Pulleys

Z4fun · 10-11-2018, 09:18 AM

I have a stillen sc with stock 8lb pulley no other upgrades. I want to upgrade to a2a and add 9lb pulley . Can I just take up the slack with the tensioner as stated on z1 and concept Z website or will it have slip?

Has anyone done this and have some input of this ? Thanks.

TopgunZ · 10-11-2018, 11:20 AM

Quote:

Originally Posted by Z4fun

I have a stillen sc with stock 8lb pulley no other upgrades. I want to upgrade to a2a and add 9lb pulley . Can I just take up the slack with the tensioner as stated on z1 and concept Z website or will it have slip?

Has anyone done this and have some input of this ? Thanks.

Most of the slack will be taken up from the auto tensioner. You may experience a little slip but not much. If you upgrade to the Si trim impeller you will have a higher chance of slip due to the fact that it creates more drag on the supercharger which ties all the way back to the serp belt.

I can get you my kit with my anti-slip pulley I send with my full supercharger kits as pictured below.

http://www.the370z.com/members/topgu...6-grip-mod.png

Z4fun · 10-11-2018, 09:11 PM

Quote:

Originally Posted by TopgunZ

Most of the slack will be taken up from the auto tensioner. You may experience a little slip but not much. If you upgrade to the Si trim impeller you will have a higher chance of slip due to the fact that it creates more drag on the supercharger which ties all the way back to the serp belt.

I can get you my kit with my anti-slip pulley I send with my full supercharger kits as pictured below.

http://www.the370z.com/members/topgu...6-grip-mod.png

Thanks Topz ,
Not planning to do the Si upgrade. But I do like that anti slip setup , not sure why stillen didn't have that in the first place lol.

BOLIO 671 · 11-02-2019, 11:22 AM

I know this is an old thread being revived but I’m in the market for some pulley upgrades. I also am confused on the pulley sides. Maybe someone can point me in the right direction. Currently running the V-3 SCi with TopGunz A2A Kit.

I plan on doing the 928 SuperVortech upgrade. Right now only have the Stillen 9lb pulley that only gives me 8.76psi at 7300rpm. I replaced it as advised by Stillen back when I was on Stillen Kit before TopGunz made his kit available. (Refer to attached pic). Apparently the pulley that was there before was color Blue and I was told by Stillen at the time that the Blue pulley was their 8pb pulley that came with the kit (which only gave me 6/7psi). Reading this thread got me
confused as to whether this was the right pulley i replaced as recommended by Stillen back in 2015

What pulleys would any of u gents recommend with the 928 SuperVortech upgrade and what kind of boost increase would each or any of the pulleys u all recommend actually deliver. 928 is advertising their upgrade to be capable of 72k RPMs and running at 60k + RPMs all day.

redondoaveb · 11-02-2019, 11:35 AM

My car with the 928 super vortech, 9lb pulley, 3.47 jackshaft pulley sc side and 3.00 sc pulley made 16.4 psi.

With the 928 impeller and the 9lb pulley I bet you see closer to 11 psi. Also, if I remember correctly, the 9lb pulley is a 2.87. You can measure your's to verify what you have.

cupcakez · 11-02-2019, 12:30 PM

Quote:

Originally Posted by redondoaveb

My car with the 928 super vortech, 9lb pulley, 3.47 jackshaft pulley sc side and 3.00 sc pulley made 16.4 psi.

With the 928 impeller and the 9lb pulley I bet you see closer to 11 psi. Also, if I remember correctly, the 9lb pulley is a 2.87. You can measure your's to verify what you have.

Maybe should mention what else you modded to fit the 3.47" and 3.0" pulley on the SC belt side. IIRC you needed pulley spacers of a certain size and needed to change the idler pulley on the SC side as well? To make this combination work or no?

And that you have a turbo guard instead of the K&N air filter to be able to make the 16.4 psi, since I'm not sure if everyone is running with a turbo guard or not.

redondoaveb · 11-02-2019, 01:07 PM

Quote:

Originally Posted by cupcakez

Maybe should mention what else you modded to fit the 3.47" and 3.0" pulley on the SC belt side. IIRC you needed pulley spacers of a certain size and needed to change the idler pulley on the SC side as well? To make this combination work or no?

And that you have a turbo guard instead of the K&N air filter to be able to make the 16.4 psi, since I'm not sure if everyone is running with a turbo guard or not.

The spacers you can get from 928 for less than $30.00. Those have nothing to do with boost levels as he was asking about.

My car made over 10 psi with the Si sc, 9lb pulley and stock filter. That's why I believe he will make over that with the 928 upgrade.

But yes, when I went to the 3.47/3.00 combo I went to the turbo guard.

My car also made 12.86 psi with the stock Si sc, 9lb pulley, stock 3.2 jackshaft pulley, upgraded 2.85 sc pulley and stock filter.

"Z"en · 11-02-2019, 01:32 PM

Quote:

Originally Posted by BOLIO 671

I know this is an old thread being revived but I’m in the market for some pulley upgrades. I also am confused on the pulley sides. Maybe someone can point me in the right direction. Currently running the V-3 SCi with TopGunz A2A Kit.

I plan on doing the 928 SuperVortech upgrade. Right now only have the Stillen 9lb pulley that only gives me 8.76psi at 7300rpm. I replaced it as advised by Stillen back when I was on Stillen Kit before TopGunz made his kit available. (Refer to attached pic). Apparently the pulley that was there before was color Blue and I was told by Stillen at the time that the Blue pulley was their 8pb pulley that came with the kit (which only gave me 6/7psi). Reading this thread got me
confused as to whether this was the right pulley i replaced as recommended by Stillen back in 2015

What pulleys would any of u gents recommend with the 928 SuperVortech upgrade and what kind of boost increase would each or any of the pulleys u all recommend actually deliver. 928 is advertising their upgrade to be capable of 72k RPMs and running at 60k + RPMs all day.

For 62k+, you will be dealing with belt tension and slip when putting the K$N filter on.

BOLIO 671 · 11-04-2019, 10:31 AM

Quote:

Originally Posted by "Z"en

For 62k+, you will be dealing with belt tension and slip when putting the K$N filter on.

Great feedback from everyone...TY Gents... I also forgot to mention that I have TBatts idler pulley/belt upgrade. Hoping that helps keep things down. I am also like Redondoaveb and using the turbo guard with no filter.

Are the spacers needed for the upgrade @redondoaveb for the jackshaft/SC pulley upgrades? Its been a minute since I’ve been on the forums but I also recall ur set up having the fabricated wastegate to the charge pipe. I recalled u referring me to Alex with L-Spec up in Hawthorne. I also reached out to Seb since he’s the one that has tuned my Z and was working/tuning ur Z at the time and he mentioned they (Specialty Z) were considering fabricating the piping and wastegate set up for open sell to others like myself....but not sure if that ever materialized or not. I also emailed Alex but last I heard they were working on a putting a pricing group together but received no other update since that time which was about almost a year ago. LOL

If the wastegate upgrade isn’t available then I won’t be going for boost anywhere in ur range... @redondoaveb. Don’t think it would be feasible for me without that and a boost controller as I am on a stock block with stock internals ...I’m using the CJM S1-SE set up what the 485 Walbro pump/CJM Top hat 1000cc Bosch Injectors for plumbing but unfortunately my fuel options are limited. The weather out here in the West Pacific doesn’t work well with E-85 or any flex type fuel due to our humidity. 91 at the pump is the highest we get with the exception of course of VP MS109 from our local race shop that ships that good stuff in. But at $120 for a five gallon can...we save that strictly for track days/money race events...Lol. We do have great sunny weather year round and nice white sandy beaches though LOL!!!!! Give and take I guess... Oh well...

Since a little more has been shared on my set up any great advise from those of u with the experience here would be greatly appreciated. Thank you for laying down the groundwork for improving this kit. If it wasn’t for TopGunz and guys like you on this forum we would all be stuck with the basic Stillen Kit.

redondoaveb · 11-04-2019, 10:53 AM

Quote:

Originally Posted by BOLIO 671

Great feedback from everyone...TY Gents... I also forgot to mention that I have TBatts idler pulley/belt upgrade. Hoping that helps keep things down. I am also like Redondoaveb and using the turbo guard with no filter.

Are the spacers needed for the upgrade @redondoaveb for the jackshaft/SC pulley upgrades? Its been a minute since I’ve been on the forums but I also recall ur set up having the fabricated wastegate to the charge pipe. I recalled u referring me to Alex with L-Spec up in Hawthorne. I also reached out to Seb since he’s the one that has tuned my Z and was working/tuning ur Z at the time and he mentioned they (Specialty Z) were considering fabricating the piping and wastegate set up for open sell to others like myself....but not sure if that ever materialized or not. I also emailed Alex but last I heard they were working on a putting a pricing group together but received no other update since that time which was about almost a year ago. LOL

If the wastegate upgrade isn’t available then I won’t be going for boost anywhere in ur range... @redondoaveb. Don’t think it would be feasible for me without that and a boost controller as I am on a stock block with stock internals ...I’m using the CJM S1-SE set up what the 485 Walbro pump/CJM Top hat 1000cc Bosch Injectors for plumbing but unfortunately my fuel options are limited. The weather out here in the West Pacific doesn’t work well with E-85 or any flex type fuel due to our humidity. 91 at the pump is the highest we get with the exception of course of VP MS109 from our local race shop that ships that good stuff in. But at $120 for a five gallon can...we save that strictly for track days/money race events...Lol. We do have great sunny weather year round and nice white sandy beaches though LOL!!!!! Give and take I guess... Oh well...

Since a little more has been shared on my set up any great advise from those of u with the experience here would be greatly appreciated. Thank you for laying down the groundwork for improving this kit. If it wasn’t for TopGunz and guys like you on this forum we would all be stuck with the basic Stillen Kit.

If 91 is the only fuel you're going to run then the wastegate wouldn't be needed. You can run around 13 psi on 91 before knock. If you plan on boosting above that level by using a higher octane fuel then you would need the wastgate in order to dump excess boost when you're running 91. I bet if you contacted Seb, he would be able to build you a custom set up like he did with me.

10-11-2018, 09:18 AM	#1 (permalink)
Z4fun Base Member Join Date: Aug 2018 Location: N/A Posts: 28 Drives: 12 Nissan 370Z SC M6 Rep Power: 7	9lb pulley on stock system .. belt slip? I have a stillen sc with stock 8lb pulley no other upgrades. I want to upgrade to a2a and add 9lb pulley . Can I just take up the slack with the tensioner as stated on z1 and concept Z website or will it have slip? Has anyone done this and have some input of this ? Thanks.

11-02-2019, 11:35 AM	#5 (permalink)
redondoaveb A True Z Fanatic Join Date: Apr 2017 Location: So. Commiefornia Posts: 6,370 Drives: 2014 Nismo Gunmetal Rep Power: 2684375	My car with the 928 super vortech, 9lb pulley, 3.47 jackshaft pulley sc side and 3.00 sc pulley made 16.4 psi. With the 928 impeller and the 9lb pulley I bet you see closer to 11 psi. Also, if I remember correctly, the 9lb pulley is a 2.87. You can measure your's to verify what you have. BOLIO 671 likes this. __________________ Fast Intentions "Stage Seb" twin turbo #098- Specialty Z/Tial-Xonarotor/CJM/Ecutek/HKS/KW/SPL/Hotchkis/Rohana/Toyo 700+whp Last edited by redondoaveb; 11-02-2019 at 11:53 AM.

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