NST Pulley Pre/Post Dyno (Must see)

Shark Tek · 03-17-2007, 02:20 AM

As I promise on the NST Sticky.

Last night I went to one of my local dynos, but before to post anything I want to state something very important. I know that readings are low but this dyno is notorious of reading 10-15whp less than other dynos of the same type (Dynojet). That means that the car is on the 190+whp range.

Back to the topic, you already know that out there are many people that say that pulleys are worthless that they do nothing. Other affirm that works very well. For that reason I decide to make a pre/post dyno the same day to clear up this myth specially on the K20Z3.

Non Stop Tunning Civic Kit
Now to the graph.

My Mods prior the pulleys are: Injen Cai, DC Race Header and Hondata IMG. The catback section is stock.

Ok guys, dont get too excited about the 3K RPM range increase, I'm not really sure that I was at full throttle on the run without the pulley set. Some runs shows a similar curve other dont show it. I just select the last run without and with the pulleys. As you can see there are some gains (up to 4whp) on many sections of the graph.

I'm including an attachment with all the runs (baseline to present) that I did on that dyno.
You will need WinPep to be able to plot the graphs.

I gave you everything I have, now be the judges.

Hope this post is useful for some of you.

reaper702 · 03-17-2007, 02:29 AM

so red = nst pulleys and blue = oem pulleys right?

hawaiian06si · 03-17-2007, 04:35 AM

nice, looks like this is on my list of thing to get. how much did you spend on them and where did you get it from?

mfinlay04 · 03-17-2007, 04:42 AM

Very nice!!! to gain 5 WHP with all those mods already is pretty amazing!!! I wounder how much it would bump up a stock K20?!?! This will def be my next mod. I'll be ordering it pretty soon. Hopefully the gains on the R18 will be just as good if not better. I don't know what the weight reduction is on the Si but I know it's 4+ lbs on the R18!!!

UDP FTW!

projectprelude · 03-17-2007, 08:02 AM

yeah i need to get on ordering these also...so much want so little cash..hmm credit cards callin my name :)

Shark Tek · 03-17-2007, 09:29 AM

Quote:

Originally Posted by reaper702

so red = nst pulleys and blue = oem pulleys right?

Yup look carefully in the graph below the max readings (max torque, max horsepower) I described my mods on each graphic.

ABM JDM · 03-17-2007, 10:39 AM

Great job with the dynos, THANK YOU!! Everyone's been waiting for someone to take the plunge and dyno these NSTs. I would expect then that the gains should be relatively bigger on R18s without many other mods, is this correct thinking?

Wow, now I am getting more and more swayed to go for it... my only remaining question is a matter of reliability and problems over time, since they've only been out less than 1 yr for 8thgens. I have concerns about what might happen to the engine over time and such. But I might not be concerned enough NOT to try them!

Tom1222 · 03-17-2007, 10:53 AM

If you do mostly city and stop and go traffic and very little highway I can see problems in the alternator not fully charging the battery.
But it should be minimal.

How hard are these to install? Did you install them yourself?

Shark Tek · 03-17-2007, 11:43 AM

^1

The ALT pulley is smaller too in such way that the rotation speed of the alternator stays the same than the factory lights. Dont worry about alt drain problems.

A/C works the same on idle as before, water temps stay on the same spot than with the stock pulley I didn't notice any difference on the accesories of the car.

We tried to follow this guide but the bolts of the alternator were very tricky to deal also the cranck pulley bolt was very hard, neither the impact pistol or the big hand ratchet were enough. We use the power of the car starter, the mechanic put a ratchet with a the corresponding socket on the crank bolt and by starting with a lot of care to not turn the engine on, we were able to unbolt the crank very fast.

You dont learn that on school.

Ep3racer954 · 03-17-2007, 12:11 PM

tight work man. i dynoed stock what your are dynoing with all those mods on a dyno jet... all i can say is, i cant wait to start modding my car

Robk20 · 03-17-2007, 12:38 PM

since UR pulleys are more underdriven , could it possibly show better results ?!

also, did this kit required a shorter belt ?

thx

Shark Tek · 03-17-2007, 01:02 PM

Yup it uses a shorter belt.

Gates # K070640 which is 1625 mm long

I dont think that there is going to be a huge difference of gains between UR and NST kits.

legendman · 03-17-2007, 01:50 PM

How's the driveability feel now? Does it rev a lot faster?

Robk20 · 03-17-2007, 01:56 PM

Quote:

Originally Posted by legendman

How's the driveability feel now? Does it rev a lot faster?

revs like a mofo after this ! lol

Tom1222 · 03-17-2007, 06:49 PM

Less Rotational Mass = Faster Revs. Wait until you switch to a Lightweight Aluminum flywheel

It will fly from 0-Redline in No time

Robk20 · 03-17-2007, 07:36 PM

Quote:

Originally Posted by Tom1222

Less Rotational Mass = Faster Revs. Wait until you switch to a Lightweight Aluminum flywheel

It will fly from 0-Redline in No time

i heard if you get both it s no good, i may be wrong thought

Tom1222 · 03-17-2007, 08:32 PM

Why would one not work with the other? They are two different mods.
That's just like saying an Intake wont work with a Catback or Your Fog lights will clash with your steering wheel

In this case you can have your cake and eat it too.

YOGIx213 · 03-18-2007, 05:49 AM

A link for those who may want to know of people who have been using NST on their rides for over 50,000 miles. It's from the Scionlife forums and they seem to be doing alright with them. I think this will be my next mod:

http://www.scionlife.com/forums/viewtopic.php?t=122725

Dwn4nythng · 03-18-2007, 06:40 AM

Ur and NST being almost the same depends ont hw weight and size of the pulleys. What were the weights on the NST crank and alternator pulleys? Stock SI cracnk is 4.5 lbs and the alternator is 9 oz's. UR's crank weighs a measely 11 oz's and the alternator is 4.5 oz's. That a big weight reduction. I have the UR's on my car and the gain with it is definately more then 4whp.

YOGIx213 · 03-18-2007, 08:10 AM

Quote:

Originally Posted by Dwn4nythng

Ur and NST being almost the same depends ont hw weight and size of the pulleys. What were the weights on the NST crank and alternator pulleys? Stock SI cracnk is 4.5 lbs and the alternator is 9 oz's. UR's crank weighs a measely 11 oz's and the alternator is 4.5 oz's. That a big weight reduction. I have the UR's on my car and the gain with it is definately more then 4whp.

Here is a link to NST's site that shows the weight difference from the stock R18 pulleys to the NST ones. Didn't see anything on the SI pulleys.

http://www.nonstoptuning.com/pKitHonCiv.htm

It says the R18 stock crank pulley is 74oz. and the NST crank is 24oz.

Stock Alternator Pulley: 8oz. NST: 3oz.

Stock Water Pump Pulley: 22oz. NST: 8oz.

03-17-2007, 11:43 AM	#9 (permalink)
Shark Tek Senior Member Join Date: Jun 2006 Location: Puerto Rico Posts: 649 iTrader: 0 / 0%	^1 The ALT pulley is smaller too in such way that the rotation speed of the alternator stays the same than the factory lights. Dont worry about alt drain problems. A/C works the same on idle as before, water temps stay on the same spot than with the stock pulley I didn't notice any difference on the accesories of the car. We tried to follow this guide but the bolts of the alternator were very tricky to deal also the cranck pulley bolt was very hard, neither the impact pistol or the big hand ratchet were enough. We use the power of the car starter, the mechanic put a ratchet with a the corresponding socket on the crank bolt and by starting with a lot of care to not turn the engine on, we were able to unbolt the crank very fast. You dont learn that on school. Last edited by Shark Tek; 03-17-2007 at 12:36 PM.

LinkBacks (?) LinkBack to this Thread: http://www.8thcivic.com/forums/bolt-ons-all-motor/32517-nst-pulley-pre-post-dyno-must-see.html
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03-17-2007, 02:29 AM	#2 (permalink)
reaper702 Senior Member Join Date: Jul 2006 Location: Sin City Age: 21 Posts: 3,818 iTrader: 6 / 100%	so red = nst pulleys and blue = oem pulleys right?

03-17-2007, 04:35 AM	#3 (permalink)
hawaiian06si Junior Member Join Date: Aug 2006 Posts: 19 iTrader: 0 / 0%	nice, looks like this is on my list of thing to get. how much did you spend on them and where did you get it from?

03-17-2007, 04:42 AM	#4 (permalink)
mfinlay04 Senior Member Join Date: Sep 2006 Location: Ontario Posts: 1,938 Matt Finlay iTrader: 3 / 100%	Very nice!!! to gain 5 WHP with all those mods already is pretty amazing!!! I wounder how much it would bump up a stock K20?!?! This will def be my next mod. I'll be ordering it pretty soon. Hopefully the gains on the R18 will be just as good if not better. I don't know what the weight reduction is on the Si but I know it's 4+ lbs on the R18!!! UDP FTW!

03-17-2007, 08:02 AM	#5 (permalink)
projectprelude Senior Member Join Date: Jan 2007 Location: wooster , ohio Posts: 2,396 Aaron iTrader: 3 / 100%	yeah i need to get on ordering these also...so much want so little cash..hmm credit cards callin my name :)

03-17-2007, 10:39 AM	#7 (permalink)
ABM JDM Senior Member Join Date: Feb 2007 Location: Indianapolis, IN Posts: 328 JDABM fan iTrader: 0 / 0%	Great job with the dynos, THANK YOU!! Everyone's been waiting for someone to take the plunge and dyno these NSTs. I would expect then that the gains should be relatively bigger on R18s without many other mods, is this correct thinking? Wow, now I am getting more and more swayed to go for it... my only remaining question is a matter of reliability and problems over time, since they've only been out less than 1 yr for 8thgens. I have concerns about what might happen to the engine over time and such. But I might not be concerned enough NOT to try them!

03-17-2007, 10:53 AM	#8 (permalink)
Tom1222 Senior Member Join Date: Jul 2006 Location: Indianapolis, Indiana USA Posts: 3,125 Tom Smith iTrader: 6 / 100%	If you do mostly city and stop and go traffic and very little highway I can see problems in the alternator not fully charging the battery. But it should be minimal. How hard are these to install? Did you install them yourself?

03-17-2007, 12:11 PM	#10 (permalink)
Ep3racer954 Senior Member Join Date: Aug 2005 Location: Pompano Beach, Fl Age: 19 Posts: 1,675 FG*SQUAD #87 iTrader: 3 / 100%	tight work man. i dynoed stock what your are dynoing with all those mods on a dyno jet... all i can say is, i cant wait to start modding my car

03-17-2007, 12:38 PM	#11 (permalink)
Robk20 Member Join Date: Jan 2007 Location: Montreal Age: 26 Posts: 72 Pascal iTrader: 0 / 0%	since UR pulleys are more underdriven , could it possibly show better results ?! also, did this kit required a shorter belt ? thx

03-17-2007, 01:02 PM	#12 (permalink)
Shark Tek Senior Member Join Date: Jun 2006 Location: Puerto Rico Posts: 649 iTrader: 0 / 0%	Yup it uses a shorter belt. Gates # K070640 which is 1625 mm long I dont think that there is going to be a huge difference of gains between UR and NST kits.

03-17-2007, 01:50 PM	#13 (permalink)
legendman Senior Member Join Date: Mar 2006 Age: 23 Posts: 645 iTrader: 4 / 100%	How's the driveability feel now? Does it rev a lot faster?

03-17-2007, 06:49 PM	#15 (permalink)
Tom1222 Senior Member Join Date: Jul 2006 Location: Indianapolis, Indiana USA Posts: 3,125 Tom Smith iTrader: 6 / 100%	Less Rotational Mass = Faster Revs. Wait until you switch to a Lightweight Aluminum flywheel It will fly from 0-Redline in No time

03-17-2007, 08:32 PM	#17 (permalink)
Tom1222 Senior Member Join Date: Jul 2006 Location: Indianapolis, Indiana USA Posts: 3,125 Tom Smith iTrader: 6 / 100%	Why would one not work with the other? They are two different mods. That's just like saying an Intake wont work with a Catback or Your Fog lights will clash with your steering wheel In this case you can have your cake and eat it too.

03-18-2007, 05:49 AM	#18 (permalink)
YOGIx213 Senior Member Join Date: Feb 2006 Location: Los Angeles,CA Posts: 665 iTrader: 0 / 0%	A link for those who may want to know of people who have been using NST on their rides for over 50,000 miles. It's from the Scionlife forums and they seem to be doing alright with them. I think this will be my next mod: http://www.scionlife.com/forums/viewtopic.php?t=122725

03-18-2007, 06:40 AM	#19 (permalink)
Dwn4nythng Senior Member Join Date: Sep 2006 Location: I shoot and ask questions later. Posts: 2,296 NorCal Meet Organizer iTrader: 1 / 100%	Ur and NST being almost the same depends ont hw weight and size of the pulleys. What were the weights on the NST crank and alternator pulleys? Stock SI cracnk is 4.5 lbs and the alternator is 9 oz's. UR's crank weighs a measely 11 oz's and the alternator is 4.5 oz's. That a big weight reduction. I have the UR's on my car and the gain with it is definately more then 4whp.