thanks mike and thanks for your great product!!

I did a writeup on the other parts I installed at the same time as the pulley. I'm just trying to assist in posting relevant information in the hopes that the forum members can discern the gains from one part to the other. So with that said, I'll post a quick writeup of my experience so far with the NST pulley kit. I did not install this myself, but was with the mechanic throughout most of the process.

Package: Package was very light and inside a USPS box. Alt. pulley was wrapped in newspaper and inside the crank pulley, which was also wrapped in news paper. I ordered them in grey and they came as such. There were a couple dings but nothing to get butt hurt about.
Installation: The install was about what is expected with pulleys. The radiator fans were removed for space, as well as the radiator overflow reservoir. The stock crank pulley came off fairly typical. (Only 4k miles). The alternator was removed and placed in a vice to remove and replace the pulley. Installing the NST crank pulley was a bit tougher. We had to grind it down some more because it was so damn tight. The shop took their time to do it right to prevent it from seizing and bonding to the crank (making a PITA to remove in the future).
Appearance: They are grey and tucked deep inside the engine bay... It looks great and matches my CAI :P But aesthetically, it's difficult to discern from an OEM piece from looking at it after the car is put back together.
Performance: I can definitely notice a difference in comparison to the stock pulleys. It revs easier, synchro make 2nd to 1st down shifts smoother than before with less surge, and it definitely made power throughout the rpm range. The dynos below are including the gains from my AEM CAI. CAI's are known to provide more power up top and not much below 6500 rpm where the stock intake starts to run out of breath. I have a dyno chart showing my baseline, then full exhaust, and then everything in my sig (not including M370). With the pulleys and intake, I gained an average of 10whp all the way up to 6500 rpm, and from there the gains are more substantial. This is most likely from the CAI showing it's performance advantage over the stock intakes. There are no squeaks or noises coming from the pulleys, and the engine feels very smooth throughout the rpm range. It feels like what Nissan should have done in the first place. My voltages are consistent and the same as well.
Conclusion: I bought these from NST on a group buy a while back for $190 and I spent $24 buying the appropriate belt off of Amazon (was cheaper). It is hard to get a better value (minus install costs) for the money than these pulleys. I doesn't just make power in the mid range or up top, it's everywhere. I don't need to sacrifice drive ability, start ups, voltages, harmonics, nothing. This is a nicely engineered kit that removes every negative connotation we've all heard about crank pulleys.


Dyno 1, red line is with LTH, Y pipe +cat, and exhaust. Blue line is everything in my sig (no M370).

Dyno 2, Blue is baseline, red is LTH, y pipe + cat and exhaust, green is everything in my sig (no M370).

Very nice write up. +1 I couldn't agree more. The pulley sets seem to get bashed, but it is one of the best bangs for the buck out there.

Thank you SS_Firehawk for the awesome review!!! Much appreciated.

And thank you LafitteZ and 370ZilverZ for the compliments. You guys rock!


MIKE @ NST

Any deal on these? How much is the whole package including the appropriate belt shipped to 92126? Thanks!

^ agree,wondering the same thing. feel free to pm with info

Just curious, but what did they come out SAE? DIN gave you a pretty big CF, presumably to compensate for elevation.

Unless this is a dampened pulley, I'm not sure what you mean here.

SAE dyno posted below. Blue is baseline, green is LTH and CBE, red is aforementioned with pulley's and CAI.

I currently have a bad pre-cat O2 sensor on the passenger side that may have been damaged from the Header install. So gains may be higher after it's fixed. I currently have one on order.

With your second question, I was referring to the phantom theories of harmonic vibrations when running pulley's with this particular engine. I felt no noticeable changes to NVH when the pulley's were installed. The only sound it made was some creaking for about 30 minutes after install. My voltages are 100% the same as stock, the belt (NST sells a slightly smaller belt) is tight, and have no issues with the few thousand miles I have on it. Then again, it's still relatively early.

A harmonic balancer looks way different than the stock pulley. The rubber gasket on the stock pulley may have been a cautionary addition. I'm no engineer, but if it was so important, why isn't it sold with aftermarket pulley systems? Especially if it had the chance to "destroy" a motor if it didn't have this magical rubber ring :)

Thank you for the review and for posting those SS, much appreciated!

Your review and your dynos resonate with what hundreds of other NST pulley owners have been saying over the past few years. High quality, great performance, excellent value.

The topic of harmonics, vibrations, etc. have been covered in great detail earlier in this thread. Anyone interested can scroll back through this thread for detailed info. But, in short, NST pulleys will not lead to any harm on this engine.


We list these pulleys on our website, along with info and pricing, shipping is automatically calculated by our online shopping cart at the time of each order, and we'll be offering FREE shipping specials for most of the summer this year: http://www.nonstoptuning.com/NSTPULLEYS/pKitNis370.html

We also offer pulleys for many of the other popular Nissans: 350Z, 240SX, GTR, etc.

The 370Z kit is a very popular one in our catalog at this time and we've had trouble keeping up with demand this year. Unfortunately, we are sold out as of this writing but we do hope to have our next batch available for shipping within the next four to six weeks. Anyone interested can place an order on our website or contact us by phone for more info.

Thanks again, best of luck with all your projects everyone!!!


MIKE @ NST

Purchased
 

Read through all the posts, you have answered everything thrown at you and I still see good reviews of the product. I just purchased the kit..

I hope the problem SS_Firehawk had with his pulley being to tight was just the powder coating.. Have you looked into that issue yet? I would hate to throw the balance off doing it myself in the garage. Shouldn't be an issue if it ships ready to mount..

Can't wait to put them on..:happydance:

Mike lmk when you get these back in stock. I still need to get mine!

Thank you sir! Much appreciated.

Unfortunately, we are sold out of our kit at this time. More pulleys are in the production process and are expected for shipping by late AUG. All back-orders/pre-orders will ship ASAP and tracking info will be emailed.

We do manufacture our pulleys to tighter tolerances than the OEM pulley. The NST pulley will fit more "snug." 99% of the time your NST pulley will be a direct fit and will require no sanding, but in very very few instances customers have had to sand a bit of anodizing away from the center (bore) of the crank pulley. This is nothing to be concerned about... again, it applies to less than 5% of our customer base.

Thanks again, best of luck with all your projects!


MIKE @ NST

Thanks for the response, can't wait.. Looking forward to the gains..:driving:

Almost Late August:tup::tup::tup: I can taste them!!!! :leghump:

Wanting to hear your gains with the NST as soon as you get it.:tup:

Are these kits in stock?

I ordered in June, still waiting. I know its worth the wait. It just sucks waiting. I got an email that said end of September hope its going to happen!!!:driving:

I've been trying to reach them Via Email, Calling with Voice Mail and still with no response. They said the same thing, mid September it's now October. What's the deal NST?

I'm really sorry for the delay guys. It's been a crazy summer.

Our 370Z kit will be in stock and ready for immediate shipping by the 10th of October.

As always, feel free to order from our website if interested.
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NST - The Leader In Nissan 370Z Pulley Development


MIKE @ NST

Quick question to NST.
I was reading a couple of the earliest posts, and i remember seeing that it helps the MPG.
I guess it doesn't really matter but its always nice to see an improvement on gas. Just wondering how much more mpg you were talking about?
Id figure, 1-2 mpg increase?

That's correct. Apx 1-2mpg increase if you keep your driving habits the same.

Thanks again!


MIKE @ NST

http://1.bp.blogspot.com/-CnGuknm4WU...k+you+note.jpg


Thank you Thank you THE 370Z for the recent inquiries and orders. Much appreciated!


MIKE @ NST

http://sphotos-a.xx.fbcdn.net/hphoto...77169963_o.jpg

The NonStopTuning Nissan 370Z Kit is finally back in stock! Back orders and pre-orders started shipping today and will continue over the next few days.

Orders that come in this weekend will receive a FREE sample of the latest energy drink, gasolineenergydrink !!!

Thanks again ladies and gents. Your help and support of our brand is much appreciated and we are proud to have you as our awesome customers.


MIKE @ NST

woo just got a email saying mine has been shipped.

any left in stock?

Yes! We have a good number of these kits in stock.
And FREE gasolineenergydrink with any order placed this weekend!


MIKE @ NST

Anyone have any pics to share of your recent NST + gasolineenergydrink packages?!


MIKE @ NST

never got the gasoline drink :(

but anyway can someone repost the diagram of the belt installation please, i cant seem to find it anywhere. Thanks

About to order the kit but did guys get special forum pricing or did the price just go up $29 from $199 ? Thanks.

There was an old group buy last year for around that much, but the price has been the same for at least a year and a half.

Is it me or is it difficult to get a hold of these guys on the phone? Been trying to check the status of my order. :-(

They have the most random hours

Yeah Ive been calling between 12 and 6 PM amd left them a couple messeges. No luck

I've had the same issues with them before. From my experience they do check up on the forums often and will occasionally respond.

Keep checking up on the forums.

Keep trying their pulleys look awesome on the motor

Man they do look great. .!!! Did you rebuild/build your motor? But yeah I ordered a set of black ones about 3 weeks ago. Can't wait to get them and install them...!!

Finally got a hold of them. Should have them in my hands by next Tuesday. Can't wait

Just curious. Has anyone been able to get the crank pulley bolt off by putting it in 6th gear and standing on the brakes hard while using a breaker bar? That's what has worked on other cars.

Do you guys have any of these pulleys in stock? I tried calling several times but no one has answered.

I don't have a 6MT to do that with. Mine was a real bitch to take off, and the car was pretty new at the time as well. What finally got mine loose was locking the flywheel in place with a prybar wedged into the teeth/housing at just the right angle, and then lifting the handle of the breaker bar on the bolt itself with a floor jack (!!). The jack -> breaker bar actually lifted the front of the car a little bit up off the jackstands before the bolt gave way.

Another technique that I've successfully used on a very different vehicle, and which definitely won't win you any OSHA safety awards (but could win you a Darwin award!): Put a long/extended breaker bar on the pulley bolt, and get it locked/wedged against the frame of the car (in the appropriate rotational direction...), and then go bump the ignition switch to spin the starter for the breaking torque. That was on a car that didn't have spark and fuel hooked up yet, and you definitely need the spark power disconnected. Actually having the engine catch and fire up during that would be pretty bad. Even then, there's a pretty decent risk of throwing a projectile breaker bar out at high velocity and damaging something/someone.