: who makes a keyed crank pulley for us?



runsfromdacops
01-26-13, 04:45 PM
hey guy my stock crank pulley has come lose 5 times now so i think its time to upgrade to a under driven and keyed one.i have a aftermarket crank with a key way in it.
who makes them for our cars?
best place to get one?

FuzzyLogic
01-26-13, 06:47 PM
Don't underdrive.

http://www.summitracing.com/parts/ATI-917266/

http://www.atiracing.com/products/dampers/damperparts/index_ls1_pin.htm

runsfromdacops
01-26-13, 07:06 PM
I have a keyed crank.I dont want to drill the crank.

Id like to underd drive it to slow the power steering down some. Its vary scary @140mph and I think slowing it down will help

FuzzyLogic
01-26-13, 07:23 PM
I have a keyed crank.I dont want to drill the crank.

Id like to underd drive it to slow the power steering down some. Its vary scary @140mph and I think slowing it down will help

If you have a keyed crank, then why are we having this conversation? You'd have to break the key to slip the pulley.

We have super slow power steering relative to cars that are much faster than ours (e.g. Corvette). It's your alignment, not your power steering.

You're making zero sense right now.

runsfromdacops
01-26-13, 08:02 PM
Read the post...

My cank has a keyway. The stock damper dosnt.I know our cars use a rather short serpentine drive compared to the f dofy or others.

I was pretty sure that our cars used a smaller powersteering pulley then any of the other cars (thus sping it faster)

HAMSTAR
01-26-13, 08:51 PM
If you're driving at those speeds, then you are probably spinning it pretty fast, which means you should get an ATI Super Damper. ATI sells a key kit for their damper. Not sure of the details, as I didn't key mine.

By the way, though I didn't go with an underdrive for the same reasons as Fuzzy, my tuner swears by them. I think you can safely do a 10%. More than that if you're feeling daring.

FuzzyLogic
01-26-13, 09:38 PM
Read the post...

My cank has a keyway. The stock damper dosnt.I know our cars use a rather short serpentine drive compared to the f dofy or others.

I was pretty sure that our cars used a smaller powersteering pulley then any of the other cars (thus sping it faster)

You have an inverse keyway? You're probably screwed.

PISNUOFF
01-26-13, 10:37 PM
I have an SLP 25% underdrive pulley and haven't had an issue in three years. I went through three stock pulleys in two years before I switched. It is keyed.

runsfromdacops
01-26-13, 10:40 PM
Im not sure what you mean. Its a compstar crank. It has the Comneon square keyway that youd expect to see on a crank. I just need a pulley that has a key way cut in it

darkman
01-26-13, 10:50 PM
Im not sure what you mean. Its a compstar crank. It has the Comneon square keyway that youd expect to see on a crank. I just need a pulley that has a key way cut in it

According to their catalog, the ATI standard replacements part numbers 917266 (aluminum); 917246 (steel) as well as their 10% underdrive part number 917278 (aluminum) use their hub number 916032 which reportedly comes with a 3/16" keyway. In any event, the hub is a separate part that I believe any machine shop could add a keyway to if required. ATI has excellent reputation for customer service so I would not hestiate to call them directly to verify this. (They do not appear to offer a 25% underdrive, but you could ask.)

DMM
01-26-13, 11:47 PM
You can have any balancer machined, although if the balancer is coming loose it's likely installed incorrectly. There is nothing wrong with pinning the crank...however pinning or the key won't help keep the thing on there if its not properly installed.

PISNUOFF
01-26-13, 11:59 PM
Yours is spinning loose because of TOO MUCH POWA. The faster acceleration spins the pulley on the snout, that's why they get pinned or a key is used. Darkman is right, it's a 3/16" keyway that is the standard size.

runsfromdacops
01-27-13, 12:02 AM
Its not hard to install..look at my build, I think I can handel putting the pulley on. its just a shity design. If it was a stock crank id just drill and pin the stock balancer but i dont feel right doing that to a crank with a keyway in it. I know ati makes one with a keyway for our cars buf I figured there would be more options.

DMM
01-27-13, 12:39 PM
Its not hard to install..look at my build, I think I can handel putting the pulley on. its just a shity design. If it was a stock crank id just drill and pin the stock balancer but i dont feel right doing that to a crank with a keyway in it. I know ati makes one with a keyway for our cars buf I figured there would be more options.

My apologies, did not intend to impugn your work by any means. Many have had the balancer come loose as GM didn't exactly do the best job. Never heard of one coming loose unless incorrectly installed or spinning on the crank other than using a supercharger. There are threads out there where some have had issues with the balancer coming loose after having it pinned due to improper installation though.

PISNUOFF
01-27-13, 03:36 PM
1050 crank Hp might have something to do with it.

runsfromdacops
01-28-13, 03:01 AM
yeah shes making some power haha.
looks like powerbond makes a keyed pulley for corvettes (same as our cas) you can get it in 25%under and stock
im going do to my machine shop in the morning to see if he can cut a key way in my stock pulley as it should have been from GM

Mn800r
01-28-13, 11:25 PM
I have a power bond on mine, I picked my caddy up this past summer(July) built by modern muscle in Chicago. Maybe give them a shout? Just checked the build sheet for a part#...just a description, damn it.

FuzzyLogic
01-28-13, 11:44 PM
If you're going to spend the money on a pulley, why don't you get something that prevents crankshaft harmonics from destroying your engine?

PISNUOFF
01-29-13, 09:29 AM
Maybe fuzzy should charge to spec out everyone's build. Lol

runsfromdacops
01-29-13, 10:35 AM
My crank id still in one pice from useing the pos stock pulley and making 1050chp
I have heard good things about both powrr bond and ati. The ati just isnt in the budget as its almost 3times the cost of the power bond.
If the motor starts shiting barings ill buck up and get a ati down the road but suspect the powerbond will be just fine

FoD
01-29-13, 11:13 AM
Part number for stock Powerbond balancer? Link maybe? All I can find is the 25% UD.

runsfromdacops
01-29-13, 12:50 PM
they make all 3 styles for corvette(same as our cars) stock/10%/25% im leaning more towards the 10% as i still have a stock radiator and dont want to risk the car over heating

FoD
01-29-13, 12:52 PM
Okay. Where are you finding the 10% and stock sized ones? I have found 20 retailers, and all only carry the 25%.

runsfromdacops
01-29-13, 02:54 PM
im working on part #s right now. ill get back to you when i hear back from the company