Has any one used this product on evolution 9 mr.

How did you like it?

Any negatives?

 

I personally woudn't put a lightened crank pulley on the 4g63, especially if removes the harmonic balancer. I have seen where its ok on a Subaru engine, but you may reconsider the power gains over the longevity of your motor.

 

Oh no not this debate again!

The 4g63 uses a harmonic dampener, not a balancer. Just because a case has not been seen on a stock 4G63 block where a non-dampened crank pulley has caused a problem does not mean that it can't. On built 4G63's it is very important to use a dampened pulley as the tolerances are closer and the harmonics need someplace to go.

I have ran solid crank pullies on both of my EVO's, my DSM, and I have not had any trouble. Sure there may be better ways to make power although until I see a case proven where a solid undampened pulley wrecks havoc on an engine I would say your are safe to use!

 

go with a fluidampr or an ati..

 

sorry I meant dampner.. i don't see the Perrin as being a dampened pulley as that is where the weight savings comes from. I have used them myself, yes seen power gains, however on a street car where you want your motor to last I wouldn't use it. The real test is using it high mileage... how long do you think your bearings will last when you have that on for 50k or more? I'm not willing to try it out.

 

Ive got 147k on my vr4 still on the stock engine (no rebuilds) and my solid/lightened crank pulley is fine. However the fact that a dampened pulley will absorb vibrations in the crankshaft is not in question, there is no argument that if you are not absorbing this energy into the pulley it has to go somewhere (likely bearings). Knowing this I think you need decide if you think that this added strain will end your engine or not. Its my personal opinion that it will not do significant damage in any real amount of time. you still have to remember that the amount of energy displaced on the bearings is going to be proportional to the balance of your rotating assembly, just something to keep in mind aswell. But yes a dampened pulley is superior, its just questionable wheather or not that is needed. IMHO


oh yeah, and usually the weight savings comes from material selection not wheather or not there is a dampener present. Aluminum is far lighter than cast iron last time I checked (in referance to a TEL 4G63 motors pulley)

 

The main issue aside from engine durability is the knock sensor which will pick up additional sounds with the removal of the stock crank dampner

To me it is not a place I would look to find power

 

The stock pulley is light at 4lbs or so although a typical undampened/solid/undersized pulley can be 1/2lb. This is a huge difference to engine RPM, like adding a lighter flywheel a solid alum pulley can have decent gains.

The knock sensor is located closest to the cylinder 4/transaxle. The affects of knock should be much less in this case as you have noted. I contacted Turbotrix and they had no problems flashing with a solid crank pulley. Every tuner has their main aspects of tuning, if knock is your goal to reduce then I would like to see documentation that proves a solid pulley gives more knock. Al - I have asked this from you for at least 2 years now. Please prove it.

 

well how about this? i been looking for accessory pulleys for the evo and havent found any i take they dont make them?

 

Little to no gains for these. Plus the major PITA to install would keep many away.

 

what ya mean by PITA ?

 

pain-in-the-a$$, not fun, too much work for too little gain...

 

ahhh that makes sence was only wondering cause they did great gains in my s15 silvia