Called ATI today and they said they don't sell this HUB ?????
Looking for the number of the BIG HUB duoble keyed and the balance Al with 10% underdrive

thx

 

My invoice says part # 916048B. "Crank hub - HT Allow Steel - Chevy LT1 Fbody Camar. Orig BO: 72837*2. $108.11"

They definetly sell it, a number of us have it already..

It's big block chevy Outside Diameter and Small block chevy inside diameter.

--Sean

 

How do you get this to work? Do you machine the hole on the timing chain cover or is it big enough already and use a different seal?

 

You have to machine the timing cover and get a new seal. The seal is available from ATI and they can also do the machining for you if you send them the timing cover. If you do a search on big block hub or ati superdamper, you will find a good amount of stuff on it..

--Sean

 

Go to page 48 and it has all the info.

http://www.atiracing.com/pdf/ATI_cat05v1.pdf

 

I don't know if you can buy it together with the balancer, I bought the balancer first and bought this at a later date, I've never seen a package offering with this hub. Also, it's steel, you won't find it in aluminum.

 

Ok, i don't get it. I'm looking at the catalog, page 48. The hub coices listed are either 2.331" or 1.940", but the timing covers are listed with 2.25 seals? What am i missing?

 

The ATI big block keyed hub for the small block chevy (part #916136-2 keyways) or (part #916135-1 keyway) have an inside diameter if 1.245", which is the same as the snout of the SBC crank (a little smaller I think). The outside diameter of this hub is the same as the big block chevy hubs which is 2.331". If you were building a standard SBC, you could buy a timing cover from ATI to go with the BB hub. Since most guys here are doind LT1's, like I am, you would have to either have a machine shop machine your timing cover to fit the BB hub of 2.331" or you can send it to ATI to have it machined for you and they can supply the proper seal.

 

Which is the cheaper route? $200 for a timming cover is a little steep!

-B

 

You don't need to speend that money, when you order the hub you get a seal, just take your timing cover to a machine shop and get them to bore it out to the seal, should only be about $50+ there are other people here that have don't it.

-jeremy

 

How much is the hub?