Fug! I'm so PO'd. I've been tackling a fuel leak issue for months. FINALLY fixed it officially today and run into a major problem. I've got video of it but unfortunately it's 130mb and youtube only allows 100mb. So unless someone can tell me how to shrink I'll go make another quick vid even though I'd hate to....here's why.

ATI hub is what I have along w/ the 12" rib crank pulley 7.65/spacer. Blower pulley is 3.85. The problem is looking down at the crank pulley it's clearly visible my ATI is wobbling or it's the the pulley attached to the hub making it wobble or it's the 7.65 pulley itself. I can't tell. Belt alignment is perfect so it's not that kinda wobble it's more like a east-west w/ 1/8" of travel.

The car isn't vibrating all weird either as I'm running solid motor mounts. Car doesn't feel weird inside either sitting in the seat. Blipping the throttle the wobble gets more intense. The tensioner bobs up and down in this process even more. The mech oil pressure gauge isn't fluctuating either so it doesn't appear to be beating the snot out of my bearings as I have a solid 60psi @ idle...but it sure looks like it's beating my bearings.

There was only one way to put that pulley onto the hub as I had to tap the holes larger to get the bolts in and it clearly would only go one way as it had a slotted hole. I hope I didn't install that wrong and it is the problem. I had to make this long to be as descriptive as possible.

Anyone else have this problem? Gonna have to lift it up and take a look at it further to see if any of the 3 studs backed out off the hub.

Thanks for any info!

 

Hopefully you can see what I'm talking about. After closer examination it appears I didn't center the spacer connecting the hub. I don't remember it wobbling like this before and I visual looked at that area to make sure the belt was aligned while running etc. I may have messed up a perfectly brand new ATI hub as I had to tap those holes larger to get the spacer/crank pulley studs to get in. Now I'm feeling really stoooooopid. Never noticed it til now. On the hub there is a sticker that says off key hole. The crank blower pulley is slotted and if I'm not mistaken is supposed to go in that hole? I cleary don't have bolt going through that hole.
2 o'clock positon that's the sticker saying off key hole here. See those 3 different color holes. Yep that's where I tapped. http://fbodyeurope.org/Gallery/main....serialNumber=4
Will it make that much of a difference? Only thing good is I'll have to find 3 bolts w/ that same thread pitch to fill in those holes I tapped as they are larger.

How could I over look that?! I installed all this stuff outside the car before dropping it in. I feel sick.
http://youtube.com/93SRZ

 

the bolt hole that is marked on the ATI balancer lines up with the dot-marked hole on the ATI crank hub. not the blower pulley. i believe there is an elongated hole on the blower pulley that may only bolt up one way to the remaining 3 holes in the balancer. you did not need to retap the threads though. i picked up some grade 8 bolts from the hardware store to bolt up the pulley. who did you get to cut down the spacer? maybe it is not machined down evenly and causing the wobble.

 

I know the blower pulley I have did come slotted and it appeared to only go on one way using the 3 remaining open holes. I had to tap the threads as the supplied bolts that came w/ my kit were larger. Exotic Performance Plus is where I picked up the F1 setup. Couldn't find any locally (stationed in Germany still) so I used what came. As far as the spacer not being machined properly that's possible. But after looking underneathe the car again last night the spacer is not center on the hub. I know it was before but it has since shifted--if that's even possible as the bolts going through that spacer have almost zero wiggle room. I'll try and get a pick later today of it.

Thanks for the response.

Silas

 

The 7.65 procharger pulley is centered by the spacer. So I would check for issues with the spacer not seating correctly not the bolts. Also make sure there are no burrs on the face of the superdamper and all the bolts are flush. Even if you get everything perfect the tensioner will still bob up and down from the cam lope.

Edit: I just looked at your video and it looks the whole motor is moving east west. Its hard to tell in the video though.

 

Crap dude, that sucks! Something is definatly out of alignment. Its just figuring out what it is, and getting it fixed before it messes up anything else.

 

All the bolts are flused and no burs. I haven't taken the pulley of just yet but I looked at the back of the hub and they're secure. If you look in this pic the spacer is off ever so slightly to the left and this is the motion you see in the vid. I have a better vid but's a 130mb and I don't know how to compress it. I got response back from Jake @ EPP and he said the following--I definitely don't want to restart it after hearing that to make another vid. The engine was built last yr and broke in for me logged about 30 hrs on it and dyno'd prior to shipping so I'm kind of skeptical on the hub being loose etc. but I'm not ruling it out. I haven't even driven the car since the engine shipped last yr putting it back together in summer 06' and working out all the bug this past summer.

Here's the pic.

And you are right CALL911 I definitely want this fixed. So damn close but yet so far.

 

I would pull the blower belt off and run it so you can figure it out.

 

Yep I think that's the best solution at this point. Any idea how it will run w/ out the assistance of the blower and all that piping? Good thing about the FAST is I've got plenty of different tunes.

 

I pull off the blower belt for long highway trips and put my old stock ram air box and MAF on the throttle body. I don't change the tune and it runs just fine. Gets better gas mileage without all that blower drag on it.

 

Cool, I'll report what I find later this wk. Thanks guys.

 

yep had the same problem with my crank pulley, it takes trickery to line up that thing so its centered. Make Sure both mating serfaces are clean, tigthen the 3 bolts a few threads at a time, for example in clockwise direction, 3-5 turns on one, then to the next, that seemed to do the trick for me since my belt was so tight with tensioner all the way loose, there was no way to get the belt off without removing the crank blower pulley.

 

Are you serious?! I was just downstairs trying to get that damn thing off! It was tough getting it on but not that tough. I started to back the bolts off and I started seeing the spacer move as well and I remember how hard it was getting the spacer on evenly...well at least I thought evenly. Thanks for tip!

Oh here's the original vid. I didn't know CZ had a 500mb limit. Took forever to load though sheesh.......
http://videos.camaroz28.com/video/0c...b400eef251.htm

 

i cannot tell for sure but it looks like the balancer and all is wobbling. you might want to take it all apart and reinstall just the balancer on the hub and run it. maybe it is not seated right.

 

Found the problem.

The 3 holes I tapped one hole doesn't have the same spacing difference as the other 2 so in theory I'd suppose 2 are off ever so slightly causing the wobble effect on the crank pulley. Now my question is WILL this damage the crank if I elect to put it back on? So what do I do? Buy another ATI hub or try and take it to a machine shop and have the holes tapped even larger and properly spaced? I guess I kinda know the answer to this.

It's a confined space so it's hard to tell but the hole up top is the one that's not spaced correctly. The top hole is the 2nd pic.