ZPI or NST crank pully? - Page 2 - Toyota Yaris Forums

ChinoCharles · 02-23-2007, 02:21 PM

Sorry, I skipped right over that post.

Taken straight from the NST GB thread...

Quote:

1. Regarding Light Weight pulleys vs Underdrive pulleys.

There is a ton of info about these concepts on our website and I will share just a tad with you here, you can look on our site or ask me on AIM and I can explain more. Also a lot of this info has been posted elsewhere on the internet by many of our customers and friends...

There are two benefits to NST pulleys. One is weight reduction, the other underdrive. Weight reduction leads to extra throttle response and a bit of HP and TQ being freed up and sent to the wheels. Underdriving from the crank pulley means sending less power to run the accessories, thus sending even more HP and TQ to the wheels.

The pulley we are offering you guys is of the first variety, it is an OEM diameter, lightweight crank pulley. We call this CR-Lite.

I will share some pics with you in the near future, but know this for now... The design of your crank case and your OEM crank pulley make it very difficult to design an underdrive crank pulley small enough to actually do any underdriving! If we could do more for you, we probably would, believe me.

Also, an underdrive crank pulley would slow your A/C and alternator by a tad, and many of you complain about your A/Cs being weak as they are. Most of you do not seem to want them any weaker.

90% of the time I am actually in favor of an underdrive crank pulley... but after doing some research I have come to the conclusion that for your Yaris a CR-Lite may actually be the best fit and best option.

YarisGuy · 02-23-2007, 02:39 PM

Quote:

Originally Posted by CASTREX

Chino would you share a bit of that TON of knowledge...?

I don't know if this has been answered here before... but do you happen to know why NSt didn't underdrive their yaris pulley? Their Scion pulleys are underdrived. Just wanted to know if there's a reason for this.

I asked about this as well. This has been discussed on page 2 of the NST group buy thread:
http://www.yarisworld.com/forums/showthread.php?t=3239

My understanding is that a smaller crank pulley would not fit well on our car.

CASTREX · 02-23-2007, 02:44 PM

Thanks guys...!

Can't wait for my pulley to come... just a couple more weeks

largeorangefont · 02-23-2007, 05:01 PM

Quote:

Originally Posted by ChinoCharles

Okay, some of you still aren't convinced. Here is a couple more reasons.

First of all, weights...
ZPI pulley - 14.4 oz
NST pulley - 12.5 oz

Second of all, has anyone noticed that ZPI's pulleys don't come anodized? Hard anodizing does more than just make your pulley look pretty. It actually makes the pulley stronger. Aluminum is a rather soft metal by design, but hard anodized aluminum is stronger and will resist the sands of time better than untreated aluminum. ZPI will charge you 20 bucks extra to anodize your pulley. NST includes anodizing at no extra charge. They don't cut corners.

Charles,

Just a couple points here. I don't believe the NST pullies are HARD anodized. Correct me if I am wrong, I just hadn't seen that anywhere on the specs.

Anodizing is a chemical change on the surface of the alumnium. It does not actually make the metal stronger, just puts a tough wear resistant layer on the material. In hard anodizing, that layer is very similiar chemically to sapphire and it is more wear resistant than a regular anodized surface, or raw alumnium.

As I said above, the $5 extra for the anodized (hard or not) NST part is worth it in my book. It also seems the NST piece is a couple ounces lighter, which no one will ever notice one way or the other, but it is what it is.

magoo_lc1 · 02-23-2007, 05:42 PM

I say make your own choice. Do the homwork and buy the one you want. Competition only heps us all out. I dont think either would benefit us that much. Im not a engineer so there is a fantastic chance im wrong.

ChinoCharles · 02-24-2007, 02:32 AM

Quote:

Originally Posted by largeorangefont

Charles,

Just a couple points here. I don't believe the NST pullies are HARD anodized. Correct me if I am wrong, I just hadn't seen that anywhere on the specs.

Anodizing is a chemical change on the surface of the alumnium. It does not actually make the metal stronger, just puts a tough wear resistant layer on the material. In hard anodizing, that layer is very similiar chemically to sapphire and it is more wear resistant than a regular anodized surface, or raw alumnium.

As I said above, the $5 extra for the anodized (hard or not) NST part is worth it in my book. It also seems the NST piece is a couple ounces lighter, which no one will ever notice one way or the other, but it is what it is.

Ashley, I am 99% sure I was told that these are in fact hard anodized, but I will double check that information.

largeorangefont · 02-24-2007, 02:52 AM

Quote:

Originally Posted by ChinoCharles

Ashley, I am 99% sure I was told that these are in fact hard anodized, but I will double check that information.

If they are then all the better!!

YarisGuy · 02-24-2007, 01:57 PM

When in doubt, it might be wise to do a quick search of the manufaturer's website for information

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

Here's an excerpt:

Each NST Yaris Kit is carefully crafted from 6061-T6 aircraft aluminum, tested and balanced to high tolerances. Every NST pulley is hard anodized for exceptional durability and is a great item for use at the track or on the street. Available in your choice of colors: Red, Blue, or Graphite Gray.

ChinoCharles · 02-25-2007, 12:37 AM

There you have it.

eTiMaGo · 02-25-2007, 01:43 AM

Quote:

Originally Posted by ChinoCharles

There you have it.

yeah, n00b, search, dammit, you n00b

ChinoCharles · 02-25-2007, 01:47 AM

Thomas, you can start shit when my STICKER GETS HERE.

ROFL!

eTiMaGo · 02-25-2007, 01:57 AM

*whistles innocently, walks away*

ChinoCharles · 02-25-2007, 02:03 AM

We still love ya Thomas, you sexy French Yaris pimp you.

eTiMaGo · 02-25-2007, 02:14 AM

dude get yourself to bed, you're starting to scare me

elsteverino889 · 02-25-2007, 09:37 PM

NST!

evilreign · 02-26-2007, 12:37 AM

I've had NST products on my other ride and was very happy with them. Damn good value for the price. Plus their customer service was exceptional. I got very quick replies with any questions or support I needed.

NST FTW!

eTiMaGo · 02-27-2007, 09:54 PM

From ChinoCharle's DIY Thread:

Quote:

Originally Posted by ChinoCharles

OEM Toyota Pulley - 50.00 oz
ZPI pulley - 14.4 oz
NST pulley - 12.5 oz

The DIY has been edited to include this information. Thanks for your PATIENCE.

ZPI - 71.2% reduction
NST - 75% reduction

IMO with this small difference there should really be no tangible advantage between the two, especially when you consider other pulleys and the flywheel, so it should really be a matter of personal preference

ROCKLANDTOYOTA · 03-04-2007, 03:34 PM

is there any actual performance numbers for any of the yaris pully's????

02-23-2007, 05:42 PM	#23
magoo_lc1 Drives: honda civic hatch Join Date: Jan 2007 Location: missouri Posts: 144	I say make your own choice. Do the homwork and buy the one you want. Competition only heps us all out. I dont think either would benefit us that much. Im not a engineer so there is a fantastic chance im wrong. __________________ 91 SE-R. R.I.P old freind The influence of peers on individual behavior illustrates the seductive power of conformity And, I don't mind at all being looked down upon by purists. Indeed I don't mind at all being looked down upon by those whom I do not look up to at

02-25-2007, 01:57 AM	#30
eTiMaGo vroom vroom View User's Garage Drives: lil red 5-door Join Date: Sep 2006 Location: Bangkok, Thailand Posts: 7,744	whistles innocently, walks away __________________ The price of freedom of religion, or of speech, or of the press, is that we must put up with a good deal of rubbish. - Robert Jackson Bye bye 1NZ...

02-25-2007, 02:14 AM	#32
eTiMaGo vroom vroom View User's Garage Drives: lil red 5-door Join Date: Sep 2006 Location: Bangkok, Thailand Posts: 7,744	dude get yourself to bed, you're starting to scare me __________________ The price of freedom of religion, or of speech, or of the press, is that we must put up with a good deal of rubbish. - Robert Jackson Bye bye 1NZ...

03-04-2007, 03:34 PM	#36
ROCKLANDTOYOTA JOE GIRTH Drives: YARIS 3DOOR Join Date: Feb 2007 Location: ROCKLAND TOYOTA/SCION Posts: 369	is there any actual performance numbers for any of the yaris pully's???? __________________ http://www.carid.com/toyota-accessories/ site has a FEW interesting yaris items.....

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02-23-2007, 02:44 PM	#21
CASTREX Who said Yaris was slow? View User's Garage Drives: Yaris T-Sport 2008 Join Date: Nov 2006 Location: Costa Rica Posts: 1,287	Thanks guys...! Can't wait for my pulley to come... just a couple more weeks

02-24-2007, 01:57 PM	#26
YarisGuy Drives: 2006 Yaris Join Date: Dec 2006 Location: USA Posts: 203	When in doubt, it might be wise to do a quick search of the manufaturer's website for information http://www.nonstoptuning.com/pKitToyYaris.htm Here's an excerpt: Each NST Yaris Kit is carefully crafted from 6061-T6 aircraft aluminum, tested and balanced to high tolerances. Every NST pulley is hard anodized for exceptional durability and is a great item for use at the track or on the street. Available in your choice of colors: Red, Blue, or Graphite Gray.

02-25-2007, 12:37 AM	#27
ChinoCharles Banned Drives: LB Join Date: Jul 2006 Location: OH Posts: 7,787	There you have it.

02-25-2007, 01:47 AM	#29
ChinoCharles Banned Drives: LB Join Date: Jul 2006 Location: OH Posts: 7,787	Thomas, you can start shit when my STICKER GETS HERE. ROFL!

02-25-2007, 02:03 AM	#31
ChinoCharles Banned Drives: LB Join Date: Jul 2006 Location: OH Posts: 7,787	We still love ya Thomas, you sexy French Yaris pimp you.

02-25-2007, 09:37 PM	#33
elsteverino889 View User's Garage Drives: 2007 Yaris sedan black Join Date: Jul 2006 Location: MIA! Posts: 354	NST!

02-26-2007, 12:37 AM	#34
evilreign Drives: Yaris Join Date: Feb 2007 Location: TX Posts: 24	I've had NST products on my other ride and was very happy with them. Damn good value for the price. Plus their customer service was exceptional. I got very quick replies with any questions or support I needed. NST FTW!