SZ Clutch & Flywheel Upgrades + Bearing!

Seb@SZ · 08-11-2010, 10:48 PM

Hi guys

Over the last month or two we've been working to get our drive-train upgrades to the Z34\V36 community along with the 07-08 Z33s.

For those that have never seen or heard about our unique flywheels here's some info.

Our flywheels utilize a patented "segmented" heat shield system. Traditional heat shields warp because of the uneven heat produced by a slipping clutch. Just like a car going around in a circle, the outside tires go faster than the inside tires, the clutch disc slides faster around the outside of the flywheel than it does around the inside. The faster moving outside gets hotter than the inside. Because metal expands more the hotter it gets, the outside of the heat shield expands more than the inside. Traditional heat shields are made of one piece metal rings, so when the outside expands more than the inside, the only thing the shield can do is warp. The segmented heat shields are not connected so they can expand and contract without warping. A warped heat shield causes the clutch to slip, which causes more heat and more warpage.

Example of a warped shield found on other aluminum flywheels.

Our Billet Flywheels are dynamically balanced after CNC machining. Other flywheel manufactures assume that since they CNC their flywheels it comes off the machine fully balanced. This would be true assuming the density of the aluminum is constant throughout the part. Unfortunately even the best billet material is not evenly dense throughout and the starter ring gears are never perfect.

SZ Flywheels are also fully rebuildable for the life of the car. We've been using this flywheel design for over 8 years now with excellent success!

On the Z33 like the Z34 the flywheels used from the factory are a dual mass design. This allowed the flywheel to absorb noise and vibrations. Since aluminum transfers noise easily we focused on designing a performance flywheel that was still quiet while achieving less weight. Less weight off the crank provides freed up power and a quicker, more responsive revving engine.

We provide 5 different clutch options tailored to the car's power and driver's goals. Our entry level Sport Street clutch features a higher clamp load pressure plate able to hold 500 BHP with an organic clutch disc (OE-Style). This is perfect for someone staying NA, or for those making below 450 whp. The Sport 6-Puck we offer uses the same pressure plate but a 6-Puck disc for those looking to drag race. The 6-Puck disc still offers a smooth clutch engagement with the ability to hold a little more power and take abuse.

Our Max Street uses a heavier duty pressure plate to support over 600 BHP that utilizes the same "Street" disc. Followed by the Max 6-Puck.
Our crown jewel is our newly released High 5 clutch. It uses an ultra-light disc to enhance better shifting performance. By doing this one will make it easier for the transmission to get into the next gear. The weight of the disc greatly affects the transmission's ability to do this. Amazingly enough this solid disc provides smooth engagements with barley any chatter. A majority of our customer who choose this clutch daily drive on it. This is the clutch currently on our 370Z TT. This clutch will hold 750whp!

Onto the bearing! The first problem encountered with using an aftermarket clutch is that the OE bearing diameter was no where big enough to properly make contact to the pressure plate's fingers. Secondly a majority of the CSC is plastic which gives way as it ages or sees higher pressure plate clamp loads. Fortunately we also designed our pressure plates to NOT require large amounts pressure to release them which spares the bearing any more strain.

Our bearing upgrades will ONLY work on our clutch\flywheel combos. The bearing we are using required us to change the finger height versus the finger height on a factory assembly. This is the reason it won't work on other aftermarket clutches and would also deter others from copying it. The cost of our upgraded bearing is $160 which would be included in our kit.

As a special introductory offer to the370z.com members we will be offering reduced package pricing.
I want to thank the entire Z community for its support and amazing people over the last 10 years.

Packages include clutch disc, pressure plate, flywheel, bearing, pilot bushing, and clutch alignment tool. Proud to say it's all made in the USA!

Sport Street Package: $915

Sport 6-Puck Package: $1015

Max Street Package: $1080

Max 6-Puck Package: $1140

High 5 Package: $1140

If you have any questions please feel free to PM me.

LateralG'z · 08-11-2010, 11:04 PM

Looks great, anyone else in the community testing this package for you guys as a secondary outsider.

kevin.z · 08-11-2010, 11:04 PM

Nice! i like it. But what happens for those who have already purchased clutches and flywheels?

Seb@SZ · 08-11-2010, 11:12 PM

Quote:

Originally Posted by LateralG'z

Looks great, anyone else in the community testing this package for you guys as a secondary outsider.

Yes, we also have another in testing right now.

You have PM.

Seb@SZ · 08-12-2010, 12:35 AM

Quote:

Originally Posted by kevin.z

Nice! i like it. But what happens for those who have already purchased clutches and flywheels?

I'd say wait until you have an issue and fix it when its broken. I'm sorry, I know how it is to buy "double" parts.

Jeffblue · 08-12-2010, 12:41 AM

what about issues with the master cylinder, like in this thread:

JWT clutch is just too damn good... unfortunately...

Seb@SZ · 08-12-2010, 12:48 AM

Quote:

Originally Posted by Jeffblue

what about issues with the master cylinder, like in this thread:

JWT clutch is just too damn good... unfortunately...

We'll need to see this first hand and address it as required. If the issue starts popping up like the black plague we must find a fix. Right now it can be a faulty OE part, also the release required on other aftermarket pressure plates may be too great.

DIGItonium · 08-12-2010, 12:50 AM

Hmm... Sport Street vs. Sport 6-puck paired with GTM Stage 1.

I'm not much of a racer, so the TT'd car will be a daily driver with a bit of spirited driving every once in awhile.

destinyZ · 08-12-2010, 03:03 AM

Quote:

Originally Posted by Jeffblue

what about issues with the master cylinder, like in this thread:

JWT clutch is just too damn good... unfortunately...

I've been watching that same post. Thats exactly why i'm just going to wait for a company to make an aftermarket slave cylinder or for nissan to address the issue if its a faulty OEM.

It looks like it takes a while for it to go bad so the car that are testing it this combo wont feel any probelms later if there are any. I hope not cuz Sz look like they know what there doing. I'm sure someone is going to make an aftermarket master slave cylinder.

ROC1ROB · 08-12-2010, 08:59 AM

Is that a solid ring on the flywheel? Hard to tell from pic's. Hopefully with the proper engagement you guys wont have the CSC problems. I guess time will tell. GL

Seb@SZ · 08-12-2010, 11:08 AM

Quote:

Originally Posted by ROC1ROB

Is that a solid ring on the flywheel? Hard to tell from pic's. Hopefully with the proper engagement you guys wont have the CSC problems. I guess time will tell. GL

The ring gear? Yes it is one piece.

Zolfix · 08-12-2010, 01:55 PM

Pros/cons of the high 5 package over sport street for a NA daily driven car?

RCZ · 08-12-2010, 02:39 PM

There have been several reports of the CSC failing with aftermarket clutches and I know of a few that have happened that have not been reported. Its gonna happen eventually unless you make anew csc from scratch...

Bardabe · 08-12-2010, 09:14 PM

Just got home from chatsworth, Hi guys I'll just introduce myself here in this thread. I'm testing the High 5 on my 2007 Z33 (HR motor) me and Seb installed the clutch and flywheel combo today. ( I live 108 miles away from SZ) my car has seen 56K miles and allot of them where going to the track and to the grocery store. if you guys have any questions about how the clutch feels or any details you guys feel free to ask me or Seb. Today i Installed the clutch and drove it all the way from Chatsworth California to Perris California. I drove through LA traffic on the very first day i got the clutch meaning stop and go traffic, up hills down hills and clear highways.

the high 5 has very minimal chatter but I think what makes it more noticeable is the Nismo GT Pro LSD. because when i take off from lights on a straight line i have no chatter. clutch pedal feel is not that much heavier than stock and there is no flywheel noise at idle or low RPM's like all other Aluminum flywheels. driving is very pleasant. the shifting at high RPM's is very noticeable before i could not slam through the gears like i can now. rev matching is a breeze, this combo over all changed the car. it feels awesome. if you guys plan on modifying your 370's I say just go with the High 5 and never have to worry about if your clutch will hold the power. because this combo is very comfortable to daily drive.

oh how can i forget, if you guys have any questions feel free to ask me or Seb, I'm so Far the only other Authorized Installer. and setting up my vendor account as I type
-Juan

Seb@SZ · 08-12-2010, 10:58 PM

Quote:

Originally Posted by DIGItonium

Hmm... Sport Street vs. Sport 6-puck paired with GTM Stage 1.

I'm not much of a racer, so the TT'd car will be a daily driver with a bit of spirited driving every once in awhile.

You'd want to go with the Max Street setup.

08-11-2010, 10:48 PM	#1 (permalink)
Seb@SZ Enthusiast Member Join Date: Jan 2010 Location: Chatsworth Posts: 277 Drives: Zs Rep Power: 25	SZ Clutch & Flywheel Upgrades + Bearing! Hi guys Over the last month or two we've been working to get our drive-train upgrades to the Z34\V36 community along with the 07-08 Z33s. For those that have never seen or heard about our unique flywheels here's some info. Our flywheels utilize a patented "segmented" heat shield system. Traditional heat shields warp because of the uneven heat produced by a slipping clutch. Just like a car going around in a circle, the outside tires go faster than the inside tires, the clutch disc slides faster around the outside of the flywheel than it does around the inside. The faster moving outside gets hotter than the inside. Because metal expands more the hotter it gets, the outside of the heat shield expands more than the inside. Traditional heat shields are made of one piece metal rings, so when the outside expands more than the inside, the only thing the shield can do is warp. The segmented heat shields are not connected so they can expand and contract without warping. A warped heat shield causes the clutch to slip, which causes more heat and more warpage. Example of a warped shield found on other aluminum flywheels. Our Billet Flywheels are dynamically balanced after CNC machining. Other flywheel manufactures assume that since they CNC their flywheels it comes off the machine fully balanced. This would be true assuming the density of the aluminum is constant throughout the part. Unfortunately even the best billet material is not evenly dense throughout and the starter ring gears are never perfect. SZ Flywheels are also fully rebuildable for the life of the car. We've been using this flywheel design for over 8 years now with excellent success! On the Z33 like the Z34 the flywheels used from the factory are a dual mass design. This allowed the flywheel to absorb noise and vibrations. Since aluminum transfers noise easily we focused on designing a performance flywheel that was still quiet while achieving less weight. Less weight off the crank provides freed up power and a quicker, more responsive revving engine. We provide 5 different clutch options tailored to the car's power and driver's goals. Our entry level Sport Street clutch features a higher clamp load pressure plate able to hold 500 BHP with an organic clutch disc (OE-Style). This is perfect for someone staying NA, or for those making below 450 whp. The Sport 6-Puck we offer uses the same pressure plate but a 6-Puck disc for those looking to drag race. The 6-Puck disc still offers a smooth clutch engagement with the ability to hold a little more power and take abuse. Our Max Street uses a heavier duty pressure plate to support over 600 BHP that utilizes the same "Street" disc. Followed by the Max 6-Puck. Our crown jewel is our newly released High 5 clutch. It uses an ultra-light disc to enhance better shifting performance. By doing this one will make it easier for the transmission to get into the next gear. The weight of the disc greatly affects the transmission's ability to do this. Amazingly enough this solid disc provides smooth engagements with barley any chatter. A majority of our customer who choose this clutch daily drive on it. This is the clutch currently on our 370Z TT. This clutch will hold 750whp! Onto the bearing! The first problem encountered with using an aftermarket clutch is that the OE bearing diameter was no where big enough to properly make contact to the pressure plate's fingers. Secondly a majority of the CSC is plastic which gives way as it ages or sees higher pressure plate clamp loads. Fortunately we also designed our pressure plates to NOT require large amounts pressure to release them which spares the bearing any more strain. Our bearing upgrades will ONLY work on our clutch\flywheel combos. The bearing we are using required us to change the finger height versus the finger height on a factory assembly. This is the reason it won't work on other aftermarket clutches and would also deter others from copying it. The cost of our upgraded bearing is $160 which would be included in our kit. As a special introductory offer to the370z.com members we will be offering reduced package pricing. I want to thank the entire Z community for its support and amazing people over the last 10 years. Packages include clutch disc, pressure plate, flywheel, bearing, pilot bushing, and clutch alignment tool. Proud to say it's all made in the USA! Sport Street Package: $915 Sport 6-Puck Package: $1015 Max Street Package: $1080 Max 6-Puck Package: $1140 High 5 Package: $1140 If you have any questions please feel free to PM me. __________________ Z Car Specialists www.specialtyz.com Blog http://specialtyz.com/blog/ Last edited by Seb@SZ; 08-12-2010 at 12:57 AM.

08-11-2010, 11:04 PM	#2 (permalink)
LateralG'z Track Member Join Date: Nov 2009 Location: Oklahoma Posts: 876 Drives: 370z Rep Power: 17	Looks great, anyone else in the community testing this package for you guys as a secondary outsider. __________________ 2010 Mag Black, 6MT,

08-12-2010, 12:50 AM	#8 (permalink)
DIGItonium A True Z Fanatic Join Date: Jan 2009 Location: Kansas Posts: 3,800 Drives: 09 Z34-TT 6MT Rep Power: 43	Hmm... Sport Street vs. Sport 6-puck paired with GTM Stage 1. I'm not much of a racer, so the TT'd car will be a daily driver with a bit of spirited driving every once in awhile. __________________

08-12-2010, 01:55 PM	#12 (permalink)
Zolfix Base Member Join Date: Mar 2010 Location: Canada Posts: 35 Drives: '10 370z 6MT Rep Power: 15	Pros/cons of the high 5 package over sport street for a NA daily driven car? Last edited by Zolfix; 08-12-2010 at 01:57 PM.

08-12-2010, 09:14 PM	#14 (permalink)
Bardabe Base Member Join Date: Aug 2010 Location: Austin Posts: 57 Drives: R32 GT-R Rep Power: 15	Just got home from chatsworth, Hi guys I'll just introduce myself here in this thread. I'm testing the High 5 on my 2007 Z33 (HR motor) me and Seb installed the clutch and flywheel combo today. ( I live 108 miles away from SZ) my car has seen 56K miles and allot of them where going to the track and to the grocery store. if you guys have any questions about how the clutch feels or any details you guys feel free to ask me or Seb. Today i Installed the clutch and drove it all the way from Chatsworth California to Perris California. I drove through LA traffic on the very first day i got the clutch meaning stop and go traffic, up hills down hills and clear highways. the high 5 has very minimal chatter but I think what makes it more noticeable is the Nismo GT Pro LSD. because when i take off from lights on a straight line i have no chatter. clutch pedal feel is not that much heavier than stock and there is no flywheel noise at idle or low RPM's like all other Aluminum flywheels. driving is very pleasant. the shifting at high RPM's is very noticeable before i could not slam through the gears like i can now. rev matching is a breeze, this combo over all changed the car. it feels awesome. if you guys plan on modifying your 370's I say just go with the High 5 and never have to worry about if your clutch will hold the power. because this combo is very comfortable to daily drive. oh how can i forget, if you guys have any questions feel free to ask me or Seb, I'm so Far the only other Authorized Installer. and setting up my vendor account as I type -Juan Last edited by Bardabe; 08-12-2010 at 10:26 PM.

08-11-2010, 11:04 PM	#3 (permalink)
kevin.z Enthusiast Member Join Date: Oct 2009 Location: vancouver(shipping:WA Posts: 359 Drives: 09 370z M6 PGtouring Rep Power: 16	Nice! i like it. But what happens for those who have already purchased clutches and flywheels?

08-12-2010, 12:41 AM	#6 (permalink)
Jeffblue A True Z Fanatic Join Date: Dec 2009 Location: NY Age: 36 Posts: 9,192 Drives: Z32TT & 335xi Coupe Rep Power: 38	what about issues with the master cylinder, like in this thread: JWT clutch is just too damn good... unfortunately...

08-12-2010, 08:59 AM	#10 (permalink)
ROC1ROB Base Member Join Date: May 2010 Location: AZ Posts: 201 Drives: 09 MT BS Base/Sports Rep Power: 15	Is that a solid ring on the flywheel? Hard to tell from pic's. Hopefully with the proper engagement you guys wont have the CSC problems. I guess time will tell. GL

08-12-2010, 02:39 PM	#13 (permalink)
RCZ A True Z Fanatic Join Date: Nov 2008 Location: Miami Posts: 6,403 Drives: '09 370Z Rep Power: 1119	There have been several reports of the CSC failing with aftermarket clutches and I know of a few that have happened that have not been reported. Its gonna happen eventually unless you make anew csc from scratch...

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