woah bump from the dead.

sorry i cannot answer your questions though, maybe someone else can help

 

Yes ... From the very dead

Sounds curious to me that none have investigated this obviously important point to that topic...

 

Anytime you have a surface in contact with a bearing it needs to be heat treated or have some sort of surface conditioning done. They need to be heat treated for wear and strength. From the factory they come heat treated, gm's are heat treated, so are ours.

 

atleast they searched that's a plus

 

Learn how to install a header/downpipe properly and you won't have issues.

+1 for ZZP, amazing company amazing products.

 

I had a zzp set lock up and snap the chain..ill never buy these from them again.

They need to be heat treated for wear and thermal expansion reasons.
And the gm ones being cast they dont expand much. But the alloy steel that is used in zzps expands more than the stock ones do.

 

http://s363.photobucket.com/user/Fil...g.html?filters[user]=80940851&filters[rec
http://s363.photobucket.com/user/Fil...g.html?filters[user]=80940851&filters[recent]=1&sort=1&o=0ent]=1&sort=1&o=

Did yours look like this???

 

 

Fixed

 

Im not knocking ZZP but I had there Stg 1 axles last less then 1k with less then 250whp using there rotated mounts with zero wheel hop, and Ive only ran these for less then 1500 miles. Hard miles but this should not have been an issue... anybody have the same problems?

 

that looks like they swelled from heat and torched it up the block is not junk but you will need to disassemble to fix I
it I can tell you how

doubt you will ever get a bearing to stay in place and this is the second set ive seen screw the pooch

 

Fixed? I need a new block, I took one picture yesterday and another a week back, so I'm in works of trying to source a Gen 3 and have my Diamond and K1 rods to be put into it. having Mongo build me up my short block and this time use a delete kit. Should be interesting.

 

Swelled from heat, like overheated bc my car overheated when it snapped the gear, but i think it snapped the gear from the NBS locking up...

I was already looking forward to getting a gen 3 block since they first came out ( GM girdled and additional bracing for coolant passages, whoot woot)but this way I can go ahead since I am going to disassemble anyway to look at everything else. I would still like to learn how to fix it though if you wouldnt mind Mr Belvedere

 

the gear snapped from the nbs locking up which in turn over heated due to the water pump not being turned

drill in to the side of the block drill and tap the oil feed for a pipe plug then weld the outer hole in block shut or tap it for a pipe plug

 

 

Seems my filter took the brunt of it before it washed the bearings, drove about total 4 miles after the car started overheating, so who knows how long after the bearing spun?? Surprisingly enough didnt hear any knocks...
My bearings look good and my crank looks good. Wonder if there is anything that ZZP has done for guys in my same boat who had issues with their NBS?

 

I fixed the image links, I'm sorry for your misfortune and wish you the best, wasn't trying to be mean.

 

get the crank checked because it looks does not mean it is

there is only 7 tenths of a thousands allowable were on these cranks

 

this is why i did the complete balance shaft delete for 100 bucks instead of buying the zzp shafts.

 

Yep Mongo will mic it, if needed he has some for purchase.

 

We had some issues quite some years ago with our NBS. We had 2 go arounds with our supplier, 2 separate issues and unfortunately quite a few people were affected. GM tech, who may or may not be banned was the most vocal about bashing ZZP and still is. He feels he knows better than anyone about everything and when we spoke on the phone he was offended that I didn't just take his word for everything and implement his changes. Turns out he was wrong about the cause of the failures and issues but even still we did implement his changes simply because there was no cost in doing so. It had nothing to do with heat treat or material.

The shafts didn't meet weight spec so we gave them back and the supplier bored the centers out to lighten them. In doing so it grew the outside diameter about a thou which was enough to cause them to bind in the motor when they reached operating temp. Machinist should have reground the outer diameter and never did. We should have checked them again and never did. Plenty of blame to go around but we did drop the ball.

Moving forward we implemented quite a few changes and more importantly test each and every one in a motor now. Since we started doing that 2-3 years ago, we haven't had an issue.

 

[/QUOTE=Shanman;7398612]Seems my filter took the brunt of it before it washed the bearings, drove about total 4 miles after the car started overheating, so who knows how long after the bearing spun?? Surprisingly enough didnt hear any knocks...
My bearings look good and my crank looks good. Wonder if there is anything that ZZP has done for guys in my same boat who had issues with their NBS?[/QUOTE]


I did a test a while back. I stuck the zzp NB shaft in a bearing oven at work along with a stock.
180* for and hr or more.
Pulley the stock out and he diameter did not change at no more than .0002
The zzp NB shaft grew .0035!!!!!!
i tryed to notify zzp of my findings but they clearly have no idea the differece between a alloy material and cast material from the response I got back. But oh well I avoid buying from them at all costs.
I just now run a Electric water pump and delete the chain

 

I did a test a while back. I stuck the zzp NB shaft in a bearing oven at work along with a stock.
180* for and hr or more.
Pulley the stock out and he diameter did not change at no more than .0002
The zzp NB shaft grew .0035!!!!!!
i tryed to notify zzp of my findings but they clearly have no idea the differece between a alloy material and cast material from the response I got back. But oh well I avoid buying from them at all costs.
I just now run a Electric water pump and delete the chain[/QUOTE]

I got some of the same **** from them when tried to inform of a clearance problem on the front cover and ati

 

I am sure the new change works well. From the looks of the pics on your website the new NBS have an oil passage machined around the whole bearing mating surface. I just rather delete the shafts all together since its all apart.

 

Is there a cutoff date where ZZP neutral balance shafts were not to spec? I have a pair from Aug 2012, I haven't run my car more than a few thousand miles in the past 2 years, but I'm hoping that they don't ever seize.