NST (NonStopTuning) 370Z VQ37HR Pulley Kit Review w/ Dyno Charts

NonStopTuning · 04-13-2011, 06:09 PM

Any new user reviews, thoughts, or comments from recent customers would be more than welcome here.

Good luck everyone!

wstar · 04-15-2011, 06:30 PM

I put Stillen's underdrive pulley on my car ages ago (been on for 14K miles now btw, no issues at all with it, just FYI for those scared of pulleys). I'd rather stick with the Stillen one since it's already on the car, but I might try out your 10% overdriven alternator pulley just to bring my alternator back up to speed a bit (since I'm running that tiny PC680 battery as well).

Anyone have a clue about how belt fitment would work out on that combo? I'm guessing the tensioner can make up the difference using the belt length Stillen specified, doesn't look like a huge change on that little alternator pulley.

esfourteen · 04-16-2011, 01:08 PM

Quote:

Originally Posted by wstar

I put Stillen's underdrive pulley on my car ages ago (been on for 14K miles now btw, no issues at all with it, just FYI for those scared of pulleys). I'd rather stick with the Stillen one since it's already on the car, but I might try out your 10% overdriven alternator pulley just to bring my alternator back up to speed a bit (since I'm running that tiny PC680 battery as well).

Anyone have a clue about how belt fitment would work out on that combo? I'm guessing the tensioner can make up the difference using the belt length Stillen specified, doesn't look like a huge change on that little alternator pulley.

unless you aren't producing adequate voltage to charge the battery I wouldn't worry about it, size of the battery in this case will have more to do with CCA than holding a charge.

wstar · 04-17-2011, 12:49 AM

Quote:

Originally Posted by esfourteen

unless you aren't producing adequate voltage to charge the battery I wouldn't worry about it, size of the battery in this case will have more to do with CCA than holding a charge.

Let's just say, with a 20% underdriven crank pulley and a motorcycle battery, whether the battery gets sufficient charge to keep starting the car depends largely on how you treat it. If I start it up and take it for a decent drive every day, it's fine. If I leave it cold for several days, and then go through a few start/stop cycles in the driveway testing something, it can get to the point where it won't start pretty quickly.

There are a lot of inbetween scenarios where I barely have enough CCA left to get the car going again after several short trips without a long recharge run (esp if it has recently been left off for days).

NonStopTuning · 04-17-2011, 02:12 PM

Quote:

Originally Posted by wstar

I put Stillen's underdrive pulley on my car ages ago (been on for 14K miles now btw, no issues at all with it, just FYI for those scared of pulleys). I'd rather stick with the Stillen one since it's already on the car, but I might try out your 10% overdriven alternator pulley just to bring my alternator back up to speed a bit (since I'm running that tiny PC680 battery as well).

Anyone have a clue about how belt fitment would work out on that combo? I'm guessing the tensioner can make up the difference using the belt length Stillen specified, doesn't look like a huge change on that little alternator pulley.

Using our alternator pulley would be a good idea with your setup. And yes, you can keep the same belt that you are using now. A shorter belt would not be necessary with your setup.

wstar · 05-02-2011, 10:02 PM

Quote:

Originally Posted by NonStopTuning

Using our alternator pulley would be a good idea with your setup. And yes, you can keep the same belt that you are using now. A shorter belt would not be necessary with your setup.

Just an update on this in case anyone else was considering this idea (adding NST's alternator pulley to an existing Stillen crank pulley): it works out fine with the belt Stillen recommends for their crank pulley (Gates K070776). The tension indicator on the tensioner shows up on the middle mark, which is just barely in range for a new belt according to the service manual (and then you still have some allowance for the belt to wear out over time).

NonStopTuning · 05-11-2011, 03:03 AM

Quote:

Originally Posted by wstar

Just an update on this in case anyone else was considering this idea (adding NST's alternator pulley to an existing Stillen crank pulley): it works out fine with the belt Stillen recommends for their crank pulley (Gates K070776). The tension indicator on the tensioner shows up on the middle mark, which is just barely in range for a new belt according to the service manual (and then you still have some allowance for the belt to wear out over time).

Good to go!

quicksilver08 · 08-12-2011, 09:13 AM

Quote:

Originally Posted by wstar

Just an update on this in case anyone else was considering this idea (adding NST's alternator pulley to an existing Stillen crank pulley): it works out fine with the belt Stillen recommends for their crank pulley (Gates K070776). The tension indicator on the tensioner shows up on the middle mark, which is just barely in range for a new belt according to the service manual (and then you still have some allowance for the belt to wear out over time).

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

XwChriswX · 08-12-2011, 09:19 AM

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

wstar · 08-12-2011, 09:37 AM

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).

G37sHKS · 04-17-2011, 02:23 PM

Quote:

Originally Posted by NonStopTuning

Any new user reviews, thoughts, or comments from recent customers would be more than welcome here.

Good luck everyone!

Sure,

I bought the both pulleys and belt as well,

Installing them was rough but everything went smooth later, I definitely noticed that i gained power and torque once i took the car for a spin, great mod believe me..dont waste your money on light weight pulley that have stock size.. it wont do anything.. you "NEED" smaller size to let the magic of light weight pulley works..

I'm very happy with the purchase and i would buy it again with no doubt.

NonStopTuning · 04-28-2011, 04:38 AM

Quote:

Originally Posted by G37sHKS

Sure,

I bought the both pulleys and belt as well,

Installing them was rough but everything went smooth later, I definitely noticed that i gained power and torque once i took the car for a spin, great mod believe me..dont waste your money on light weight pulley that have stock size.. it wont do anything.. you "NEED" smaller size to let the magic of light weight pulley works..

I'm very happy with the purchase and i would buy it again with no doubt.

Glad to hear it! Welcome to the NST pulley club

04-13-2011, 06:09 PM	#1 (permalink)
NonStopTuning NOT AN ACTIVE VENDOR Join Date: Aug 2009 Location: USA Posts: 869 Drives: AE86 Rep Power: 17	Any new user reviews, thoughts, or comments from recent customers would be more than welcome here. Good luck everyone! __________________ www.NonStopTuning.com Offering the best in Pulleys, Clutches & Flywheels, Coilovers, and more. Be sure to keep up with us on the NST blog!

04-15-2011, 06:30 PM	#2 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3595	I put Stillen's underdrive pulley on my car ages ago (been on for 14K miles now btw, no issues at all with it, just FYI for those scared of pulleys). I'd rather stick with the Stillen one since it's already on the car, but I might try out your 10% overdriven alternator pulley just to bring my alternator back up to speed a bit (since I'm running that tiny PC680 battery as well). Anyone have a clue about how belt fitment would work out on that combo? I'm guessing the tensioner can make up the difference using the belt length Stillen specified, doesn't look like a huge change on that little alternator pulley. __________________ 7AT Track Car! Journal thread / Car setup details

08-12-2011, 09:19 AM	#9 (permalink)
XwChriswX WFLYIDNNE Join Date: Jul 2009 Location: In The Fastlane Posts: 50,648 Drives: 02 GDB WRX Rep Power: 452	What is the belt number so I can go pick one up this afternoon? __________________ Bonnie - Stage 2, Audio build coming this fall! R.I.P. Abby 3/29/10 - 3/30/14

08-12-2011, 09:37 AM	#10 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3595	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). __________________ 7AT Track Car! Journal thread / Car setup details

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