Nissan 370Z Forum - View Single Post - NST (NonStopTuning) 370Z VQ37HR Pulley Kit Review w/ Dyno Charts

Spikuh · 11-21-2011, 06:10 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.

11-21-2011, 06:10 PM	#446 (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.