Lightweight pulley(s) good or bad?

[Escobar89]

Hello guys,
Time to put in the car in the garage for the winter soon, and i have a lot of ideas, where i will be spending my time for the next couple of months!

Yes, i have serached in the forum about this subject, but i didn't get much out of it though.

However, there is a lot of options to chose by here. I have seen that you can buy those cheap kit with pulleys from china for about 50usd, and i thought that even if it may be some bad quality, it wont hurt very much, if the crank pulley would fail, but then i readed that the oil pump is going by the crank pulley as well, so that might not be a good idea? There may also be some problem if the pulleys are not balanced, right? Maybe the best would be to buy proper quality from the ft86 shop, or should i just skip the whole idea and not change it at all? Just want to hear some input from other perspective here.

(as usually, i'm from Sweden. My English is not very well, hope you get the most text though)

Cheers!

[Bonburner]

Ah .. this topic.

[86TOYO2k17]

There are about 100 threads discussing this. I’ll give you the basic run down.
Ppl say it’s pointless.
Ppl say they can feel a big difference on butt dyno.
Ppl say subaru/Toyota say stock pulley has a balancer/dampener.
Ppl say stock doesn’t have a balancer/dampener.

Then the people with half a brain have researched and done the math/physics calculations to essentially prove its pointless, as well as stock does have a dampener ring on it.

Fluidampr Pulley can potentially reduce high rpm vibration/frequency especially the more none stock you are the more beneficial it potentially can be.
And oversized/underdriven accessory pulleys can free up close to 2hp.

Now you have at least 90% of all the information from 1000s of posts about this subject.

[humfrz]

Originally Posted by Escobar89

Hello guys,
Time to put in the car in the garage for the winter soon, and i have a lot of ideas, where i will be spending my time for the next couple of months!

Yes, i have serached in the forum about this subject, but i didn't get much out of it though.

However, there is a lot of options to chose by here. I have seen that you can buy those cheap kit with pulleys from china for about 50usd, and i thought that even if it may be some bad quality, it wont hurt very much, if the crank pulley would fail, but then i readed that the oil pump is going by the crank pulley as well, so that might not be a good idea? There may also be some problem if the pulleys are not balanced, right? Maybe the best would be to buy proper quality from the ft86 shop, or should i just skip the whole idea and not change it at all? Just want to hear some input from other perspective here.

(as usually, i'm from Sweden. My English is not very well, hope you get the most text though)

Cheers!

Hi Escobar89 -

There ain't nothing wrong with the pulleys that came with your car, so why mess with them.


humfrz

[Spuds]

If you are looking just for something to wrench on as a hobby, you can get decently made pullies that probably* won't break anything. You are going to see shortly all the various opinions on the effect of said pullies so I hope you are strapped in lol. Rule Number One of Pulley Club, you do not talk about Pulley Club.

It's not the pulley that fails, it's the things attached to the pullies that can fail due to a bad pulley/harmonic balancer (look that one up). This includes your crankshaft. You REALLY don't want your crankshaft to fail. I'll leave you to ponder that for the next few pages...

[Sapphireho]

Yes.

[Tcoat]

[chipmunk]

When designing an accessory drive system, the pulleys are an integral part of the calculations. Inertias of the pulleys act as dampers to the system.

(Same goes with flywheels - inertia of the flywheel dampens out crank torsional vibrations and resonances, and improves accessory drive performance)

[why?]

You absolutely did not search. You are absolutely a troll. We've had our battles on this. Cheap pulleys are not worth buying, they will absolutely break.

Go for the best made lightest pulleys and you will not have a problem as long as you do not add forced induction.

[Lantanafrs2]

Originally Posted by 86TOYO2k17

There are about 100 threads discussing this. I’ll give you the basic run down.
Ppl say it’s pointless.
Ppl say they can feel a big difference on butt dyno.
Ppl say subaru/Toyota say stock pulley has a balancer/dampener.
Ppl say stock doesn’t have a balancer/dampener.

Then the people with half a brain have researched and done the math/physics calculations to essentially prove its pointless, as well as stock does have a dampener ring on it.

Fluidampr Pulley can potentially reduce high rpm vibration/frequency especially the more none stock you are the more beneficial it potentially can be.
And oversized/underdriven accessory pulleys can free up close to 2hp.

Now you have at least 90% of all the information from 1000s of posts about this subject.

Well said lol

[FRSBRZGT86FAN]

Originally Posted by 86TOYO2k17

There are about 100 threads discussing this. I’ll give you the basic run down.
Ppl say it’s pointless.
Ppl say they can feel a big difference on butt dyno.
Ppl say subaru/Toyota say stock pulley has a balancer/dampener.
Ppl say stock doesn’t have a balancer/dampener.

Then the people with half a brain have researched and done the math/physics calculations to essentially prove its pointless, as well as stock does have a dampener ring on it.

Fluidampr Pulley can potentially reduce high rpm vibration/frequency especially the more none stock you are the more beneficial it potentially can be.
And oversized/underdriven accessory pulleys can free up close to 2hp.

Now you have at least 90% of all the information from 1000s of posts about this subject.

Also important note when you under drive the pulleys to the alternator and water pump, you gain a little bit of power but you sacrifice the performance of those accessories. You have less power coming out of the alternator and slightly less flow from the water pump.

[FRSBRZGT86FAN]

Originally Posted by FRSBRZGT86FAN

Also important note when you under drive the pulleys to the alternator and water pump, you gain a little bit of power but you sacrifice the performance of those accessories. You have less power coming out of the alternator and slightly less flow from the water pump.

Originally Posted by 86TOYO2k17

There are about 100 threads discussing this. I’ll give you the basic run down.
Ppl say it’s pointless.
Ppl say they can feel a big difference on butt dyno.
Ppl say subaru/Toyota say stock pulley has a balancer/dampener.
Ppl say stock doesn’t have a balancer/dampener.

Then the people with half a brain have researched and done the math/physics calculations to essentially prove its pointless, as well as stock does have a dampener ring on it.

Fluidampr Pulley can potentially reduce high rpm vibration/frequency especially the more none stock you are the more beneficial it potentially can be.
And oversized/underdriven accessory pulleys can free up close to 2hp.

Now you have at least 90% of all the information from 1000s of posts about this subject.

It wouldn't let me edit my post but also for the price of some of these crank and accessory pulley kits, you can easily get an OFT tune instead.

[Lantanafrs2]

Go another route. I would recommend waiting til next season, getting some fresh fuel in it and tuning it.

[86TOYO2k17]

Originally Posted by FRSBRZGT86FAN

It wouldn't let me edit my post but also for the price of some of these crank and accessory pulley kits, you can easily get an OFT tune instead.

The alternator and water pump are both overly engineered for stock and spirited driving. Now aftermarket sound system, running boost, or hard track driving this would need to be considered.

Also cost to benefit ratio or what order you should do each mod in is a different discussion. And assumes you know what he has and hasn’t done already or is planning on doing already.

But yes generally speaking, pulleys are low bang for buck. And should take a back seat until other mods of greater importance and value have been done.