Difference in crank pulleys?

[blcknspo0ln]

Any difference in a 6 bolt and 7 bolt one? I'm using a 7bolt crank pulley in my 6 bolt motor.. Do you think that will cause any issues?

[puremx69]

Techincally they both suck if your motor is at all different from stock, and on the same token, are both awesome for the stock applications. I bought into the whole dynamic dampening thing and got myself a Fluidampr, not just because of the dynamic dampening, but also because I've heard horror stories of the stockers rotting out and separating (they're attached by the [tuned] rubber dampener). As for your ? I'm not exactly sure - check the p/n.

[Nate Crisman]

I ran a stock dampner for all my passes, Iv never used anything else. Take that for what it's worth. :?:

[T_K]

the thing is is there a difference betw. 6 and 7 bolt pulleys. I have a brand new 7-bolt one which I'd like to use in my new motor.

[atc250r]

I've used both on both types of motors. My CAPS is down right now so I can't look it up and check the part number for you.

John

[91tsiguy]

There's at least 3 different part numbers for these crank pulleys: 1g 6 bolt, 1g 7 bolt, 2g 7 bolt...from what I remember. Timing marks are the same on all, but I believe they are different in their weights or counter balancing with the hole drillings in them. I may be off on this though.

[atc250r]

There may be differences but they aren't counterweighted AFAIK. I always thought the drill holes were to balance it.

John

[91tsiguy]

Eh, I don't have a clue on this one. Never really looked into it enough.

[atc250r]

Me neither. I'm one of those animals that runs a solid aluminum underdrive pulley on mine.

John

[Black99X]

I too had this same question because I have an unorthadox and I used to go through a belt in 2 weeks when the car was on the road! I'm just going to order a stock 6 bolt pulley-- I think there is something wrong with the unorthadox and thats why I have belt problems

[atc250r]

Make sure you have the WP pulley on the right way. It looks pretty "right" either way and I made that mistake after doing a warranty short block on a customer's car years ago. It took 2 belts before I figured out WTF was wrong. Its not off a lot but just enough to chew the belt up.

John