensation of bog is not really "bog." That implies that when you open the throttle, net torque decreases. That does not happen. Torque will increase, but increases at low rpm will not be impressive. You think it's bogging because you're expecting 350 lb/ft of torque and 8psi of boost at 2,000 rpm like you get at 5,000 rpm.

Phi: Very informative reply and well explained! +1 for you sir. Its not so much that I was expecting 350lb/ft at 2kRPM. My question was more geared towards rev matching and rpm drop between gears. I wanted to know if the fact that there is an extra belt/sc added to the system would cause some parasitic drag, kinda like the A/C system does. I know its definitely not the same, but I guess with the boost being made either way it makes sense that it would shoot to redline explosively. I have lots to learn about superchargers and I'm loving this whole thing. Your answer covered it all and more. Also good call on the youtube, I will check those out. Thanks again.

03-19-2010, 11:49 AM	#198 (permalink)
shumby Captin Canuck Join Date: Dec 2008 Location: with your mom Age: 44 Posts: 6,288 Drives: your sister Rep Power: 236	real mature RCZ. lol __________________ 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

03-19-2010, 12:24 PM	#200 (permalink)
shumby Captin Canuck Join Date: Dec 2008 Location: with your mom Age: 44 Posts: 6,288 Drives: your sister Rep Power: 236	ahahahahahaha. i pulled you in. ahahahahaha __________________ 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

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03-19-2010, 01:10 PM	#204 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1119	What about at WOT? Its really hard to get a clear idea from the videos posted so far. When I first heard about the SC, I was hoping it would sound like a cobra, but since its a different sc, wont sound anything like that. Would have loved the whine.

03-19-2010, 01:45 PM	#206 (permalink)
Kyle@STILLEN The370Z.com Sponsor Join Date: Dec 2008 Location: Newport Beach Posts: 626 Drives: Toyota Tundra Rep Power: 306	I haven't been able to spend much time in engineering for the past week or two. I have been buried in numerous other projects and haven't been able to break away to the dyno for awhile now. Hopefully I can head back out and catch up with the guys next week. Nissan just asked us to build them a race car in less than 6 weeks so I've been trying to organize that build with all of the fabricator's, installer's, and painter's...yes...less than 6 weeks to build a competition ready race car!

03-19-2010, 02:51 PM	#207 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1119	Which car for the race car? a GTR?

03-19-2010, 04:15 PM	#208 (permalink)
Phimosis Enthusiast Member Join Date: May 2009 Location: Oildale, CA Posts: 412 Drives: 2013 911 4S Rep Power: 416	RE: noise made by vortech V3 blower; On Youtube there are quite a few extended user videos of V3 blowers on G35's. In car, out of car, stock exhaust, aftermarket exhaust. It's a good starting point. I'm sure Stillen wants to get videos up on Youtube for promotional purposes just as badly as we want to see them. RE: Parasitic drag of S/C and revving of engine; Revving of engine is based on (net torque) / (moment of inertia). For those that are not familiar with moment of interia, it is the rotational mass and how far from the rotational center the mass is placed. increasing the distance from center increases the torque needed to accelerate the object. In the case of a SC engine, the bulk of the rotational mass is the crank, pistons and rods. The moment of inertia, though is heavily influenced by the flyheel because of its large diameter. The moment of inertia of the supercharger is low because of it's small diameter, so the supercharger's biggest imapact is on net torque, which is (torque made by engine) - (parasitic loss). With all of this said, off idle the SC is not making boost so net torque is lower than stock and decrease the rate of revving. by 2,000 rpm or so the blower will make some boost and net torque will be higher than stock and boost will build to redline, so the increase in net torque over stock will increase to the redline as well. The end result: near stock revability from idle to about 2,500 rpm, then explosive increase in rate of rpms gained all the way to redline. The sensation of bog is not really "bog." That implies that when you open the throttle, net torque decreases. That does not happen. Torque will increase, but increases at low rpm will not be impressive. You think it's bogging because you're expecting 350 lb/ft of torque and 8psi of boost at 2,000 rpm like you get at 5,000 rpm.