I'm not sure if you guys know or not, but Unorthodox racing is supose to be comming out with a pully set for our cars in the next month or so. What do you guys think of them as a company when compared to Perrin (the other underdrive available)?

 

well, they dont make under drives for our cars yet, just light weight pullys, so if the pully is lighter than the perrin one it might be a good buy

 

unorthodox has been making them longer than perrin and they are good. very expensive but good.

 

does anyone know where are Perrin pullies made?

 

where did you get the info from, is unorthodox making a SET of underdrive pulleys or a lightened crank pully like perrin.
on a side note what is the concensus on the "harmonic balance" issue is the perrin really safe to use?

 

I spoke to Unorthodox directly. I am not terribly concerned with the harmonics issue because it is cheap enough to replace the 1NZ in the future (if it becomes an issue).
I never clarified, if they were just lightened, or underdrive. I know Unorthodox shies away from underdrive usually - so I would assume they are only lightened.
Is it worth the money for the pully though. I know I have seen quite a few with the Perrin at least.

 

people like it. it's a good mod.

as far as harmonics? the stock pulley would be a crappy harmonic balancer. besides motors nowadays are blueprinted. and pretty balanced out the box. or in the box shall i say. lol

 

I have been running my pulley for a few months and its fine...no extra vibrations, no noises from off balancing. I would definitely reccomend the perrin pulley if you are lookin to get a few more HP.

 

its a cheap enough mod too. Maybe I'll give it a shot

 

Im thinking I will too.

 

the only real differences between the perrin and stock pulley design is:
the weight
the spokes
and the timing marker

So unless the harmonic balancing issue has to deal with weight .. there should be no problems

 

Aren't these motors internally balanced? Someone in another thread posted they spoke directly with a dealers service department and Perrin and the concensus was the motors are internally balanced.

 

Unorthodox make very high quility products.

 

eggie. they ARE blueprinted motors . aka internally balanced.

 

perrin#1

 

Unorthodox does make good stuff but it is usually very expensive. I have some stuff from NST, www.NonStopTuning.com and I have really enjoyed the resutls. NST has a new pulley for the tC and there are some rumors that xA and xB stuff may be coming as well.

As far as pulleys go, here is some basic info. There are two benefits that can be had from an aftermarket pulley....
1. More HP. This is a result of Underdriving. Less power is sent to the accessories and more is left to drive the wheels.
2. Better throttle responce. This is a result of less rotational mass. You build the pulley using light weight aluminum instead of the heavy steel that Toyota uses.

To get more horespower AND better throttle responce you have to get a pulley that does BOTH.

 

Wouldn't lightening the recopricating assembly improve horsepower aswell as increasing throttle responce?
Perrin does state clearly:
Everything I've always read puts a huge emphasis on lightening the recopricating assembly for increased horsepower. Underdriving would help, but obviously they felt the gains wern't worth the added stress on your engine accessories.
I ordered my Perrin pully today BTW. Should be in next week. I'll let you know how it goes.

 

hmmm

 

well every blueprinted motor i've come across was internally balanced. maybe just on newer jap motors and semi newer not ancient euro motors.

 

I just checked on http://www.unorthodoxracing.com/ and it seems they have a pulley ready for our lil engines. Its an 'ultra S' underdrive pulley.

Crank Pulleys (Ultra S)
Code: 021212002
Price: $159.58

I'm interested!