For day to day running about, no it likely wouldn't. At the track it will definitely help stave off heatsoak.

I want to be clear about the additional idler pulley kit that I offer.

1. It will NOT change the ratio of the SC drive so it will not increase boost, but it will eliminate belt slip which will let you achieve the boost you are set for.

2. This additional pulley goes on the main drive serpentine belt that drives the SC jackshaft. It does not go on the SC drive belt which is the small eight rib belt that runs from the Jackshaft to the SC.

3. This design is not mine, it was originally done by Stillen (that is why the threaded hole exist in the SC mounting bracket). They apparently were using this additional idler pulley early on and then abandoned it for some reason. My speculation is that a little belt slip is extra insurance for Stillen in that the boost level is controlled by some designed in belt slip at high rpm.

4. PaulyZ came up with the part number for the idler pulley and a six rib belt that he is/was using. PaulyZ has since disappeared from the forum or at least the boost threads.

5. My part of this is designing a custom spacer that works properly with the "PaulyZ" pulley and finding an eight rib belt that could be modified to work for this application.

I hope this clears up some of the confusion of what is going on. Just remember that there are TWO drive belts involved, the main serpentine belt (seven rib) that drives everything off of the crankshaft and then the SC drive belt (eight rib).

If you decide to go to the 9lb boost setup either by using the Stillen 9lb pulley or the Vortec pulley, you will need the additional idler pulley to eliminate belt slip at high rpm.

All information has been disclosed in the forum on how to do this. What I am offering is the parts to do the mod with as little frustration as possible by eliminating the parts hunt.

http://www.the370z.com/members/acoro...80750722-o.jpg

http://www.the370z.com/members/acoro...78655130-o.jpg

Charles is installing mine and he sent these over. TBatt looking good??

Topgun Herd he was blowing up your line this past weekend :rofl2:

Cant wait :happydance:

Lookin good. Go beat on!

Sweet!!!!!

Your gonna' love it!

BTW: save up for replacement rear tires.........

Off topic but interesting.

The International Model Power Boat Association (IMPBA) is holding their International competition in Huntsville this week. Wow, these RC boats are FAST!

The most amazing record was for the 1/16 mile drag run. How does 1.3 seconds at 163MPH sound! This was done with an electric powered boat. The high nitro boats are running "only" in the 130MPH zone.

Looks like you have the extra pulley mod with the 8psi pulley. Im not sure anyone has ran it like that yet. Im surprised there was even enough room to fit the belt inbetween the two. It might smoke it.

5000 miles on mine so far and it is working great. Look at how the belt is threaded through the whole drive system. The belt bend radius is smaller at other points than at the top.

Most of us are using the stock jack shaft pulley diameter (the same as shown in the picture) even if running the 9psi setup because we use the Vortec pulley on the SC drive belt side. Stillen 9psi pulley = $200, Vortec 9psi pulley = $90.

I've got the regular 8psi pulley in the front side of the jackshaft as well. It's tight for sure. In fact have to be careful, I got just a little bit of water on the area doing some cleaning the other day and it was enough that it kicked the belt right off.

Was going to grab a 9psi pulley, just to clarify it sounds like the Vortech one goes in the SC backside of the jackshaft where the Stillen one goes on the front. Correct? I hadn't contemplated there would be a difference but stands to reason there is I suppose.

I actually had one before and wasn't going to use it so I sold it. Which of course I now regret.

Concept Z performance was selling the stillen 9psi pulley for $90 a few months ago. Then i looked for a customer a while back and they were $120 and i looked just now and they are $195! WTH man.

Is anyone else interested in a group buy of the "Supercharger System Pulley, 9lb - Nissan 370Z 09+ Z34" ?

Stillen actually discontinued them a couple weeks ago. hence the rise in cost..

Ah that sucks.

So just to clarify, still pulley front of jackshaft and Vortech rear?
Others like 928 etc I assume are rear of the jackshaft as well?

I'm using the Vortec 2.95 pulley on the SC. You will also need to replace the SC drive belt idler with a larger pulley to take up the slack. I'll get the pulley number and post it.

Now I'm really kicking myself in the butt for selling the 2.84 which I guess was the Stillen one.

There's still a lot of room on the Stillen tensioner, that wouldn't be enough for only one size down in pulley?

With the 2.92 pulley, I ran out of adjustment before the belt was tight enough. Some modified the idler pulley mounting bracket to compensate but swapping the Idler pulley is MUCH easier. I'm still looking for the part #......

I have a spare pulley from an OEM tensioner I had to replace. It's bigger for sure but without meSuring it may be slightly too big. I've got some playing with things to do later on so will check it out at the same time.

That said, I'm more keen on changing the serpentine side pulley anyhow, provided I can find one that is the normal price. Looks to me like there is still enough room in the OEM tensioner that the belt I got from you with the extra idler should still fit just fine.

What's all this talk about various pulley upgrades? I thought you only ever replace the SC Input Pulley and the rest stay as they are...

What brand and where did u order? An6 pic of three Bay of how u set it up?

Sure man
Just running for work I'll pop up pics and info later. :)

Sent from my SM-G920F using Tapatalk

little bit off-topic here but still related to these upgrades,

will be running similar to what topgunz is in regards to engine mods, what clutch is everyone using for around 500-550rwhp? I've been to a couple places here in Aus and they are telling me I need to go a button clutch anything else won't handle it which sounds a bit weird. our 370z's aren't torque monsters, any recommendations?

South bend stage 3 daily is a good all arounder. If you are tracking, dragging etc then that's different though. All depends how you use it.

I'm running a Southbend Daily Stage 3 as well. It was about 30,000km old too by the time I got the SC on there and it's still holding fine for now.

http://www.350z-uk.com/topic/82588-v...n#entry1244631

Some info on pcv post #14
I'm running the 2 can method explained here

I'm running 2 mishimoto compact cans in black

Sent from my SM-G920F using Tapatalk

I second this. I ran mine at 530whp and 480wtq for over a year on a single turbo that ramped torque in hard and fast and it never even thought of slipping. Switched to the SC and it seen even less torque so zero chance it will slip. I would push this clutch to over 500wtq all day and the SC's wont get near that level. Plus it had a stock feel to it. Id buy it again in a heartbeat.

Second this too. :tup:

My Southbend Stage 3 Daily is arriving TODAY from ZSpeed.

ChaseZ, You are correct. The Stillen 9lb pulley replace the silver 8psi pulley (jackshaft) on the serpentine belt side. See attachment.

My search for the larger idler pulley to use on the SC belt when changing the SC pulley to a 9psi setup (2.95 inch) has been very frustrating. I have been using the search tools but keep coming up empty on the part number.

What I did find is the pulley needs to be 76mm in diameter and I think the width is around 32mm. This weekend I will take some measurements of mine and then get the PN from the Gates catalog. Hopefully I can see the PN and remove all doubt.........

As an FYI: the SC belt is a Gates K08022 or Magnuson M-79-08-02-020.

Vortech 2.95 SC pulley is PN 2A038-295
Idler pulley needed is (maybe) Gates 36225. I need to verify this!

For reference the pulley off the OEM serp tensioner is 71mm
However it's probably only wide enough for a 7 rib not 8. Ere is a pretty substantial flange around it which could probably be machined off, but for the cost of a pulley likely isn't worth the effort or expense.

Thanks :tup:

Does anyone know where you can get a Stillen 9lb pulley?
conceptzperformance.com just ran out.

Stillen 9lb pulley is 2.75" 7 ribs from what i have seen on other forums. Correct me if i am wrong.

So I would need to find a similar pulley. Maybe from Vortech. Let me know if anyone finds one please. I will keep looking.

JB has a 76mm smooth idler with 17mm shaft for $43

3, 8 rib, 17mm replacement flat belt tensioner double bearing idler pulley 3 replacement flat belt tensioner double bearing idler pulley 8 rib [Idler 3.5.8R FLAT] - $43.08 : Jon Bond Performance, The Worlds Premier Supercharger Rebuilder and Parts St

I use the OS Giken Grand Touring with twin plate and the soft cover and it's been great.

Performance Clutch - Grand Touring

sales@osgikenusa.com

Anyone? :confused:

By replacing the sc pulley you:
A. Can get the pulley for half the cost of stillen 9psi.
B. Can keep better belt grip on the 8psi pulley
C. Can spin the sc even faster than with the 9psi. Depending on size or a combo of 9psi and sc pulley.

Looks like that one will work.

I have replaced both the SC and jackshaft (serp side) pulleys with Vortech's "high traction" ones, added the bigger 3" SC idler pulley to be able to get the SC belt tight enough and added TBatts additional idler pulley to the serp side. This has given me a great performance increase (air to air setup) and no detectable belt slip.

https://vortechsuperchargers.com/pro...ant=7811182081

That's a good price for high traction pulleys. Usually the coating alone basically doubles the price.

Cheers guys, was thinking the stage 3 daily as well but wasn't sure, after reading your comments it seems it will be sufficient, going to ask Zspeed about the Stage 3 daily, there's also a Stage 4 daily there as well but no in kit format, will ask the differences if not much difference will take the Stage 4 to be safe for future.

Weird....my 9lb pulley is Silver....the 8lb one I got from Stillen was blue.

Super weird. You should put a caliper on those.