Anyone have issues with nst pullies
 

It's been a little time since these have been out, I haven't installed mine yet, I get different opinions here and there, has anyone had any issues with these or stillen pullies ?

I'm interested in this as well, looking at the nst after I do some other work.
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Iv had mine for a year and a half and no issues

Thanks for input.

No issues here. Before installing mine, I was skeptical and did a lot of searching and found that the reasons against installing pulleys are based on theory. Aside from an issue with a cheap pulley welding itself to the block, (which won't happen with the NST or stillen) i couldnt find one person with a motor issue that was caused by an aftermarket crank pulley. I know several people who have had pulley kits on their Zs for years with track duty and no issues. Go for it :tup:

i've had mine for about 1.5 years too. my Z is my daily but hasn't been on a track yet. it's been troublefree to the point where i forget it's there! zero wobbles.

most of the issues occur during installation.. the bolt is notoriously hard to crack and hard to tighten to spec. and some pulleys are a very snug fit

IIRC, the crank bolt is a non-reusable torque-to-yield fastener. If my memory is correct, make sure you use a new bolt.

Good point, you need to purchase a new crank bolt since it's a torque to yield bolt. As long as it's installed properly, it's a great mod.

there's a bit if debate re: reusing the crank bolt. i followed the service manual and bizzarely, it's not marked as a single use item. for mission critical stuff, i usually replace but in my planning before the job, i didnt buy one because the manual didnt say it must be replaced. Maybe it's marked as a single use item in the manual for other years? mine is a 2011

If the tightening instructions have "and then 1/x turn more", it's a TTY fastener and only meant for one-time use.

Edit: IMNSHO, if you have any doubts, put in a new bolt. Why risk it for a cheap bolt?

I have never ever seen an issue with reusing the crank bolt. I would reuse it in a heartbeat and never think a thing about it.

Way back when I had my 97 240sx I ran a light weight underdrive pulley for 70k miles with no issue. They are very popular on smaller light weight lower powered cars.

My installation tip is if you have a manual have someone sit in the car with it in the highest gear and hold the brake while you loosen and tighten the crank bolt.

3/4" drive impact makes it easy most of the 1/2" impact guns won't budge it.

That and some salad spoons to wiggle the pulley off the crank. Too bad you have to pull the whole radiator to use your impact.

Well last time i did a pulley motor was out of the car

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I've had it since I was on the group buy list and I haven't had any issues. I believe SS_FireHawk has a dyno with it's results as well.

I run the Stillen UD Pulley. Have ran it for 6 Auto-X events and 3 road course events with zero issues. Absolutel love the throttle rev response. It also holds your revs longer inbetween shifts allowing you to hold your RPMs higher avoiding engine bogging.

And you can buy mine:
http://www.the370z.com/parts-sale-pr...-kit-blue.html

Cheep plug :tup:

Wow, you have more NST pullies in stock than NST. :rofl2:

so its been 9 years since the last post, has anyone running these have issues? i scored a set New off facebook MP and now im 2nd guessing myself, if i should run them

Joey

They will break. Don't run it.

People had a lot of issues with them over the years.

As stated above, I believe NST had issues with their initial batch(es) of pulleys. I've been running my set since ~2016 with no issues. However, I intend to change to the ATI pulley whenever I boost my car in the future.

It's $10 for a new one. ;)

Crazy what people skimp on when installing hundreds or thousands of dollars worth of parts huh? :shakes head:

Airplane owners are the worst. Scary, I know.