MRZ Billet Crank Pulleys for the NA ECOTEC's 2.2 and 2.4 are ready! LE5 L61

We are proud to bring you another high quality performance product for the Ecotec

Link to MRZ Performance Underdrive Crank Pulley - UDP : http://mrzperformance.vstore.ca/prod...roducts_id/144

OEM WEIGHT: 1650 Grams OEM DIAMETER: 6.500"

MRZ WEIGHT : 590 Grams MRZ UDP DIAMETER 5.875"

3 X lighter than OEM ! Now that's a radical drop on the rotational mass of your crankshaft meaning your engine will get to revs faster.




MRZ billet aluminum UDP versus OEM cast iron pulley:



Link to MRZ Performance OEM size Lightweight Crank Pulley: http://mrzperformance.vstore.ca/prod...roducts_id/143

OEM WEIGHT: 1650 Grams

MRZ WEIGHT : 700 Grams

2.5 lighter than OEM !



Satisfaction guaranteed like on all MRZ Performance products!

Just contact me if you have any questions Thanks for looking!

 

I was just wondering if you guys have dyno'd these to find the results?

 

Excellent!

When will you be coming out with an alternator pulley to go with it?

I can't buy this right now, but this is definately on my list.

 

interesting... now do they actually make a difference

 

no now but if someone is interested in testing we can help

Alternator pulley are soon to follow

They do we'll get dyno # to proove it

 

im gonna be supercharged soon i have a 2.4...will this work when im boosted or just for n/a cars only?

 

This is why we have the OEM size pulley, it is the same size as the LSJ pulley but with 5 ribs for those who run superchargers

I would not recommend goind with the samller version if you want to upgrade your powertrain with a SC

 

so these are the same size as the OEM pulleys? and i would b interested in doin a dyno.

 

so whats the deal with the whole harmonic balancer issue? no one has ever been able to provide a solid answer on this.

 

what will this really do for the 2.2/2.4 motor...quite curious

 

Does the same idea apply for a turboed 2.2?

 

I will buy them when they become a set. How bout AC Compressor pully? If so you have a 100% buy from me.
Could you shed more light, what "issue" are you refering to?


Edit, I want the underdrive set: http://mrzperformance.vstore.ca/prod...roducts_id/144
What size belt do you recomend with them?

 

The stock pulley's are harmonically balanced. The rotation of the crankshaft creates vibrations and if the aftermarket pulley isnt balanced the same, then there will be added stress on the engine causing problems later on.

 

Ahh, true, I understand why he called it an issue but his question threw me off.

 

Damn those look sexy....

 

How much of a difference would there be between in power would there be between the stock sized one and the underdrive one? Also how much would the underdrive one affect electrical stuff like lights and stereo and stuff? And finally does the underdrive pulley come with a smaller belt or do you have to get that seperately? No matter what i will be ordering one of these soon just gotta figure out which one.

 

Same here
I would want to do both the crank and Alt at the same time I don't really want to take it apart twice.
Tell us when the ALT's are ready will ya

 

sent u a PM, i am interested in it, id be more than glad to test it out for you, i have a local dyno i go to all the time, they all all my dynos in their system, so i can show before and after's...

 

i will be testing both the underdrive and the lightweight version of these,
MRZ is sending me both to test out, and you can bet ima let you guys know how each one performs, expect to see pics, vid, and dyno sheets

 

I still want to know if it affects the electrical components. stereo, lights. etc. Im not putting a sound system in my car, so i wont have to worry about that.

Let us know, do a voltage test, before and after. and let us know if a new belt is needed.

 

No... Supercharged must stay as OEm diameter to avoid going smaller to keep the same boost level. You can put the UDP on a turbo and get great gains

 

Sweet...now I know which one i'll be getting.

 

hmm, i dont have audio, well not alot, i have a kenwood deck with kenwood door speakers, i could run the underdrive for a day or so to see how it affects lights and stereo,

 

If you choose the Lightweight version, there is absolutely no problem eiter if you have big stereo or stock

If you choose the UDP version:

- If you car is stock on the electrical side or have a small sound system installed, there will be no problems with the UDP

- If you have big sound system or other things that takes a lot of power you might experience a power drop...

anwsers in bold characters

 

i changed my sig, fully functional ur side links to ur site, TTr links to TTR