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

XwChriswX · 08-12-2011, 10:03 AM

Quote:

Originally Posted by red6spd

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?

wstar · 08-12-2011, 11:45 AM

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: STILLEN lightweight crank pulley

XwChriswX · 08-12-2011, 02:39 PM

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...

wstar · 08-12-2011, 03:20 PM

Quote:

Originally Posted by XwChriswX

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...

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.

NonStopTuning · 08-23-2011, 07:58 PM

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

quicksilver08 · 09-02-2011, 08:25 PM

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.

NonStopTuning · 09-09-2011, 01:25 PM

Quote:

Originally Posted by quicksilver08

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

makbc · 10-07-2011, 05:04 PM

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

stanley79finn · 10-09-2011, 02:44 AM

Ths for sharing this pics.

NonStopTuning · 10-31-2011, 03:14 PM

Inventory levels running VERY low on pulleys now. Please hurry if seriously interested.

Thanks everyone!

MIKE @ NST

SS_Firehawk · 11-01-2011, 12:16 AM

PM crank and alt pulley to 89113 please

NonStopTuning · 11-01-2011, 01:41 PM

Quote:

Originally Posted by SS_Firehawk

PM crank and alt pulley to 89113 please

NST - The Leader In Nissan 370Z Pulley Development

MIKE @ NST

NonStopTuning · 11-16-2011, 09:31 PM

Any other reviews from recent customers would be much appreciated!

MIKE @ NST

Spikuh · 11-21-2011, 05:10 PM

I'll offer up my .02 real fast since I had these put on last Saturday.

Woke up around 8:00 am and set out for the short 3 hour trip to Houston to pick up the parts and have them installed. I wanted the install done by them since these were their parts and all. On the way out though, I pulled over and took a quick video of how well the car reved up in neutral after it had time to get up to operating temperatures. Did a few quick pulls before continuing on.

Once I got there, picked up the pulleys and belt and ended up having a different shop do the install as NST had a hiccup on their end. They said the shop did good work and had done this install before so I went with it. Install took about 2 hours and then I was on my way back home. Once I got back into town later that evening I took another quick video of how well the car revved up with the new pulleys.

I will work on getting the videos uploaded soon, but it is going to be contigent on when my friend has some free time as I want to edit the videos together where everyone can visually watch them rev together and see the differences.

The things I noted are:

-Pulleys did free up some power.
-No change in sound from the engine or anything. Everything sounds just fine.
-The stock pulleys are HEAVY!!!! My goodness they were heavy in comparison...
-Revmatching is a bit easier.
-IMPROVED GAS MILEAGE!!!!!!

I want to call special attention to this last one because I really feel that it is often overlooked when people discuss modificatioins to any vehicle and it really frustrates me because I am a stickler for maximizing the efficiency of a system, in this case the engine.

When I set out Saturday morning and got on the open road I reset the in car instrument that records average MPH and average MPG and drove very conservatively, trying to maximize my MPG. I originally planned to fill back up once I got to Houston and get a hard figure, but they unplugged my battery and it erased my trip numbers (o the joys of the digital age). However, the in car instrument showed a solid 27 mpg for most of the trip. Just for reference, the stated highway mileage is 26 mpg.

Post pulley install, I filled back up, reset the in car instrument and hit the open highway driving the same way. On the return trip I recorded a solid 29 mpg and verified it after getting home and filling the tank back up.

That is a solid 2 mpg increase or a 7.4% increase in gas mileage which is IMHO, pretty substantial. I will be keeping a close eye on the coming weeks to see if I get similar results under normal driving conditions.

As an aside, there was a section of driving where the speed limit was 55 mph for probably 5 minutes of time with pretty even terrain. Before the pulleys, I was seeing around 28.5mpg and after the pulleys I was seeing around 31 mpg, or about 9% increase in mpg.

NonStopTuning · 11-22-2011, 02:16 PM

Thank you for the very thorough review. Everything you have stated here is on par with what we have seen with our pulleys over the years.

Glad to see other real world pulley owners post their own independent results as well!

Thanks again for coming down and very glad to hear you are happy with your purchase.

MIKE @ NST

08-12-2011, 11:45 AM	#2 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3595	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: STILLEN lightweight crank pulley __________________ 7AT Track Car! Journal thread / Car setup details

08-12-2011, 02:39 PM	#3 (permalink)
XwChriswX WFLYIDNNE Join Date: Jul 2009 Location: In The Fastlane Posts: 50,648 Drives: 02 GDB WRX Rep Power: 452	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... __________________ Bonnie - Stage 2, Audio build coming this fall! R.I.P. Abby 3/29/10 - 3/30/14

08-23-2011, 07:58 PM	#5 (permalink)
NonStopTuning NOT AN ACTIVE VENDOR Join Date: Aug 2009 Location: USA Posts: 869 Drives: AE86 Rep Power: 17	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 __________________ www.NonStopTuning.com Offering the best in Pulleys, Clutches & Flywheels, Coilovers, and more. Be sure to keep up with us on the NST blog!

09-02-2011, 08:25 PM	#6 (permalink)
quicksilver08 Base Member Join Date: Jul 2011 Location: Buda, Tx Posts: 66 Drives: 08 Infiniti G37s 6mt Rep Power: 14	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. __________________ 2008 Infiniti G37s 6mt coupe Berk HFC, Magnaflow Catback, JWT Popchargers, H&R, Eibach, Stillen Sways, B&M short throw, 4.08 frontier gears, NST pulleys

10-07-2011, 05:04 PM	#8 (permalink)
makbc Base Member Join Date: Jan 2010 Location: LUSAIL QATAR Posts: 27 Drives: NISMO Rep Power: 16	hi, i sent you guyz an e-mail on info@nonstoptuning.com and im still waiting for a response,how can i contact you __________________ *2010 Brilliant Silver #0370* NISMO 370z :STILLEN G3 CAI - FI NON RES TEST PIPES - UPREV - M370 INTAKE MANIFOLD

10-09-2011, 02:44 AM	#9 (permalink)
stanley79finn Base Member Join Date: Oct 2011 Location: TX Posts: 3 Drives: 370Z Rep Power: 14	Ths for sharing this pics.

10-31-2011, 03:14 PM	#10 (permalink)
NonStopTuning NOT AN ACTIVE VENDOR Join Date: Aug 2009 Location: USA Posts: 869 Drives: AE86 Rep Power: 17	Inventory levels running VERY low on pulleys now. Please hurry if seriously interested. Thanks everyone! MIKE @ NST __________________ www.NonStopTuning.com Offering the best in Pulleys, Clutches & Flywheels, Coilovers, and more. Be sure to keep up with us on the NST blog!

11-01-2011, 12:16 AM	#11 (permalink)
SS_Firehawk Premium Member Join Date: Oct 2011 Location: Tampa Posts: 4,142 Drives: 13' Magma Red Nismo Rep Power: 7335	PM crank and alt pulley to 89113 please __________________ Old Car:GTM TSC'd 550whp / 410lbft tq @ 11.88PSI New Car: Under Construction

11-16-2011, 09:31 PM	#13 (permalink)
NonStopTuning NOT AN ACTIVE VENDOR Join Date: Aug 2009 Location: USA Posts: 869 Drives: AE86 Rep Power: 17	Any other reviews from recent customers would be much appreciated! MIKE @ NST __________________ www.NonStopTuning.com Offering the best in Pulleys, Clutches & Flywheels, Coilovers, and more. Be sure to keep up with us on the NST blog!

11-21-2011, 05:10 PM	#14 (permalink)
Spikuh A True Z Fanatic Join Date: Jul 2009 Location: The Ark Posts: 2,357 Drives: '09 370z Rep Power: 21	I'll offer up my .02 real fast since I had these put on last Saturday. Woke up around 8:00 am and set out for the short 3 hour trip to Houston to pick up the parts and have them installed. I wanted the install done by them since these were their parts and all. On the way out though, I pulled over and took a quick video of how well the car reved up in neutral after it had time to get up to operating temperatures. Did a few quick pulls before continuing on. Once I got there, picked up the pulleys and belt and ended up having a different shop do the install as NST had a hiccup on their end. They said the shop did good work and had done this install before so I went with it. Install took about 2 hours and then I was on my way back home. Once I got back into town later that evening I took another quick video of how well the car revved up with the new pulleys. I will work on getting the videos uploaded soon, but it is going to be contigent on when my friend has some free time as I want to edit the videos together where everyone can visually watch them rev together and see the differences. The things I noted are: -Pulleys did free up some power. -No change in sound from the engine or anything. Everything sounds just fine. -The stock pulleys are HEAVY!!!! My goodness they were heavy in comparison... -Revmatching is a bit easier. -IMPROVED GAS MILEAGE!!!!!! I want to call special attention to this last one because I really feel that it is often overlooked when people discuss modificatioins to any vehicle and it really frustrates me because I am a stickler for maximizing the efficiency of a system, in this case the engine. When I set out Saturday morning and got on the open road I reset the in car instrument that records average MPH and average MPG and drove very conservatively, trying to maximize my MPG. I originally planned to fill back up once I got to Houston and get a hard figure, but they unplugged my battery and it erased my trip numbers (o the joys of the digital age). However, the in car instrument showed a solid 27 mpg for most of the trip. Just for reference, the stated highway mileage is 26 mpg. Post pulley install, I filled back up, reset the in car instrument and hit the open highway driving the same way. On the return trip I recorded a solid 29 mpg and verified it after getting home and filling the tank back up. That is a solid 2 mpg increase or a 7.4% increase in gas mileage which is IMHO, pretty substantial. I will be keeping a close eye on the coming weeks to see if I get similar results under normal driving conditions. As an aside, there was a section of driving where the speed limit was 55 mph for probably 5 minutes of time with pretty even terrain. Before the pulleys, I was seeing around 28.5mpg and after the pulleys I was seeing around 31 mpg, or about 9% increase in mpg.

11-22-2011, 02:16 PM	#15 (permalink)
NonStopTuning NOT AN ACTIVE VENDOR Join Date: Aug 2009 Location: USA Posts: 869 Drives: AE86 Rep Power: 17	Thank you for the very thorough review. Everything you have stated here is on par with what we have seen with our pulleys over the years. Glad to see other real world pulley owners post their own independent results as well! Thanks again for coming down and very glad to hear you are happy with your purchase. MIKE @ NST __________________ www.NonStopTuning.com Offering the best in Pulleys, Clutches & Flywheels, Coilovers, and more. Be sure to keep up with us on the NST blog!

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