NST (NonStopTuning) Pulleys. Info, Specs, User Data...

[Jason@SportsCar]

Originally Posted by NonStopTuning

Perhaps a solid (no holes, no slots) lightweight crank pulley is worth a try, something that we have the ability to produce for race use - going past 7500rpm.

For street cars, our regular Underdrive Crank Pulley and NST CR-Lite Crank Pulley should be, and have proven over the years to be, sufficient.

Best of luck with all your projects!

The slots/holes were not the point of failure for us, it was the mounting point. There is very little cross section around the mounting hole, once the unit failed we could see that. The front and back cuts in that area left very little material in the corner, it was not as thick as the face of the pulley, and this is where it cracked.

After the NST failure I went back to the OE piece. Some time later we found the Beatrush unit, tried it on another motor and the Micro Image piece on our 2012. The Beatrush unit was much beefier, but ultimately still had an issue - I was very disappointed when we got it because we were given the impression it had an elastomer damper, but it did not, and it was nearly as heavy as the OE piece. Once we noticed a problem with the Beatrush (took almost a year) we went back to stock on both cars. It just wasn't worth the risk for us.

I believe the issue may be accessory related. Not having a self tension belt system on the 1NZFE means there is nothing to help absorb the vibration once you eliminate the dampened crank pulley.

I sure would like to see ATI or Fluidampr build one.

Our NST (the exterior damage is road rash from when it popped off and passed me on the track):


Beatrush, has a more material around the bolt area, but still has issues beyond 7300rpm:


When Micro Image designed its pulley they addressed the cross section/mounting point concern, and still managed to build a very light pulley, but we never ran one long enough to see if it would let us down:

[Jerkratt]

Not to hijack but I've been wanting to inquire about a fixed pulley for my blitz kit. I know one was made. And have had no luck trying to reach over the phone and haven't had a chance to email. Think you can help?

[cali yaris]

.

And have had no luck trying to reach over the phone

[Chuckie]

This is probably a dumb question but would like to ask anyway: What happens when a crank pulley, wp or alternator pulley fails on the road at speed..?

[Jason@SportsCar]

Originally Posted by Chuckie

This is probably a dumb question but would like to ask anyway: What happens when a crank pulley, wp or alternator pulley fails on the road at speed..?

When the crank pulley goes your engine will overheat, necessitating a head gasket replacement - really if any of them goes you are screwed because the belt is no longer spinning the others.

[Astroman]

My NST lite crank pulley has been working great for years however I'm not racing and have the stock rev limiter. My NST waterpump pulley though had a crack and a very very deep grove wore in from the belt and I replaced it with another NST pulley that was used.

[cali yaris]

What happens when a crank pulley, wp or alternator pulley fails on the road at speed..?

What Jason said, plus the fact that pieces of metal could be flying around either in your engine bay, under your car, or on the road. In Jason's case, they were also winning.

[1.5]

hahahaha ^^ he got beat by his own pulley lol

[Chuckie]

The NST pulley I bought. Sorry about the unglorified pictures. It is..solid... and beautifully made...

[TinyGiant]

Originally Posted by camelll

tiny I am selling a brand new red anodized crank pulley. It is the lite series not the under drive pulley. $85 dollars shipped. CLICK ME FOR THREAD.

i saw it :)

lol there isnt much that goes on here that i dont see.. im a "new posts" obsessive checker :)


right now i'm low on funds but in the future i might pick the set up :)