Putting a crank pulley on a Lathe, Good Idea???
 

Can i lathe off the ac/ps pulley off my crank pulley? No need for it and it would save some rotating mass.

http://i33.tinypic.com/f1ytkk.jpg

No. That's part of the harmonic balancer. Cut it off and the balancer will no longer work as designed. In short, it won't work at all. Just take it off and put an aluminum one if you want to reduce weight on the crank and break your OP gears.

Ok scratch that...

If you look closely at the pulley, the p/s portion can be cut off without touching the harmonic balancer what so ever, and poses no threat to your oil pump gears. It doesn't save much weight, but it is certainly cheaper than buying a new aluminum one, and doesn't shatter your oil pump gears. The 'nose' to the pulley that is left once you cut off the p/s portion can but faced off, however at that point you're cutting into the harmonic balancer. You're not completely removing the harmonic balancer, only some of it. I've taken off the p/s part , and I have seen someone on this board face off the 'nose'. I have no proof, good or bad, that shows any effects from taking half the harmonic balancer off.

Oh goodie! Conflicting statements... I love a good debate.
So curly your saying that the front pulley can affectively be cut off with out messing up the harmonic balancer because it is located closer to the crank and under the alt/WP pulley section?

Rebuttals?

I 100% disagree with curly. I stand by what I said. But hey, it's not my engine...

oh yeah, that sounds like a great idea.

You virgins should get together and go on a retreat.

If you all you got out of that was what you bolded, no disrespect, but your reading comprehension is a little laking. What you bolded only refers to when you try and face off the front of the pulley and doesn't apply to removing the p/s portion. If you remove the PS portion you are leaving the harmonic balncer untouched.

????

The entire assembly IS the harmonic balancer! The pulley is integrated into it. The unit is still the balancer though. If you cut on it, you're cutting on the harmonic balancer. Why is that so hard to understand? You do anything to it and you'll ruin it. Pretty simple. Drill holes in it to lighten it up, cut part of it off, turn it down, grind some of the rubber out, etc etc. Anything you do to it will ruin it.

Curly did contradict him self multiple times in his post. Can't blame hustler for making fun of him.

" If you look closely at the pulley, the p/s portion can be cut off without touching the harmonic balancer what so ever"

And then, "The 'nose' to the pulley that is left once you cut off the p/s portion can but faced off, however at that point you're cutting into the harmonic balancer."

So according to Curly, you can cut some of the part without cutting the balancer.

Yet then he says, "You're not completely removing the harmonic balancer, only some of it."

And finally, "I have no proof, good or bad, that shows any effects from taking half the harmonic balancer off. "

Twice he states you can cut off half the harmonic balancer without actually cutting on it, then twice he states you're cutting into the harmonic balancer.

ok ok, i won't do it. Thats why i asked. I would rather take a little guff and get the correct answer before trying it on my car and screwing something up.

ok. if thats how you want it to be, your choice. do you honestly think i cant bribe rick for your ip adress? everyone has a price. im on 2 grams of test a week and a gram of tren. do this a couple months back, ok i mightve let it slide, now, someone so much as looks at me the wrong way and theres gonna be probs, lucky for me they always back the fuck down so i dont gotta get my hands dirty. i know youll try the same when shit hits the fan but dont think ill be so linient, cause i wont. dont say i didnt warn you.

WTF are you talking about? I honestly have no idea what you just said. Oh and Texas is for steers and queers. :fawk:

The following is a rant with 4 apologies
 

I apologize (1)for not chiming in sooner, and for any misleading information.

The power steering portion of the pulley can indeed be parted off (meaning I used a parting tool, not a facing tool) without touching the harmonic balancer. Please looking closely at your pulley, before making any assumptions about the harmonic balancer.

I did say that the 'nose' can be faced off, which at that point would be cutting into the harmonic balancer. Let me be clear: taking the p/s portion off does not affect the harmonic balancer (see pic #1, apologies(2) for my oil leak). In this picture, you can also see the 'nose' of the pulley left over once you've removed the p/s portion. As you can see I was unsure what affect it would have if I faced it off, so I chose to leave it. In the picture, you will see a thin rust color ring on the inside, which is where the p/s portion was parted off (clean surface = rust, probably should have painted that) then there is a thin black rubber ring THIS IS THE HARMONIC BALANCER this rubber goes through the entire depth of the pulley, you can see it from the back. you can face off this nose, leaving enough meat left for the water pump belt groove. This, as I said, would cut into the harmonic balancer, however it is just a rubber ring, using the heavy hunk of metal that is the pulley to counteract any harmonic forces applied at the crank.

pic #1
Attachment 210558

pic #2 is a diagram drawn up quickly in paint, for the 3rd time, I apologize, this time for the sloppy drawing. I hope I labeled everything clearly. You can see that the part which holds the P/S belt is an L shaped piece which does not connect to the harmonic balancer.

pic #2
Attachment 210559

These final pictures, #3&4, are of an uncut pulley, and the same P/S section that I took off the pulley from picture #1. Hopefully this will give you guys an idea of what I'm talking about. This post was written in a slight rage from being called wrong, and as you all know, no one can resist arguing on the internet, so, my apologies(that's four)

pic #3
Attachment 210560

pic #4
Attachment 210561

Yeah, no hard feelings man.

For one, it's apparent 1.6 and 1.8 harmonic balancers are of different construction.

On a 1.8 (the one the OP has and the one he pictured), you can NOT cutoff any piece of the pulley as it is part of the harmonic balancer. If you disagree, fine.

If your 1.6 A/C / P/S pulley was attached to the "hub" of the front pulley assembly directly to the steel center part that bolts to the crank then cutting it off wouldn't matter. If it attached to the outer part that was suspended by rubber then yes, you cut part of the balancer off. I can't tell from the pics or your diagram.

Damn, all that time to write the post, and we more or less agree. I was hoping for more of a fight...

Anyways, all this information is kaput, cause I have no experience with 1.8's, and this information only applies to a 1.6 pulley!

believe me, I did the cutting myself, taking the p/s portion off doesn't affect the balancer. Of course it also doesn't remove a very large amount of weight.

If you want a fight, go open a thread in the engine forum on "compression ratios and forced induction" and read. Be sure to put on your flame suit and bring your ego if you forget your common sense.

haha, I'm really not much of a fighter. You only boiled my blood cause I knew you were dead wrong, too bad we were talking about different pulley designs.

at least it helps out the 1.6 guys, its cheap way to loose a little rotating mass, I should weigh it sometime

i cant spell, damn public schools fault!!
 

there was a guy on feoa.net i think he was running a set of festiva single V belt pullies. i have the V belt set up on my b6t in the festiva but i havent had a chance to see if it will also fit on the bp. i wanted to use a ATI balancer but i just dont have the room for the two pullies i dont know what to do....

unfortunately the B6T is a short nose 1.6L. An SNC crank pulley does not fit on an LNC 1.6L. However an LNC 1.6L Crank pulley does fit on the 94+ 1.8L BP. So close but no cigar. If the B6T was an LNC then we may have almost stumbled upon an oem PS/AC elimination pulley.

Also with that being said. I do have a 1.6L LNC crank pulley that I may modify if it is agreed that will not mess up the Harmonic balancer. All i would have to do then is run a VBelt pulley for the W/P and ALT. which i have as well. I wasn't really looking for a huge weight saving. It was more that i hated looking down in the engine bay and seeing the crank pulley with a missing belt. The weight saving aspect is a definite plus though...

yup its agreed, no damage to the harmonic balancer if you don't touch the rubber, and a little less than a 1/2lb of weight savings, whoopie.