Help!!! :( Pulley Sizes & Belt dont match!

cupcakez · 06-20-2018, 03:20 PM

3.47" Supercharger pulley
+
3.0" Supercharger pulley

Apparently I need spacers made because the 3.47 is offset by half an inch higher than the 3.0".

V3 SCi unit from Stillen Kit

What is the belt part number that would fit these pulleys?
The stock belt doesn't fit (stock supercharger belt)

My mechanic is at a standstill.

We called soho and they said they used spacers custom made to make the pulleys flush with each other.

Any ideas / help would be appreciated!

redondoaveb · 06-20-2018, 03:28 PM

Quote:

Originally Posted by cupcakez

3.47" Supercharger pulley
+
3.0" Supercharger pulley

Apparently I need spacers made because the 3.47 is offset by half an inch higher than the 3.0".

V3 SCi unit from Stillen Kit

What is the belt part number that would fit these pulleys?
The stock belt doesn't fit (stock supercharger belt)

My mechanic is at a standstill.

We called soho and they said they used spacers custom made to make the pulleys flush with each other.

Any ideas / help would be appreciated!

I'm curious what you mean by 1/2" higher? You need a longer belt?

cupcakez · 06-20-2018, 03:37 PM

Quote:

Originally Posted by redondoaveb

I'm curious what you mean by 1/2" higher? You need a longer belt?

http://imgur.com/gPAkYRp

redondoaveb · 06-20-2018, 03:49 PM

Quote:

Originally Posted by cupcakez

http://imgur.com/gPAkYRp

Now I see what you're saying. Dumb question. Can the pulley just be flipped over 180 degrees?

Oops, I see your's already is. Damn, I just ordered a high traction jackshaft pulley and it looks like I'll be having the same issue.

cupcakez · 06-20-2018, 04:00 PM

Im working tirelessly to try to find the solution this is ridiculous

I am 100% sure these pulleys are in the right slots too...
my mechanic said they will try to flip flop the pulleys and put the one on left side on right and right on left but idk i think that isnt the case

My tuner suggested for spacers -- to use either washers that fit tight and snug, or to use the back of the engine / transmission pieces as spacers to help make the pulleys flush.

I attempted calling soho, vortech and topz.
topz was probably busy so ill see about pming him.

soho said they had custom spacers made to fit the 3.0 and 3.47.

vortech said they had no idea and to call stillen but we all know thats a dead end

redondoaveb · 06-20-2018, 04:08 PM

Quote:

Originally Posted by cupcakez

Im working tirelessly to try to find the solution this is ridiculous

I am 100% sure these pulleys are in the right slots too...
my mechanic said they will try to flip flop the pulleys and put the one on left side on right and right on left but idk i think that isnt the case

My tuner suggested for spacers -- to use either washers that fit tight and snug, or to use the back of the engine / transmission pieces as spacers to help make the pulleys flush.

I attempted calling soho, vortech and topz.
topz was probably busy so ill see about pming him.

soho said they had custom spacers made to fit the 3.0 and 3.47.

vortech said they had no idea and to call stillen but we all know thats a dead end

I just talked to stillen and his tech guy is at lunch and should call me back in about a half hour. I'll let you know what he says. That's weird that it would be a different offset though.

cupcakez · 06-20-2018, 04:14 PM

Quote:

Originally Posted by redondoaveb

I just talked to stillen and his tech guy is at lunch and should call me back in about a half hour. I'll let you know what he says. That's weird that it would be a different offset though.

Throughout all my research I never heard of anyone talking about this offset or changing of supercharger belt issue.....
ugh.
im super stressed atm

Evan (stillenz84) has the same pulley setup but never talked about these 2 issues

either my mechanic and i are doing sth wrong or idk.

im willing to pay $20 to anyone that can provide the solution for correct belt size for this 3.47 and 3.0 setup as well as how to fix the spacer issue...

pleaseee asap

TopgunZ · 06-20-2018, 04:20 PM

Do not swap the pulleys from from JS to SC like your mechanic said or you will make like 6psi of boost..lol..

Assuming you have the 2.8 serp side (9psi stillen) pulley I would scrap the 3.47 and go with just the 3.0. That alone will get you to 13psi. If you want more than swap the 3.0 to the 2.8" and get the 3" idler.

If you want power now since its at the mechanic then keep the filter off and do the 3.0 only which should get you around 16psi.

cupcakez · 06-20-2018, 04:22 PM

Quote:

Originally Posted by TopgunZ

Do not swap the pulleys from from JS to SC like your mechanic said or you will make like 6psi of boost..lol..

Assuming you have the 2.8 serp side (9psi stillen) pulley I would scrap the 3.47 and go with just the 3.0. That alone will get you to 13psi. If you want more than swap the 3.0 to the 2.8" and get the 3" idler.

If you want power now since its at the mechanic then keep the filter off and do the 3.0 only which should get you around 16psi.

Would I need to get a different belt at all if I went this route?
So what you suggest is to change only ONE of the supercharger pulley and not both?

cupcakez · 06-20-2018, 04:24 PM

Quote:

Originally Posted by TopgunZ

Do not swap the pulleys from from JS to SC like your mechanic said or you will make like 6psi of boost.

He didnt mean that, he meant to swap the 3.47 slot with the 3.0 slot in case it was wrong haha but i doubt that makes any diff?

TopgunZ · 06-20-2018, 04:27 PM

Quote:

Originally Posted by cupcakez

Would I need to get a different belt at all if I went this route?
So what you suggest is to change only ONE of the supercharger pulley and not both?

No new belt needed. And Yes.

Quote:

Originally Posted by cupcakez

He didnt mean that, he meant to swap the 3.47 slot with the 3.0 slot in case it was wrong haha but i doubt that makes any diff?

Slot like retainer key?

cupcakez · 06-20-2018, 04:30 PM

Quote:

Originally Posted by TopgunZ

No new belt needed. And Yes.

Slot like retainer key?

Nooo haha. Like say u have two cups and underneath each cup is an M&M
One is blue the other green but the cups stay in same spot.

Swapping the M&Ms but keeping cups same spot is what I believe he meant. That concept if makes senseee

And ok. Ill tell him to keep the supercharger pulley and just swap out for the 3.0 and keep the other one as is.

That was a 3.2" size 8 rib SC pulley, and now will be paired with a 3.0" correct?

Should the pulleys be flush with each other

TopgunZ · 06-20-2018, 04:39 PM

Yes, Yes.

cupcakez · 06-20-2018, 05:01 PM

Thank you.
My mechanic is doing as you said right now and will let me know how it goes.
If all is good then I O U

redondoaveb · 06-20-2018, 05:15 PM

Quote:

Originally Posted by TopgunZ

Yes, Yes.

Aaron,
Is the jackshaft pulley sc side a standard vortech 8 rib? I need to swap mine out with a high traction, that's where my belt slippage is coming from.

06-20-2018, 03:20 PM	#1 (permalink)
cupcakez Track Member Join Date: Oct 2017 Location: California Posts: 635 Drives: 2009-7AT-Base-Coup Rep Power: 4836	Help!!! :( Pulley Sizes & Belt dont match! 3.47" Supercharger pulley + 3.0" Supercharger pulley Apparently I need spacers made because the 3.47 is offset by half an inch higher than the 3.0". V3 SCi unit from Stillen Kit What is the belt part number that would fit these pulleys? The stock belt doesn't fit (stock supercharger belt) My mechanic is at a standstill. We called soho and they said they used spacers custom made to make the pulleys flush with each other. Any ideas / help would be appreciated!

06-20-2018, 04:00 PM	#5 (permalink)
cupcakez Track Member Join Date: Oct 2017 Location: California Posts: 635 Drives: 2009-7AT-Base-Coup Rep Power: 4836	Im working tirelessly to try to find the solution this is ridiculous I am 100% sure these pulleys are in the right slots too... my mechanic said they will try to flip flop the pulleys and put the one on left side on right and right on left but idk i think that isnt the case My tuner suggested for spacers -- to use either washers that fit tight and snug, or to use the back of the engine / transmission pieces as spacers to help make the pulleys flush. I attempted calling soho, vortech and topz. topz was probably busy so ill see about pming him. soho said they had custom spacers made to fit the 3.0 and 3.47. vortech said they had no idea and to call stillen but we all know thats a dead end Last edited by cupcakez; 06-20-2018 at 04:04 PM.

06-20-2018, 04:20 PM	#8 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6834	Do not swap the pulleys from from JS to SC like your mechanic said or you will make like 6psi of boost..lol.. Assuming you have the 2.8 serp side (9psi stillen) pulley I would scrap the 3.47 and go with just the 3.0. That alone will get you to 13psi. If you want more than swap the 3.0 to the 2.8" and get the 3" idler. If you want power now since its at the mechanic then keep the filter off and do the 3.0 only which should get you around 16psi. __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

06-20-2018, 04:39 PM	#13 (permalink)
TopgunZ A True Z Fanatic Join Date: Jun 2012 Location: Minneapolis Posts: 2,651 Drives: 06 350Z , 09 370Z MT Rep Power: 6834	Yes, Yes. cupcakez likes this. __________________ ROTREX SUPERCHARGER TUNER KITS - $6799/ CUSTOM STILLEN AIR TO AIR KITS -$2100/ 700+ WHP!! WWW.TOPGUNSPEEDWORKS.COM

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
Pulley Diamater Sizes? (SC Supercharger Kit Post-Installations)	cupcakez	Forced Induction	5	01-24-2018 10:04 PM
[FOR SALE] OEM Crank Pulley & Belt	dudesky	Parts for sale (Private Classifieds)	0	05-09-2015 06:32 PM
need help with my 370z my fender liners dont match or line up..	dima370z	Exterior & Interior	3	12-20-2013 10:55 AM
supercharger pulley sizes	jcast_0089	Forced Induction	2	06-30-2013 07:15 PM
[FOR SALE] NST Underdrive Pulley Kit w/Belt	1ceasar180	Parts for sale (Private Classifieds)	9	06-27-2011 10:34 PM

06-20-2018, 05:01 PM	#14 (permalink)
cupcakez Track Member Join Date: Oct 2017 Location: California Posts: 635 Drives: 2009-7AT-Base-Coup Rep Power: 4836	Thank you. My mechanic is doing as you said right now and will let me know how it goes. If all is good then I O U