now...hypothetically....what would happen if you got neutral balance shafts and a lightweight crank oulley. those are both of the vibration dampers.....would the vibes be horrible?

 

You would feel more vibrations without the balance shafts...don't take my word for it...it states that in the build book.

I didn't write the wording but I believe it's:
Stock - original harmonic balancer
OEM - MRZ original harm bal size
UDP - MRZ undersize Pulley

 

so there really is no gain with this??????

 

Jn2 thanks for going through this!

In truth the difference is very small -- and the dyno runs are so close that I'd bet money that if you had simply done 3 pulls without changing anything and waiting for 10-30 minutes between pulls you would see very close graphs similar to those pictured. The pulley slows the alternator and the AC compressor and reduces spinning mass weight so it will provide SOME increase in power. I would venture to say that it could shave a tenth or two on the dragstrip -- at the most. It is another item to put on your wish-list...all the items (exhaust, intake, header, etc) add up when put together.

 

i made a how to idk wtf is taking it so long to get approved, i included videos on that one too, videos of pulley on idle, engne on idle, cluster on idle, and cluster idling+turning a/c on

 

180 buck plus shipping for like 3 more HP??? nope not for me

 

its all pieces to the puzzle. i want to get all the pullies they make and quick rev like a ****

 

this is not a a hp mod, its a supporting mod, what ur not going to buy solid mounts b/c they dont add hp either?

exactly

 

EXACTLY


and theres the pic i was talking about...notice how it says "OEM lightweight"..

 

i was the first to get a TTR auto engine mount,but 180+ for a pulley, **** i paid 200 for 2 pulleys with a belt for my blazer. maybe if they do a group buy and the prize is right

 

blazer parts are to common, truck is old, i would expect you paid that much

 

i know there would be vibrations...im wondering about damage to the engine. I know bad vibrations can be bad for engines, and deleting balance shafts and a lightweight crank pulley is effectively removing the two parts of our motor that cancel out vibrations.

 

It can be very bad.

 

200 miles on mine so far...

 

someone explained this to me in another thread.... ill find it after work

 

not all engines come with balance shafts..its not a "nessecity" ..as far as vibrations yes they will increase..the shafts help everything stay smooth so that the engine will be more popular with the buying public...some former engines have lost popularity and were discontinued simply cus they were too loud, or made vibrations.

 

About 175 on mine and so far no problems.

 

Tell me when you guys put 1000 on, then I'll probably buy them.

 

hell id buy them now if i had the money

 

Lets get the how to approved...

 

Same here, and if I knew it would work on a SC'd 2.4 cause I plan to get SC'd in teh spring.

 

It will work on a S/C cobalt for sure. They produced one for the LSJ, the only difference is the amount of ribs on our pulleys is different between the cars. 2.2 and 2.4 is the same, 2.0 has another rib.

 

thats the problem he said, he plans on s/c his 2.4

 

you do not want an under drive pulley with a super charger you will lose boost by spinning the blower slower

 

FOr a supercharged application I would just go with the lightweight OEM size pulley from MRZ.