Bill.  Received your email but not sure if you are getting mine back as I’m getting failure notices on the replies.

 

My material of choice for making hubs is ‘cold roll’ steel and go out of my way to not use ‘hot roll’.  Aluminum is also an option for the hub itself.  The bolt circle for the damper attaching bolts is 3.250” but one hole is offset so it’s easier to simply use transfer punches to locate the damper holes to the semi-finished hub than go to the trouble of indexing the holes in the hub on a rotary table or lathe.  Here’s a couple of pics of the hub that allows the ATI damper shell to be used on a Y.

 

Lorena, Texas (South of Waco)

http://www.jegs.com/i/JEGS/555/51652/10002/-1



Not ATI.



Hyvinkää, FI

Is the bottom picture the ATI dampner? Chuck, confused in NH

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

One picture is better than thousand words they say, so I made you a picture what can help somebody to choose.

...sorry my metric dimensions on picture.


Hyvinkää, FI

Here are the basic dimensions for a hub to use an ATI damper shell on the Y engine.

Side View

Top View

TDC key location

Lorena, Texas (South of Waco)

No.  The dampening portion of the ATI damper is simply wider than that of the Y damper.  With a belt pulley installed on the front of the ATI damper, the belt itself ends up being forward about ~ ¼“-½” more than the stock Y belt car and truck location.  Accessory pulleys will simply need to be spaced forward the appropriate amount to accommodate.

Lorena, Texas (South of Waco)

Would the length of the crankshaft spacer allow for the alignment of conventional pulley's? I know they are drilled for scrub but an aftermarket pulley is just a pulley.

Y's guys rule!
Looking for McCullouch VS57 brackets and parts. Also looking for 28 Chrysler series 72 parts. And early Hemi parts.

MoonShadow, 292 w/McCulloch, 28 Chrysler Roadster, 354 Hemi)
Manchester, New Hampshire

Charlie.  That damper would work.  Just do a search on this site for ATI damper regarding the other nuances regarding pulley bolt patterns and spacing as the damper thickness is still an issue with the correct hub.  Here’s just one discussion that’s not too old.  Damper discussion 

 

The pricing of the Y specific ATI damper with its corresponding hub has skyrocketted in the last couple of years.  It’s become completely out of the normal buying range compared to the prices of the normal catalogue offerings.  Blame that on being a special order whenever trying to get one as its not a stocking item.  But I will talk to them and see what it takes to get the pricing down to where it’s more affordable.

 

As far as the hub measurements go, I’ve got a Y specific ATI damper here and will take the hub loose from it so I can get the measurements.  As far as duplicating the threaded holes in the hub, using a set of center finders for the holes with the damper semi installed on the hub as it’s being reproduced will be easier than reverse engineering those particular measurements.  I’ll try to post this early next week as this sounds like a Saturday afternoon project.  And here’s a print that shows some of the measurements but may be too small to be easily readable for the site.

Lorena, Texas (South of Waco)

On the Burns Bros. new engine Charlie and I are just going to use the scrub hub and make a spacer out of an old Y damper as Ted described. That seems to be the least hassle and expense, also you don't have to buy "New" hubs eBay has used ones now and then if you want to take a chance. 

   God Bless.   Tim                           http://yblockguy.com/

350ci Y-Block FED "Elwood", 301ci Y-Block Unibody LSR "Jake", 312ci Y-Block '58 F-100, 338ci Y-Block powered Model A Tudor

tim@yblockguy.com  Visalia, California    Just west of the Sequoias

Yes, he talks about it in issue #89 of YBM. The drawing# is SK069. I won't describe it here but it's not a direct bolt on apparently. However it allows use of a SBC pulley if needed. This is just pass on info, I know squat about aftermarket Dampers...

Paul