NST You has PM. :tup:

I bought both these pulleys off another member here about 6 months ago which were never installed. I paid $100 or so to get these thrown on and I would do it again in a hear beat. For all the power seekers, this mod probably wont get your rocks off,but the difference is day in night as far as drivetrain mass and what you feel on initial take off. This thing is paying dividends now that its summer and I'm running the A/C non stop(no more boat towing feel). A+ for a safe cheap mod! P.S. Chris you are REALLY missing out her bud!

I have the pulleys in hand, just waiting for the belt to arrive that was backordered. I'm hoping to get it installed by the end of the month if the belt comes in time.

Is there a cash discount if I pick some up from you directly? ;)

I got your pulleys but read that those pushing over 500hp and 10k rpms could see problems. Now I don't go to 10k rpm but I am pushing the higher HP. What do you guys recommend? Should I install it?

Local auto store should have Gates belts... I forgot the exact size/part #, but I know O'Reilly normally stocks it.

Just order the crank and alternator pulley. I'll let yall know how the install and what not goes. Hoping to have it done before my gears next week. Any suggestions on how to remove the crank pulley? Heard it can be a b****.

Removing the crank pulley is not very easy. I don't recommend even trying by yourself in your home garage, unless you've got friends to help and/or the right tools. The best tool for locking the flywheel in place would be to order the one that Nissan lists in their service manual, but you can get by with a second person and a prybar or large screwdriver to hold the back. Get the biggest longest breaker bar setup you can for loosening the front pulley nut.

First paragraph from my stillen pulley install here might prove useful: http://www.the370z.com/members-370z-...html#post59072

If worst come to worse I can do this, but I already ordered it, and there's no rush so I'm not worried for a delay in a backorder. Just wondering if it was in stock or not cause I moved last weekend so I had a new address to ship to.

Why can't I just throw the car in 6th gear and set the e-brake? That bolt can't be on tight enough to turn that kinda mass.

I'm considering getting a set of NST pulleys next spring, I would like the engine to be a bit more responsive when revving both for rev matching and just revving in general. How much is a ballpark figure for installation for those who have had a shop install their pulleys?

Christian, I've had mine done for $150. There were absolutely no issues with the install.

So with this pulley kit the water pump would slow down correct? is there any heating issue with these pumps. i dont know if its covered but Im not willing to read 30 pages to figure it out.

Thanks!

No the coolant pump and oil pump are controlled by the timing chain, which is separate from the belt/crank pulley.

The pulley belt runs the alternator, A/C, and power steering.

For those with this mod, any increase in engine noise over time? I'm talking those who have had them for atleast 6 months.

Kind of odd that we can get picture updates in the other thread, but can't get a response on here or from PMs... :icon08:

NST Still waiting on that belt, or at least a good word on when they'll be in stock/shipping... :ugh2:


For those of you with these installed already, did you use the Gates K070786 Belt that comes from NST, or did you use the OEM one already on the car, and if you didn't use either of those, and got your own, What belt did you get and from Where??

I hope you eventually get the belt. I used the belt provided by NST for my pulleys. You can use the OEM belt but it won't fit the same as the NST belt. It was covered way early in this thread and that's why NST started providing the kit with the belt.

Here is what the package looked like for me, it came with M&M
NST Pulleys + Belt Kit

Yeah, mine did too lol It was cool even though I don't eat them. I was notified on my invoice that they were out of stock, and would be back in stock by end of July. Well it's almost mid august now and still no word from them on if they're in stock (Even though the website said they were when I ordered, and still does say in stock) And I'm trying to be patient with them, but I really don't like having the parts sitting here wanting to install them, with no belt. And I'm almost about to just go to autozone and get one, but I want to make sure I get the right one since obviously the OEM one they'll have listed isn't right...

I ordered my pulley's friday and got them wednesday. I didn't order the belt though. Gonna go pick it up from o'reilly's tomorrow. And the m&m's were freaking sweet. Thanks!

Yeah, the pulleys arrived super fast. :tup:


Which belt are you getting, there's an O'reilly's up the street I can go to..

I hear you Chris, I would call just call Mike @ NST rather than PMing. The belt with the part number you listed above can be acquired from Autozone as well :tup:

Use the Gates belt, whichever model number (length) NST recommends for your setup. Gates is good quality stuff, and they're generally available from local auto places, although sometimes they have to order them from a local dist center (a few hours, or a day at most).

Just ordered this belt from O'reilly's. Cost me $50.

What is the belt number so I can go pick one up this afternoon?

Well the K070776 is what I used because I have a mixed pulley set (NST's OD alternator + my old Stillen UD crank that I had already installed ages ago). It's the same one you use with just Stillen's UD, and was still in range.

NST seems to recommend K070786, which is a very slightly longer belt (and their UD pulley is a little bit bigger, so that makes sense).

Check the belt tensioner's marks after install and you'll know if everything's kosher on belt tension (service manual page EM-13).

Ok so instead of searching all 29 pages and 400+ post has anyone had any negative issues with these kits? I'm interested but my local performance shop who is very very experienced with cars in general but mostly the VQ series and they have warned me not to install a pulley kit on my Z.

Same here, heard various rumors of not to install these with an S.C kit. And a few others saying not to do so... any truth to it?

Well, with a Supercharger, you shouldn't use an underdrive crank pulley, as it underdrives the supercharger (although I guess you could make up for it by using a custom overdriven SC pulley to match, but it would be simpler to just run the stock crank pulley size). You could run a lightweight normal-sized pulley though.

The other argument (unrelated to superchargers) is about whether our crank pulley provides some sort of necessary harmonic balancing function for the engine internals, and thus replacing it with an aftermarket lightweight variant (underdriven or not) would lead to earlier engine failure because the crankshaft will vibrate funny and tear things up.

All I can say definitively about that, not being a Nissan engine designer, is my very lightweight Stillen underdrive pulley has been on my car for 18K miles and a lot of hard runs, and I haven't seen any ill effects yet.

This was debated in depth in a Stillen pulley thread. In the end I chose to believe the side of the argument that says the pulley is fine on this car, but it's easy to see how some people would be cautious or confused on the subject. Read the whole thread here, especially starting 2-3 pages in: http://www.the370z.com/engine-drivet...nk-pulley.html

I guess thats my problem because I ordered these, and would really like to install them. But I do hope to one day go S/C. I just don't know When that day will be... So do I install it and enjoy it now up until I go FI, or do I leave them off to save myself the cost of installing/uninstalling them... But having parts sitting here collecting dust... :confused:

I wouldn't worry about it. Taking off your UD pulley is like 1/1000th the labor of installing a supercharger, just be sure to save your stock one.

I guess since I don't have the belt, I'll just hold off on it. Maybe get a set of Stillens and have them installed at the same time since the front bumper will be off anyways, I'm guessing that might help with the install... or no?

Well, it certainly saves a little time wasted on lifting the car and removing the undertray, but the bumper doesn't affect things much for the pulley install. What would make the pulley install easier would be removing your radiator + core support, but unless you already had plans to upgrade your radiator, it's kinda overkill :).

Other than the tricksy bit of actually getting the crankshaft bolt loosened the first time, the pulley install is really simple with the right tools in hand.

Sweet, that is not bad at all! I will call Seb at SpecialtyZ, he always has amazing prices.

Thank you for the recent feedback and comments ladies and gents.

Pulleys are in stock and ready for immediate shipping. Red and Gray.
Belts are unfortunately on back order at this time, but should be available shortly.

As always, everyone is welcome and encouraged to contact us by phone for any reason.
281-917-0221.

MIKE @ NST

This is the only concern I have. Any experiences?

I never noticed an increase in engine noise from switching the pulleys on my car, and mine have been on a really long time. There might be some (it would make sense, since the stock crank pulley has an NVH ring), but IMHO it's pretty inconsequential given how noisy a modded car is anyways. If you have aftermarket intake/exhaust work, that's going to drown out any change from the pulley.

NST Please check your PM's, thanks.

One thing I notice is how much easier rev matching is in my car. The pulleys make it a cinch. The only downside, and I can't prove if its the pulleys or the new master cylinder, is that I can feel the engine vibartions in my clutch pedal. Can't prove what it is but its definitely a change.

Very true about rev matching. And regarding vibrations, most of our customers report less noise/vibrations when using our pulleys compared to the OEM pulleys.


MIKE @ NST

hi, i sent you guyz an e-mail on info@nonstoptuning.com and im still waiting for a response,how can i contact you