They don't fit . Rolled my car up on the ramps today and got to work. The pulley looks like a nice unit. Very well made but, if you look closely at the stock unit and the Perrin unit. You will notice they are the same size on the Alternater belt side but totally differnt on the power steering side. The power steeering side of the Perrin pulley is alot smaller than the stock part. I said no problem because I had a few belts laying around that are a few mm shorter than the factory belt. When I went to put the pulley on, it wouldn't go on flush. It was touching the hump that is located on the engine. So I called up Vivid Racing where I got the pulley. They told me they wouldn't be able to give me any info about the pulley till Monday. That stinks, how could you make a part without checking for fitment issues such as this one. So I put my stock pulley back on and boxed up the Perrin unit which I will be sending back to them on Monday after I speak with someone. Wasted about an hour today for NOTHING!!!!

 

just an hour? heck think of it as you discovered an issue and forewarned anyone else who was planning to get that particular part.

I understand the upset part tho.

 

looks like we got a real problem here, I was so close to gettin those things and now I am gonna hold off until your report monday.

 

Definitely thanks for posting. I too was really close to ordering that pulley as well. This together with the fact that they didn't make the effort to put the timing mark that is on the OEM pulley and the fact that it is not harmonically balanced made me reconsider. Anyways, I 'm defiantly interested in what you find out on Monday. Keep us posted.

 

like i said dont use it.....doesnt dampen harmonic vibration....the stock pulley does....if you want take your stock one to a machiene shop and have them lighten it up

 

good lookin out, man.

 

i havent had a chance to put mine on yet. good i saw this, keep us updated

 

I've never had a problem with lightweight or underdriven pulleys on my last 3 cars (Mitsubishi Eclipse Turbo, Dodge Neon, Nissan 300 ZX), so I doubt if I will have a problem with this one. Today motors are balance pretty good from the factory, so it dosen't make a difference. Everyone on the DSM boards was telling everyone not to use the pulleys because they didn't have a damper built in. I used the Mach V pulley on my turbo Eclipse and picked up 19 horses to the wheels on a dyno. As long as the the pulley isn't triggering the knock sensor, then you will have no problem. I have a logger in my XB, so I will be able to tell if the pulley is causing me problems. I'll take my chances :D :D . This is my motto If I blow it up, I'll put it back to stock and take it to the dealer because it's under warranty

 

Yeah it's a pretty simple install, you don't even have to take off the wheels of the car. Take off the 2 belts,take off the crank pulley bolt, and pull the pulley off. Install is just the opposite. Easy as hell because you don't need a pulley puller to get the crank pulley off :D

 

where do you get the idea that a harmonic balancer that has been lightened by a machinist is any better than an aftermarket part...?? that doesn't even get close to a comprehension of what a harmonic balancer does... you first need to go take a course in engineering called Kinematics... but before that you'll need Dynamics, because you'll at least need a handle on the physics behind the purpose of a harmonic balancer... then you can move on to machine design...

then you can come back and edit your post to let people know that you have absolutely no idea about engine parts...

physics/kinematics lesson... inertia is the force that keeps the engine in motion, mass is part of the equation... if you took away this "balancing" that is provided on one end by the flywheel and on the other end by the harmonic balancer/pulley you would get an engine that would shake to pieces - due to the nature that the engine is only firing one cylinder every 180 degrees, so we offset this to give the engine longevity... without it we'd lose oil pressure in literally months - instead of years because the vibration would first cause the bearing seats to deform or wear abnormally - thus causing the clearnces between crank and block to become irregular and over spec... so an engine designer will take into account all the aspect of this engine - crank couterweight design, compression, horsepower, environmental factors, etc... these are things that you can only guess about, they will not give up this info... now they take this info to determine the amount of inertia that the engine can use, more is better for vibration control, but more inertial resistance means a slow revving engine - so a balance must be determined... by shaving weight off the flywheel and/or harmonic balancer you will absolutely deviate from the expected life of the engine, but you will see a quicker revving engine, so downshifts and upshifts will occur quicker BUT you will be hard pressed to measure an acceleration difference... you will gain a benefit from a smaller pulley because all the accessories will be getting less power and the drivetrain will get that power instead...

YOU WANNA SAVE INERTIAL LOAD?? take those stupid 19" or 22" rims off your car that wasn't designed for that... get lighter rims, but KEEP THE SAME DIAMETER... use low profile tires and you will see a regearing that will absolutely make a difference in how much torque you are putting to the ground... torque is what you are after in a sports car, horsepower allows for higher top end speed, it is a measure of work - which has no time limits... torque is where the acceleration is... so how is torque measure... ft-lbs... that means a force applied over a distance - or more accurately at a distance... so let's talk numbers... let's say you have an engine that makes 100ft-lb, then you are in 1st gear and your total drive ratio for 1st gear is about 14:1... then drivetrain eats some power (which becomes heat), so after the reduction of speed to 1/14th of the speed you would expect 14 times the torque, but you will see maybe 11 times due to the losses... so we now have 1100ft-lbs of torque coming through the driveshaft... so to determine how much "force" or "power" you are putting to the ground you have to divide your available torque by the radius of your tire... most tires are like 28" tall - give or take, but we'll just say 24" because 1/2 of that (the radius) is 12"... 1 foot... so now we have 1100 lbs of force accelerating the car... ok... so let's look at a larger rim and tire combination... let's exagerate... go to 36"... half of that is 1.5 feet... so now we have to divide 1100 ft-lbs / 1.5 ft... so we get 733 lbs of "thrust"... so this is why your 4x4 truck is slower with the big wheels...

I'm rambling... but that is Capt Morgan talking... but the point is that this is information, not my opinion... I am backing what I say by the facts that have made me come to believe what I do... instead of just spewing useless opinions like so many in the message board realm do...


sorry for the flame, but I get so tired of people claiming to know something that they follow up with information that proves they don't...

 

Munch,

THANKS for the head's up, and for letting everyone on SL know about this also. I guess I'll hold on to my $$ for a little while longer.

 

"where do you get the idea that a harmonic balancer that has been lightened by a machinist is any better than an aftermarket part...??"

because they can balance it after its been lightened and it still retains the harmonic dampener

 

No problem man, looks like I just took one for the team

 

You should be able to get your $$$$ back. The part doesn't fit!

 

Yeah I know , I'm not too worried about that :D

 

the harmonic dampening isn't because the unit is balanced, it is because of it's mass... the more mass at a larger radius the better for dampening... the lighter the less useful it is...

 

Thanks Munch. Does make one wonder if they've even fit tested their shifter and fuel rail, etc.

I was thinking about the shifter, but now I'll wait till someone else gets one

 

You folks are harsh..maybe they sent you the wrong pulley?

 

Right on the box is a picture of the XB and in clear lettering it states:
"Crank Pulley for 2004 & newer Scion XB part # PTP-ENG-100"
So I don't think I'm being harsh at all. There is no excuses for this pulley not fitting at all.

 

Mike,

How are we being so harsh?

Munch ordered a part, took the time to install it and found out that it doesn't fit properly. Its just like any other part review here on SL. He didn't get it for free, he wasn't sponsored the part, he bought it, and is entitled to his opinion as is everyone else who posts a review.

I am always grateful to those who post honest reviews here. Its part of what SL is about. Helping others so everyone knows what works and what doesn't.