NST Pulleys + Automatic Transmission

[WeeYari]

In the main NST Pulley thread, there is a bit of dancing around inquiries about this product coupled with an A/T.

Given that it is currently a 335 post thread and having just suffered through a search to find information, I thought a new thread specific to automatic owners be started. Initially no modding was being planned for 2009, but if these pulleys on an A/T yield similar results to what M/Ts are claiming, I will probably entertain this mod.

Might be nice to be a member of the crowd chanting 'NST FTW!':wink:

[cali yaris]

What are your concerns? I think it's been well established that NST pulleys are high quality and generate a little bit of additional power. Maybe I can answer any further questions that you have.

[WeeYari]

No concerns really. I'm not concerned about the quality of the product as I, along with many others, suffered through the great pre-hack debate about NST vs OEM.

Like Mike in his pleadings for people to post up their experiences and reviews, I am looking for much the same but specific to installs on automatics.

[RagnaCaT]

The gains that you will see are the same as tha M/T only in your Power Range if an M/T doesn't breakit an A/T won't be close to breaking believe I got both tranny's at Home

[Jerkratt]

i had the lightweight crank on my automatic 07 when i had it before it got totaled... the other two pulleys where not avalible at the time.. i now have all three on my MT and there is a noticable differance with all three

[LtNoogie]

I have the pulley set on my AT LB. I put so many mods in the span of two weeks that I cannot attribute a specific improvement to any one mod. There was one mod that was not mistakeable in its effect, but it did require a few more dollars than the rest.

[Tamago]

has anyone dynoed on the same day with and without the pullies? or is everyone's info based on butt dyno? i run all stock pullies on my setup and have never really even considered lightweight stuff.. except my fidanza flywheel of course.

[xen555]

The gains that you will see are the same as tha M/T only in your Power Range if an M/T doesn't breakit an A/T won't be close to breaking believe I got both tranny's at Home

estoy a punto de comprar la 10% Underdrive Crank Pulley, vos decis que vale la pena la diferencia??? que mas le tenes al carro?

[Tamago]

estoy a punto de comprar la 10% Underdrive Crank Pulley, vos decis que vale la pena la diferencia??? que mas le tenes al carro?

si, senor, es muy explosivo

[WeeYari]

estoy a punto de comprar la 10% Underdrive Crank Pulley, vos decis que vale la pena la diferencia??? que mas le tenes al carro?

Can I have a translation please.

I see that you are getting ready to purchase a set and you're an automatic. Please keep me updated here. Thanks

[xen555]

Can I have a translation please.

I see that you are getting ready to purchase a set and you're an automatic. Please keep me updated here. Thanks

im asking if it worth the money this mod, maybe i order the pulley next week

si, senor, es muy explosivo

:thanks: alguna otra modificacion que me aconsejes?
estoy por abrirle completamente la parte de abajo del airbox
ya que le tengo puesto un K&N drop in filter
(consegui una en un yunker)

[cali yaris]

has anyone dynoed on the same day with and without the pullies? or is everyone's info based on butt dyno?

Holdener published dynos showing approx. 3 whp gain with the crank pulley. I *think* he was testing the 10% underdrive one.

[Klink10]

The first mod I did on my o7 with AT was the pullies....all 3. When the underdrive crank was introduced that went on. No problems at all.

It would be the butt dyno talking and it says there is a difference.

[NonStopTuning]

As I have stated several times... the principles of weight reduction and underdriving apply the same way, regardless of transmission type. Weight reduction is very noticeable when it is performed in the rotating assembly. The gains are there, and they are real. We have a large number of automatic owners buying these pulleys.... sadly, as much as I beg and bump and plead, people don't seem to want to post up...

Consider this analogy... Person A weighs 300lbs and goes on a diet, sheds 10% of his weight. Will he notice a difference? Person B weighs 250lbs and goes on a diet, sheds 10% of his weight. Will he notice a difference? The answer should be yes, they will both notice the benefits of weight reduction, even though they started out at different weights.

For those who don't consider pulleys a "worthwhile" modification... I find it interesting that many of the same people invest in lighter wheels, body panels, and especially lightweight flywheels. The concept is the same. In fact, weight reduction in the rotating assembly yields better gains than similar weight reduction performed elsewhere.

Good luck and have fun with all your projects everyone!

[RagnaCaT]

estoy a punto de comprar la 10% Underdrive Crank Pulley, vos decis que vale la pena la diferencia??? que mas le tenes al carro?

Si va a comprar ese pulley la deferencia va ser mas notable que pipa o intake pues mi carro esta STOCK pulley y un filtro TRD original.

[Tamago]

As I have stated several times... the principles of weight reduction and underdriving apply the same way, regardless of transmission type. Weight reduction is very noticeable when it is performed in the rotating assembly. The gains are there, and they are real. We have a large number of automatic owners buying these pulleys.... sadly, as much as I beg and bump and plead, people don't seem to want to post up...

Consider this analogy... Person A weighs 300lbs and goes on a diet, sheds 10% of his weight. Will he notice a difference? Person B weighs 250lbs and goes on a diet, sheds 10% of his weight. Will he notice a difference? The answer should be yes, they will both notice the benefits of weight reduction, even though they started out at different weights.

For those who don't consider pulleys a "worthwhile" modification... I find it interesting that many of the same people invest in lighter wheels, body panels, and especially lightweight flywheels. The concept is the same. In fact, weight reduction in the rotating assembly yields better gains than similar weight reduction performed elsewhere.

Good luck and have fun with all your projects everyone!

it's also important to note that the accessories under the hood turn at rates sometimes exceeding 3X that of engine RPM depending on the pulley ratio. weight reduction on these "higher RPM" pullies would definitely be beneficial, however, those pulleys are still turning "stuff" that applies resistance to your engine.

i went to a clutch/flywheel setup that was 5lbs lighter than stock (would have been more but i went to a stage3 clutch and that pressureplate was HEAVY) and i really didn't notice any power gains. revs dropped off faster (had to re-learn heel-toe downshifting) but the car really didn't feel any more powerful. that's one of the reasons i never did lightweight pullies, cost vs hp it just didn't add up for my very very cheap budget.

either way y'all make quality parts, and that's what matters!

[Aothachos]

trust me just get them, i have a AT sedan, i put the 10% underdrive pulley on first and tested it out for a couple weeks and it was such a good increase in throttle response and so much better. and then i had the water pump and alternator pulley installed and wow, power i felt a little difference but to me with this car is a big difference. I suggest it deffinatly

[eTiMaGo]

it's also important to note that the accessories under the hood turn at rates sometimes exceeding 3X that of engine RPM depending on the pulley ratio. weight reduction on these "higher RPM" pullies would definitely be beneficial, however, those pulleys are still turning "stuff" that applies resistance to your engine.

i went to a clutch/flywheel setup that was 5lbs lighter than stock (would have been more but i went to a stage3 clutch and that pressureplate was HEAVY) and i really didn't notice any power gains. revs dropped off faster (had to re-learn heel-toe downshifting) but the car really didn't feel any more powerful. that's one of the reasons i never did lightweight pullies, cost vs hp it just didn't add up for my very very cheap budget.

either way y'all make quality parts, and that's what matters!

Yep, in that sense the regular lightweight pulleys offer mainly the improvement of faster engine response (had to readjust my shifting too :laugh:), but the underdrive ones will affect the parasitic drag which does have a measurable effect on performance.

But back on topic, from what I understand, even the lightweight pulley on an AT leads to the transmission feeling much more lively. It won't be as noticeable a difference as with a MT, but it ought to help make the driving more enjoyable :smile: