NST Crank Pulley Reliability? [Archive] - Toyota Yaris Forums

Aothachos

02-04-2010, 01:10 PM

See if your tuners have anything to say about supposed damage potentially being caused by these light, undampened pulleys. I got a 10% underdrive on mine, and there have just been too many people raising concerns. Topic reared its ugly head recently over on MI as well. Ima starting to get a little nervous myself about leaving this pulley installed.

before i did it myself i have brought it to shops and they give me a bs story saying if they tighten on the crank it will break in half or damage and this and that problem. I did it myself with just a torque wrench and i jacked it up with the jack that came with the car not even a big one or anything like that, pull the e-brake really hard, took off the wheel where the pulleys where, too the fender off, and then did it risky but to get more power on tightening it i had to put my legs under the car, and pull really hard, yea i could've had my legs crushed but i knew it was holding perfectly fine. And I tightened it on, its been about 8 months I believe so far, no problems with my 10% underdrive, been through hot blazing weather and cold freezing winters, and the big snow storm we had in new york here, no problems. I think it just needs a new belt because the belt sometimes squeaks, or just tighten it im not sure.

I have the 10% underdrive one as well and its worth doing. My lights don't dim or anything with my A/c or heat on hi, with the window back defogger on, etc etc, no dim. 8 Months I have had it installed and probably done about 30-35 thousand miles.

cali yaris

02-05-2010, 02:04 AM

there have just been too many people raising concerns.

how many with actual concerns vs. theoretical concerns?

Besides the one guy (who did not prove cause and effect to me), I don't know of more real life evidence that an NST pulley causes any damage.

tk-421

02-05-2010, 03:31 AM

Well, I've had not one but two separate crank pulleys in my car, as well as the rest of the set, for at least 50K miles with no problems whatsoever. There's also a dedicated YW thread that has been open for years with 0 complaints.

If that's not proof that these pulleys are a solid product, then I don't know what is.

WeeYari

02-05-2010, 09:28 AM

Nowhere did I bash NST or this product. I have one which has been on for 6 months, and I had not expressed dissatisfaction with it. I'm sure you'll be as happy with it as the rest of us are.

All I made was a simple request to gather some information as there have been people whose opinions I, and many forum members respect, that have raised a caution flag with this mod.

RELAX!!

cali yaris

02-05-2010, 10:56 AM

weeyari you didn't answer my question. I didn't say you bashed, I asked for the real information you have.

You stated information, you didn't ask for it, as in:

there have just been too many people raising concerns.

WeeYari

02-05-2010, 11:12 AM

^^ outside of the YW entries we all know about, go to 4:03 pm (my timezone setting GMT -5) yesterday in your chatbox. This is the 2nd of two discussions in the past week. The first was much longer and indepth than yesterdays.

Maddog, I'm not here to pollute this thread. Seriously, enjoy your pulley.

Out.

cali yaris

02-05-2010, 01:26 PM

"so many" becomes "go look it up for yourself" -- LOL. I didn't ask for theory or discussions, I asked for real life reports.

how many with actual concerns vs. theoretical concerns?

I will leave the subject with my opinion that I know of only one person who actually reported damage "caused" by the pulley (maybe!), and a couple of hundred (at least) who are enjoying their Yaris pulleys with no adverse effects.

Hey if anyone wants to know negative, real stories about this pulley it's me - I sell the darn things. There just aren't any to report.

DerFlosser

02-05-2010, 01:40 PM

Does the stock crank pulley incorporate a vibratory dampener?

ozmdd

02-05-2010, 01:57 PM

Does the stock crank pulley incorporate a vibratory dampener?

No. The stock pulley does not have a large rubber component like you mike find on an older american V engine.

BTW - I think I'm almost to the 10K mile mark on the NST U-drive pulley with absolutely no ill-effects. Water pump is fine, engine runs smoothly and normally, all is well. I daily drive and autoX/time trials this car 2-4 times a month. :w00t:

cali yaris

02-05-2010, 04:24 PM

No. The stock pulley does not have a large rubber component like you mike find on an older american V engine.

yes it does! I posted a pic of that on here, I'll try and find it.

ozmdd

02-05-2010, 05:02 PM

Sorry, I thought it was agreed that it only has a very think rubber gasket between the inner and outer portions of the pulley, unlike the 1/2"+ thick rubber found in old harmonic balancers.
I know my oem pulley looks to have 3mm max of rubber.

cali yaris

02-05-2010, 05:30 PM

oh you're right, it is thinner than that for sure. The one on my stock pulley looks about 1/8" or so.

cali yaris

02-06-2010, 03:54 AM

Again there have not been anything that I have seen or read that a nst pulley has caused damage, but to say they cannot cause damage is just not an accurate statement.

Right --- there is no negative, real life data to report. And I don't think anyone has said they "cannot" cause damage.

DerFlosser

02-06-2010, 09:54 AM

I will only go so far as to say this...I, personally, would not use a non-harmonic dampened pulley when the motor was designed to incorporate a "harmonic dampened one.

cali yaris

02-06-2010, 01:34 PM

= flawed logic and stubborn refusal to connect theory with reality.

But it's ok, it's clear you would never, ever change your mind.

ozmdd

02-06-2010, 02:12 PM

Camelll - I guess I'd like to know what your point is in pursuing your bashing of the NST product? Are you a dissatisfied customer? Do you think you are somehow helping others with your theories? There is a ton of empirical data that supports the safety and effectiveness of the NST pulleys. There is virtually NO data to suggest the contrary. One person claims a water pump problem, but they haven't documented a connection. Hundreds of Yarii have the pulley and have no problems. I personally have over 10K miles on the pulley - including racing - and no problems.

You keep referring to theories and Toyota's design - which is certainly good design and intended to make the car as long-lived and reliable as possible, with as little warranty need as possible - but you seem unable or unwilling to acknowledge the proven nature of the NST design.

Again - what is your point/agenda?

People who install an NST pulley are looking for a safe performance improvement, and that's what they get. Do you really think you have a valid argument against that fact?

NonStopTuning

02-07-2010, 02:05 AM

On a relatively understressed near stock motor with bolt ons or low amounts of boost like what most of the people on this forum probably run, a solid pulley will not have any life threatening consiquences. The factory pulley with a 2mm (less than a 1/8th inch) damper is primarily there for wide band NVH (noise vibration harshness) supression from the engine and driveline. Removing the damper and replacing it with a solid pulley will lead to minor addtional NVH but will not harm the engine. In fact, most people claim their engines seem to run smoother with NST pulleys.

The engineering reasons are that most modern engines have a short, strong crank with, a relatively high natural frequency. The dangerous second harmonic that can cause damage occurs at an rpm that this sort of engine will never see, in the area above 10,000 rpm. Even the stock damper is not tuned for attinuation at this sort of rpm so the argument is somewhat of a moot point.

Now small engines that are pushing the limit with lots of revs, wimpy cranks, super long strokes, lots of boost and dwelling in the upper rpm ranges for long periods of time can benefit from a damper designed to deal with this sort of operation but our engine is not like this, and probably very few people with this motor on this forum push the envelope that hard. How many 1.5Liter, 400HP, 11,000RPM Yaris motors do we have on these forums?

As far as I can tell, our engine has a strong and stiff bottom end that is well built for our intended use. It has an internaly balanced crankshaft which is less like to break due to torsional vibration.

There are a lot of Nissan guys who use underdrive crank pulleys in road racing series like NASA or SCCA. Road racing is much more punishing on an engine than other motorsports. The engine is subjected to run times lasting 23 to 45 minutes with the engine always in the upper ranges of its rpm limit. One race weekend is the equivlent of hundreds of 1/4 mile passes.

NST sponsors the first ever wheel to wheel Scion tC NASA Road Race car. This car has been using underdrive pulleys from NST with great results since day one.

NST also sponsors two drift cars participating in the professional US drift series, Fromula Drift and D1GP USA. Both of these cars have been using NST pulleys with no issues of any kind for the past few seasons.

We could go on and on...

Is a solid crank pulley harmless to all engines? No it is not. Small, super high reving engines, when modified way past the simple bolt on stages may have problems. These engines reach critcal harmonics, past the 10,000 rpm range, an rpm often reached by certain race engines.

A mildly modded inline six will most likely be fine but one subjected to high rpm for long periods of time (90% of its life) with lots of boost will probably suffer. In this case , the stock balancer/damper is probably not adequate either.

Some of the older american V8 engines are externaly balanced and it is critical not to use a solid hub pulley not designed for these applications, or damage to the engine could result.

Our engines and most around here do not fall into the above catagories. Rest assured that your engines will not blow up and die or have a reduced life in street and even racing use with these parts.

I would bet that every "expert" that tells you otherwise has little personal, practical, real world experience with the subject.

NonStopTuning

02-07-2010, 02:07 AM

I can share the following real world info with you based on my personal experiences during my past decade of drag racing, road racing, and professional drifting...

Dan Gardner's NASA road racing Scion tC, backed by Scion, Toyota Racing Development, and NST has never had any issues while using a full array of NST products over the past few years...

http://www.nonstoptuning.com/images/DAN%20GARDNER/Gardner2008.jpg

NonStopTuning's turbocharged S13 drift car competed for several seasons in the Formula Drift Pro-AM and other drift series and never had any crank problems...

http://www.nonstoptuning.com/images/NSTcaseyINDEX.jpg

Tommy Suell's Formula Drift AE86 drift car was consistently ran at redline for several seasons and was putting down twice as much power as it did when the motor was in stock trim, and it never had any crank/bearing problems...

http://www.nonstoptuning.com/images/Cars%20Drivers/NST%20AE86%20TOMMY/NSTae86-4.JPG

NonStopTuning's custom turbocharged 4AGE 2009 D1GP USA drift car ran the entire season on the same engine, using the entire catalog of NST products for the 4AG, and never had any engine problems of any kind related to NST pulleys.

http://www.nonstoptuning.com/images/Cars%20Drivers/NST%20AE86%20WILL/NSTAE86-WP-0004.jpg

Not all aluminum pulleys are created the same, and no other pulley is an NST pulley.

NonStopTuning

02-07-2010, 02:17 AM

In addition, there are dozens of comprehensive NST threads where thousands of NST customer have posted their firsthand, real world, daily/track, experiences with our products on Hondas, Nissans, Toyotas, Scions, etc.

Theories are a great place to start, positive real world reviews from thousands of real world users is worth more in some peoples' books...

www.86garage.com
www.club4ag.com
www.yarisworld.com

www.scionlife.com
www.microimageonline.com
www.xr-underground.com

www.tercelonline.com
www.solaraguy.com
www.scikotics.com

www.8thcivic.com
www.tsxclub.com
www.fabricatedmotorsports.com

www.houston240sx.com
www.houston-imports.com
www.the370z.com

www.ourvq.com
www.n54tech.com

Thousands of real world reviews from real world customers using NST crank pulleys on various makes and models. No cases of engine failure.

Those of you who may be interested in reading other YW members' reviews can follow along in the following thread...
http://www.yarisworld.com/forums/showthread.php?t=4737

Good luck and have fun with all your projects everyone!

*MAD DOG*

02-07-2010, 06:45 AM

Getting my NST CR Lite Crank Pulley put on in 11 hours and 18 minutes and counting. NST FTW!

*MAD DOG*

02-07-2010, 06:48 AM

.....I own a pulley, garm can verify that. It is just not on my car........

Why have a NST pulley if it aint going on your car? Did you want to make a wall clock out of it or a liteweight paperweight? Do you have plans to put it on your car?

*MAD DOG*

02-07-2010, 06:51 AM

....No cases of engine failure....

Good enough for me.

talcum

02-07-2010, 08:40 AM

I'm surprised Camelll you aren't stressing more over the idea of some shlepp with a Wallyworld torque wrench putting on a new pulley? I mean if it isn't tight enough, there's your vibration. Would seem a lot more likely that the wrench would be out of cal, or the engine slipped on the last torque than the pulley was the problem.

Never forget the human factor.

ozmdd

02-07-2010, 10:52 AM

I'm done with this debate. As garm accurately noted many posts ago, camell isn't going to change his thinking, nor is he willing to hear anyone else. Apparently he believes he has some outrageous level of automotive engineering knowledge that far exceeds everyone else on the forum, and we're all idiots who have no experience whatsoever. Judging from his posts, I'd guess he spends most of his time doing exactly what he's doing here; sitting in front of a computer.
I personally have been taking engines apart and modifying cars for 26 years, when I bought and rebuilt my first car, a VW Fastback, so "yes", I know a thing or 2 about engines and how they function. I have a degree in Applied Physics and one in Environmental Geology, so I feel comfortable with numbers and forces. One does not need to be an automotive design engineer (which I doubt Camell is) to understand the relatively-simple forces involved in the internal combustion engine.
I think bashing (yes, your ongoing tirade against NST is "bashing") a vendor with good products and a desire to serve a relatively-small community (Yarii) and the folks who sell the products because you've learned a few cool engineering phrases online is pointless and sad. I do not believe camell is attempting to do a public service by repeatedly questioning the NST pulley. If camell is so sure about the need for a dampened pulley, then he should design and build one, then market it head-to-head against NST.
OUT.

DerFlosser

02-07-2010, 05:54 PM

...If camell is so sure about the need for a dampened pulley, then he should design and build one, then market it head-to-head against NST...
OUT.

Why would he do that when Toyota has already done it with the OE pulley? I think camell has some points here. I have spoken to and built multiple engines and have always opted to build and balance the motor with the stock (dampened pulley). None of these motors are from Toyota but they have been 4 cylinder, high revving powerplants. Although the noise might seem miniscule, so are engine and bearing clearances and unless a motor is torn down often for inspection, there is no way to tell what the reality is. Many racers (who race with lightweight crank pulleys) will NOT recommend their usage for the street. That, in and of itself, tells a story...

*MAD DOG*

02-07-2010, 07:17 PM

Just had the NST CR Lite Crank pulley installed at a mechanic. They quoted me $90 labour an hour. They did the job in just under 30 minutes and charged me $45 woot. :thumbsup:

First thing I noticed was when I put my foot on the gas pedal the car responded quicker and appeared to take off from a stop start faster and easier.

Then I drove around for a while with a big grin on my face and was very happy when a set of lights turned red (another chance for a take off test). I'm very happy with the NST product and would recommend it to anyone and everyone with a Yaris.

My wife has a 1.3 litre Yaris, I think the biggest gain would be on her engine. Maybe I’ll talk her into one of these and then get the 10% underdrive for myself. :biggrin:

NST FTW!

why?

02-07-2010, 08:37 PM

This question has always been absurd. people railing against NST because they feel power....

The onus is NOT on NST, it is on you. Proove that they cause damage, or go away.

cali yaris

02-07-2010, 09:22 PM

Why would he do that when Toyota has already done it with the OE pulley?

Because of this:

First thing I noticed was when I put my foot on the gas pedal the car responded quicker and appeared to take off from a stop start faster and easier.

If you've ever held both in your two hands, the difference is really obvious. :thumbsup:

cali yaris

02-07-2010, 09:22 PM

Camelll, you offered your pulley for $90 earlier in the thread. I'll buy it. :smile:

NonStopTuning

02-07-2010, 11:51 PM

why?

02-08-2010, 12:10 AM

Where have I said I feel power? I have just posted some info on vibration and harmonics. Well I guess knowledge is power, that is a pretty famous quote from some educated people. Read and study what I have posted and you see exactly why the pulley on almost every vehicle produced in the world is damped.

I do not bear the burden of proof, I am not the one who is gaining any benefit by doing what I am doing. If you think I am gaining by doing what I am doing then explain it to me. I am not the one selling a product. I am not the one who is claiming that my product will cause no damage to your vehicle unless you have a 400 hp, boosted and driven in an 11,000 rpm range constantly. I have also posted links to fact, yes I said fact. Undisputed published papers that show you harmonics and vibrations are bad and can cause damage. This is all the proof I need. If you choose to put one on your car after reading all the info that has unfolded out of this thread and you actually read it, then you have made an informed decision.

Everyone is entitled to their own opinion and you have yours.

you are being an internet bully, plain and simple. it obviously makes you feel good about yourself or you wouldn't do it.

The facts are out there, thousands of people using NST's products with maybe (maybe) 1 vehicle damaged. That is proof that NST's stuff is good, and that they know more than you.

The onus is on you to find real world examples that back up what you are saying. At this point your thoughts are worth less than what you do in a bathroom.

The ideas and papers you are posting are also worthless. Assuming that the oem does everything for safety is stupid. They also care about the cheapest possible. Among other things. The one thing we can guarantee is that the oem was not thinking about performance...

Bring real world proof to back up what you are saying, because you are making yourself to be a fool. Theory and reality have a long history of being exact opposites.

why?

02-08-2010, 12:22 AM

i see no opinions. i only see fact. You cannot state one certain case where an NST pulley has damaged a vehicle.

That is all.

why?

02-08-2010, 12:30 AM

if there are no documented cases then it cannot cause damage. That is the current rather sound working theory. Proven thousands of times over.

Your theory has zero proof. If you really think it is true do it to your own car. install the pulley then tear down the engine in 10,000 miles looking for damage.

*MAD DOG*

02-08-2010, 02:23 AM

This thread is amazing. First, bashing of NST products... then going into personal attacks against my degree of education, intelligence level, and downplaying the level of experience that I may have amassed over the past decade of racing and research and development.

I am all for posting information and facts and I'm always open to doing so, but after some of the insinuations and attacks that have been posted here, this will be my final reply in this thread. I will not post here after this reply.

On a side note, this may be the final month of NST paying fees to sponsor YW and sponsorship of the forums.

To those of you who have supported our products and brand, we appreciate your help and support very much. Good luck and have fun with all your projects everyone.

Mike,

It will be a sad sad day to see NST leave this forum as a vendor. After only having your CR Lite Crank pulley on my car for a few hours I don't know why I waited so long to get one. Smoother, faster acceleration off the line for such a simple mod. I'd like to thank you and NST for having the balls to make such a product. I could go on, but I'm sure you've read more than your fair share of positive testimonies.

Keep making products for the Yaris. Farewell.

fmicle

02-08-2010, 04:17 AM

Guys, remember the great intake debate (http://www.yarisworld.com/forums/showthread.php?t=22942&highlight=great+intake+debate)?

Debating Camell is somewhat of a futile endeavor. He's not too interested in the subject at hand, but rather in having the last word/post.

I remember him bashing my wikipedia links on the intake debate on the reason that wikipedia is a bunch of unverified statements made by simple people, yet he uses more than a dozen wikipedia links to support his tirade against NST pulleys...

As for the OEM pulley, I've seen what time and the elements do to rubber. They make it hard and brittle. There is no way that rubber ring will maintain its rubbery properties for many years, so I think it's quite safe to assume that after a while, the OEM pulley is just like a solid pulley... only MUCH heavier...

*MAD DOG*

02-08-2010, 05:01 AM

.... I remember him (camelll) bashing my wikipedia links on the intake debate on the reason that wikipedia is a bunch of unverified statements made by simple people, yet he uses more than a dozen wikipedia links to support his tirade against NST pulleys......

ROFL :laughabove:

tk-421

02-08-2010, 05:48 AM

As for the OEM pulley, I've seen what time and the elements do to rubber. They make it hard and brittle. There is no way that rubber ring will maintain its rubbery properties for many years, so I think it's quite safe to assume that after a while, the OEM pulley is just like a solid pulley... only MUCH heavier...

This is a very good point.

WeeYari

02-08-2010, 10:05 AM

WOW.

All of this because I simply asked *MAD DOG* to get an opinion on the subject from his tuner.

Unbelievable.

thebarber

02-08-2010, 10:44 AM

Unbelievable.
not really...

127.0.0.1

02-08-2010, 11:26 AM

Now for this, I have supercharger on my car, I am almost certain I already have some damage to the internals. But this supercharger was about 1/4 the cost of the car and certainly more than a new engine and it too is attached to the crank pulley. The same vibrations that can damage the crank can affect anything attached to the pulley via the belt and cause damage to that as well. I don't want to run an experiment that can damage my supercharger. Especially to open the engine up and see the damage that was probably there before the pulley. The burden of proof is not on me, I don't have anything to gain. Nothing, matter of fact I am getting flamed for it.

I just asked Mike a few questions, matter of fact here they are again.
1. how exactly did you determine our engine has a strong and stiff bottom end?
2. Do you drive a yaris?
3. Do you have an aftermarket solid pulley on all of your personal cars no matter kind of cars they are? If they are available.
5. If it can be proven and warranty work is denied because of your pulley, are you gonna cover the cost of repairs?
6. Did you take apart a stock new 1.5 liter 1nzfe engine and document what it looks like before the install of one of your pulley's and then do the same after some thousands of miles of driving more aggressive with the pulley installed?
7. To those who have installed the pulley's, have you taken apart your motor to see if there is any damage from your pulley? This is the only way to tell if there is any damage at all? Of course unless failure occurs.
8. Is it cheaper to manufacture a multiple piece pulley or a solid pulley?
9. Is it possible to have a completely balanced engine?
10. You really think that a damper in the crank pulley is a moot point? Toyota knew that this car in stock form is generally not gonna see above 5000 rpm constantly but yet they still put a more expensive design and use a damped pulley. I know that the damper also cuts down vibration in to the cab, which is what you are talking about NVH but vibration in a balanced engine is not good, not to mention they balance the engine with a damped and much heavier pulley on the crank.
11. Do you have any college degree's? If so what was the major and minor?

12. Are you an automotive engineer?
13. How much research and development went into the yaris aftermarket pulley?
14. Did you just measure a stock one and input into a cad program?
15. Does your company own a yaris?
16. If not how did you do the research?

There they are in all their glory, 1-11 made mike mad enough that he was not gonna reply to the thread anymore and not be a vendor anymore. I don't want specifics but I think it is fair to ask these questions to someone who makes a product and sells it to make a profit and who also says that their product cannot cause damage unless it is 400 hp boosted and spends most of its time in the redline and that redline is 11,000 rpm.

I am not calling out his education or his experience as he seems to think, he don't have to answer any question he don't want. Obviously he don't want to answer any of them.

:cry:

Astroman

02-08-2010, 01:04 PM

Ah, the great "what if" scenario. I've had over 50k miles of trouble free operation with the complete pulley set installed. There's my real world data.

*MAD DOG*

02-08-2010, 02:09 PM

WOW.

All of this because I simply asked *MAD DOG* to get an opinion on the subject from his tuner.

Unbelievable.

Don't blame me for this. You went...... :offtopic: :wink:

WeeYari

02-08-2010, 02:24 PM

Off-topic...not really.

Your original post.

I have an appointment at a mechanic for Monday 9am to finally get the NST lite crank pulley I bought off tk-421 put on my Yaris. :smile: Looking forward to it and will post results. :thumbsup:

Part of posting results could have been insight from your mechanic. Who knows, he may very well have given this thing a :thumbup: endorsement.

Anyhow, this has made for some entertaining reading, and nothing but the same old, same old has come out of it.

cali yaris

02-08-2010, 02:27 PM

+1.

why?

02-08-2010, 02:35 PM

definitely entertaining.:bellyroll:

ROCKLAND TOYOTA

02-08-2010, 04:15 PM

WOW.

All of this because I simply asked *MAD DOG* to get an opinion on the subject from his tuner.

Unbelievable.

not really...

yeah we know if this was MICROIMAGE there would be topics about hooking up AVEO'S and what garm has done next with your money.....

cali yaris

02-08-2010, 04:49 PM

The Aveo turboblasterchargeradaptor is selling really well, thankyouverymuch.

Yoda

02-08-2010, 10:35 PM

Hi i am an engineer. camelll is right to an extent... Toyota builds there cars to last longer than there competitors. Thats how the make bank along with mpg. Any modification made to our car that is not an upgrade in durability AND quality, will shorten the life span of our car. Learned in my automotive class. The question is by how much. I have the pulley and love it. I know some Yaris owners that have the pulley and after 100k miles have not had a problem as a result of it. That makes me thing the product is reliable for the purpose it serves. NST made a reliable product and it should end right there IMO...

Kaotic Lazagna

02-08-2010, 10:46 PM

The Aveo turboblasterchargeradaptor is selling really well, thankyouverymuch.

:laugh::laugh::laugh: Love that word.

MiniTRD

02-09-2010, 02:38 AM

Just saw this thread -

just a question for the OP

do you only get Toyota branded parts, fluids, etc?

because I'm certain that not all oil manufacturers have tested a yaris at different mileage. so by using your logic, their statements about engine protection might be false. . .

you can apply the same logic to any sort of part or fluid that isn't a Toyota product. . .

so what's the point about continuing to badger NST on a public forum? a lot of your questions were better suited to a PM instead of creating a soapbox here. I mean most people call the company directly instead of getting them to respond to a forum on a specific car

just my thoughts and I'll shut up now

bzinn 1

02-09-2010, 03:20 PM

30000 miles with them on my Scion and never a problem car has IHPE....best mod was the pulleys it really cleaned up the of the line acceleration........There are guys running them on their xBs and xAs on scionlife for over 100000 miles and no problems,same motor we got short of throttle body.......the thread on scionlife is well over 70 pages of discussion and hundreds of owners with the very same thing to report.........no problems.

One thing no one has considered is how long the rubber dampner on a stock pully that is 2mm thick will last .......pop one off a motor with 50000 miles on it and it is starting to wear out.....

Once the dampner wears it does nothing for the crank or bearings to reduce harmonics.

Toyota over built every motor since day one to do one thing and do it well.......last for a longer time than any of the compitition......

NST has built a great product and it works and that is a fact.........will the motor last a shorter time........possible yes.......but how long was it going to last to begin with depends on how it is used,how it is maintained,and many more factors.

Altitude

02-09-2010, 09:13 PM

I have only stated that it can.

My car can explode given the right circumstances, but that doesn't stop me from taking the risk of driving it.

I'm having a hard time understanding your argument when you have a supercharger on your engine. You implied that the reason you installed it - despite the known risks - is because the manufacture freely admits (or at least doesn't dispute) it may cause a problem. Your main point of contention for not installing the pulley is that NST hasn't publicly stated it may cause a problem - or maybe it's that when asked they reply "empirical evidence shows the pulleys to be a high quality product and we have little or no complaints." Either way, you need to find a better excuse.

There are plenty of people that think installing an SC on the Yaris isn't worth the risk (myself included) yet you don't see any of us bitching at the manufacturers or those that have them installed.

If you don't want to install the pulley because you think it's bad for your engine then don't do it and just leave it at that.

Astroman

02-09-2010, 09:34 PM

cali yaris

02-10-2010, 12:22 AM

Do you think our engines were built using the specs of a balanced engine?

You already know that there is no concrete definition of that. There is quite a bit more balancing that can be done with this motor. I know, I've done some of it.

So, you continue to argue from points you know aren't solid. It's a vapor argument, and by this point everyone on this thread can see it. This is my last post on it, and of course.... you may have the last word. :smile:

*MAD DOG*

02-10-2010, 01:33 AM

Just about to click "unsubscribe" from this thread. I'd rather put a gun in my mouth and paint the walls with my brains then continue to read this drivel.

o2cavyss

02-10-2010, 01:37 AM

While I don't agree with how Camelll has continued with all this, I have to agree that his questions to NST are not unreasonable. But even if the answers aren't what you'd want from someone building parts for cars, at this point there is more than enough proof that these are quality products. And, to be fair, anyone modifying there car should understand that they are making changes to the plan that Toyota engineers planned and tested to meet whatever needs they had (cheap and reliable) in order to make them the most profit. ANY mods will inherently have an impact on the car's reliability, and in almost all cases adding power increases stress loads on the engine/drivetrain and lessens the life of all affected components. ANYONE modding a car assumes that risk.