SOOO, Back to the point of this thread..... When can I buy one???


Thank god!

 

ive seen hondas with lightweight pulleys on for... 4 years now? and no problems... im referring to the 06 si with the nst pulley kit. maybe its just with cobalts?

u ppl crack me up.

 

the forums are full of debates today. anyone look at the BNR thread?!?!? holy cow! some serious thrashing going on there.

 

Hey Gdubs. Don't put it on if you're just doing it out of spite. I know it's your car and your decision but is the SMALL gain worth the possible problems plus the cost of the part/install?

You will be one of the guinea pigs for the product, thank you and hook us up with feedback eh!

 

As long as the pulley is 100% balanced but if not then MP better balance them

 

I also want proof this is a 100% balanced pulley no questions ask and no if ands or buts. If i get one i will be running it on a harmonic balancer and it better be balanced or im gonna return it thats my issue. I built ecotecs all day for gm so i know whats gonna kill these motors. and not a pulley inless its no balanced then ur gonna take out the seal and the main bearings. in not woried about a seal i can change it in 2 mins and they only cost me 5 bucks from gm

 

basically same thing on a diff car

NST Pulley *Long term Users* - 8th Generation Honda Civic Forum

 

Trust me..it's NOT balanced....but you prolly can have that done at a machine shop?

Take a close look at this pic:
See those two *holes* drilled on the inner ring? That's where material was removed for balance.
I think that *00* painted on there verifies the balance.

Now this is just my take...someone can correct me if I'm wrong

 

Some additional reads:
We're talking DAMPENING HERE...NOT BALANCE.

From EVO forum:

http://forums.evolutionm.net/7837770-post4.html

I recall one dedicated racer in here who resolved all his rapid bearing wear issues simply by going from a solid aluminum pulley back to a dampener. That was convincing enough.

Grab onto a steel pipe and have someone hit it repeatedly with a ball peen hammer. Those ringing vibrations that make your hand hurt get transmitted to critical friction surfaces. That rubber ring absorbs those vibrations as they reach the nose of the crank. A Fluidampr is even more efficient. In fact, there was an article in a magazine not long ago whereby it was demonstrated that both the ATI and Fluidampr increased power as compared to a solid pulley on a V8 engine.

Crank driven oil pumps tend to suffer premature failure when the crank is undampened. This isn't a problem with a 4G63, but it demonstrates what crank harmonics can do.

In summary, there isn't any way I'd run a high torque engine without a dampened crank. There's nothing to be gained from it, only something to be lost

CRANKSHAFT TORSION AND DAMPERS:
Torsion - The hidden problem with the crank system – and why it needs a damper.

http://www.bhjdynamics.com/downloads...amper_Info.pdf

 

Finally people that understand what I was trying to get across.....thank you!
Im not at all trying to be a dick in any way. Just trying to warn people of the harmful effects of an undampned/unbalanced crank pulley can do. In no way am I an ecotec engineer but I kno quite a bit about this engine.

 

For the scientific minded... Mechanical resonance - Wikipedia, the free encyclopedia
Will the pulley cause the engine to go wack... probably not but it does increase the chance to do it.

 

just wanna put out there, theres a chance your engine will go out of wack with a tune as well. probably more so than a pulley.

MPX, im sure ppl would chill more if you made a pulley with a dampner in it..

 

Dart I agree with u...but the costs are insane that's why the ati super dampner is 400+ dollars ya kno?
This would be a great piece to buy and install on track days tho. I wouldn't personally run it on a daily basis.

 

I had a lightwieght/underdrive pulley on my 03 cavalier for 4 years and over 60k miles and never had a problem with the engine. This was my dd. Mind u i raced the car everywhere i went.

 

$400 for a pulley?? it better make some seriousl gains or be phenominal. maybe even give me a blow job too. lol

but damn, thats crazy. id love to get the mpx pulley for the throttle response, the ss/tc seems to really need more IMO. guess ill see what happens. idk if im getting one or not

 

And I wasn't trying to be a dick either. I just get tired of people posting things on this forum claiming they know what they are talking about based on what they have read or what people have told them. In the 10+ years that I have been modifying cars, I have never seen or heard of an actual car that was damaged by running a lightened pulley, balanced or not. Including the pulleys that I had run on 2 of my previous cars. One of them being an MPx pulley.

While I understand all of the theories and they seem to point to the pulley causing damage, the fact of the matter is, they do not. I again, base this on my personal experience, not from what I have read or been told.

 

I had a 3 light weight pulleys on my 01 Hyundai Tibby, I didnt see any damage to the motor... I had them on for +40k miles and 3 years.

 

I ran the rsm pulleys on my 99 grand am 2.4 and it messed up the seal with prolonged use..just saying there is a risk involved with this mod is all. I kno honda guys running pulleys like these without any problems..and other platforms as well. But for some reason the ecotec does not like aftermarket pulleys

 

Do you know of other Ecotecs that had the problem? Anyway..that's the point here...
just because it worked well on other cars like Hondas, doesn't mean it's going to be problem free with this engine.

 

Actually 3 and you are right

 

wow...

I've seen some weird stuff on CSS, but this one takes the cake.

I will admit that in the past I didn't understand that GM changed from a crank mounted balancer, to a dampener;
but considering some of the mods that people here do, I am floored by the static that MPx is getting for an item that most FWD enthusiasts typically trip over themselves to buy...

...

I actually was going to come purely to ask one question to MPx (something recently touched upon);

Question:
Is this item in finished form zero balanced?

(I already have some MPx parts I plan on buying - after paying off the credit card again, at which time my brother will add some parts to my order for his '09 SRT4;
so I'm not just wasting your time.)



Now, back to the jist of what I started pseudo ranting about;
Ideally there would be a rubber isolator on this to remove any torsional stresses from the accessory belt to the crank snout, and any item like this will not yield a single HP, but rather allow the engine to change RPM's faster - much like a lightweight flywheel, or using the GMPP's neutral balance shaft's...

IMHO, if this is zero balenced, that's a serious "plus" for the part...

FYI: I run a Centerforce dual friction as well as a Fidanza lightweight flywheel on my Grand Am, both parts I was advised against running...

 

sooo, anyone actually buy this and test it out? im decideing if i want it or not. ill probably spend about 12 hours doing research as to if itl damage the engine tomarrow.

 

I dunno...

frankly I thought my question would be answered.

???

 

I think the ecotec motor could SERIOUSLY benefit from a fluiddampr style pulley ISOLATOR.

 

GM tested lightwieght crank pullies on the Ecotec; they tore up the timing chain and gears in their tests. Folks are free to do and buy what they want, but no 100,000 mile durability tests have succeeded with these parts. GM 100,000 mile engine durability tests dont mean sticking the parts on a car and driving around for a bit. They do engine dyno stand tests 24 hours a day for weeks. Its an amazing duty cycle. Its just one more reason why the Ecotec is such a great motor; its a shame how many enthusiasts can do nothing more to the motor than screw it up with their mods and tunes...

GM stage 1 on the LNF passed 100,000 mile durability tests, of course, they did not have a liteweight crank pulley. Its clear that prospective purchasers should be made aware of the potential pitfalls, and please listen to folks like Blazin' who are stating the facts.