Steveo47

iTrader: (8)

I ordered red, but i got grey. Whatever noone sees them anyways. They feel super light, gonna have to feel it right beside the oem crank pulley. Going to attempt instal this sunday. Any last minute tips?

Oh and they gave me a small bag of M&M's lol

_ant_

iTrader: (4)

very cool man. sorry for the newb question but what do these do, give faster revs?

Steveo47

iTrader: (8)

They reduce unsprung weight, basically freeing up power your car already has, it doesnt give more like a intake would. People on the 370z forums say they get a bit better gas milage, quick revs, and dyno about 10hp. So not bad for ~250 bucks

Fezzik

iTrader: (6)

you need to put that on a scale and take a pic
then put the OEM on a scale and take a pic for comparison. not too many people have done this mod and that would be a good comparison. Be sure to use the same scale.

Steveo47

iTrader: (8)

^^ sure ill give it a shot. Likley installing sunday, ill keep everyone posted.

Black Betty

iTrader: (60)

You're installing these yourself? Good luck.

tWistedMissiOn

Will this benefit the G? Because i thought i read somewhere on the forum before about pulleys, and some thread said that this is not very compatible with the G and that it will not benefit the G or something like that. Anyone who remember that thread, can someone confirm this? you remember BB?

Black Betty

iTrader: (60)

Lots of folks have stated their OPONION that this mod won't really help. Unless they've tried it, all it is is an opinion. I personally don't know how much benefit it will give. Probably only a little like most bolt on mods for this car, but it would be great to hear from someone who actually has them. I've had a set sitting in my garage for some time now. I got them as a prize and never got around to installing them.

CaptainObvious

Not true:
"unsprung" weight are things not adding weight to the suspension springs on your car like brakes, wheels, calipers, tires, axles etc... rather than supported by the suspension which includes everything else.
Hopefully this makes sense to you.

Steveo47

iTrader: (8)

^^ my bad, i think i ment rotational, it has a similar effect to getting light weight rims correct?

tWistedMissiOn

Thanks for chiming in man. And lol, you have so many awesome stuff sitting in your garage man! you should install all of those and your rides gonna be sick! And yea, i guess its best to hear from someone who has installed them. So do it OP! and let us know how great this mod really is, i'm real curious about this too.

Steveo47

iTrader: (8)

OKAY UPDATE. I went for the install today. Just so everyone knows i didnt finish the install.

Now, you think the hardest part would be taking off the stock crank bolt? nope that was the easiest. I did the method everyone used with the G35, put a torque wrench on the ground, and crank the engine a few times, came loose on my second try. I had my friend start the car and i would pull the battery before the engine turned over.

Now i got the pulley off, took all of 15 minutes (including splash shield removal). the problem was the NST pulley didnt even fit! WTF? i read about some of the 370 guys doing a bit of sanding to make it fit, well **** i sanded it for 3 hours, and i could get it in 3/4 of the way, and that was it. Here is what i think the problem is:



The oem has that dip in the silver part, where is slopes in towards the crank, where the nst doesnt. I could only get the NST silver collar in 3/4 of the way, i tried sanding the collar a bit, i almost sanded all the anonizing on the inside of the pulley away, it just wouldnt sit all the way down. Any advice?

tWistedMissiOn

Wow, didn't think it would be that hard to install... no wonder nobody did that. Maybe you can take the pully to somewhere you can get the silver part to be sanded to slope like the OEM. Is that the only thing though? Good luck with the install man.

edit: After looking at it for a second time, it seems like the neck (black part below the silver part) seems to be higher than OEM too man. You might have to custom it to fit, and not just sand the silver part i think.

Legz

iTrader: (1)

Have the stillen under drive pulley, fits perfectly, something for you to consider.

dfw0837

No, wheels would be unsprung weight, I don't think a lighter wheel would show any increase in power, but possibly could effect acceleration?

A lighter pulley or flywheel would be less rotational mass. The idea is your engine doesn't work as hard to spin it's rotating assembly. You can also use lightened rods, pistons etc. Typically you'd want this in an engine that makes it's power at high rpms - so you can get into that rpm range more quickly. A side effect can also be a few extra ponies.