Rear hub with 928 bearing and increased offset, 928 Hybrid trailing arm, 944 brakes, extended hub offset, parking brak Options

[Wilhelm]

Few pics of a project I'm working on to break up the misery or paint, bondo and rust removal on my V-8 SBC conversion. I'm going to do the sheridan body work on my car and found these wheels which I liked.




The problem is the wheels are 10 inches wide with an offset of 2 inches. In searching the web site it seems that most people with this combo have gone with 3" spacers. This seemed like it would put a lot of force on the bearing and I still would not have many other rear brake options. So.... I found some rear 928 hubs on ebay. the bearings are much larger: 85mm diameter and 47mm wide (versus stock 75mm diameter x 37mm long) and this would provide me with other 5 lug rear brake options. So off to the barn.



First, put a piece of 5 inch 1.25 inch wall DOM(Drawn Over Mandrel steel tubing) in the lathe.

[sww914]

What you've done looks great! Good ideas for sure.
My only concern now is all the extra torque that distance will put on the stock trailing arm. Do you plan to reinforce it somehow or deal with that problem if it arises?

[Wilhelm]

What you've done looks great! Good ideas for sure.
My only concern now is all the extra torque that distance will put on the stock trailing arm. Do you plan to reinforce it somehow or deal with that problem if it arises?

Doubt moving the bearing outward transmits any additional torque to the trailing arm compared to a stock arm with a 3" spacer and this same wheel or a stock arm with a deep offset wide wheel and no spacer. This design puts a lot less torque on the bearing compared to a spacer setup. Plus the bearing is substantially hurkier. Certainly comparing this trailing arm to a stock one with a stock wheel there will be additional torque applied to the arm. I have a set of stock sheet metal arm reinforcements shells I can weld on, but my hunch is they are better at adding weight than strength. I did a search on arm reinforcements where tubes were welded across the insides of the trailing arms. Unfortunately the pics of this thread are all gone. Guess it was a proprietary secret? Think most likely I will run a diagonal from the hub adjacent to the back of the parking brake plate forward at 45 degrees to the outside of the trailing arm keeping it inside of the wheel rim. Anyone have better ideas?

[PeeGreen 914]

What you've done looks great! Good ideas for sure.
My only concern now is all the extra torque that distance will put on the stock trailing arm. Do you plan to reinforce it somehow or deal with that problem if it arises?

Doubt moving the bearing outward transmits any additional torque to the trailing arm compared to a stock arm with a 3" spacer and this same wheel or a stock arm with a deep offset wide wheel and no spacer. This design puts a lot less torque on the bearing compared to a spacer setup. Plus the bearing is substantially hurkier. Certainly comparing this trailing arm to a stock one with a stock wheel there will be additional torque applied to the arm. I have a set of stock sheet metal arm reinforcements shells I can weld on, but my hunch is they are better at adding weight than strength. I did a search on arm reinforcements where tubes were welded across the insides of the trailing arms. Unfortunately the pics of this thread are all gone. Guess it was a proprietary secret? Think most likely I will run a diagonal from the hub adjacent to the back of the parking brake plate forward at 45 degrees to the outside of the trailing arm keeping it inside of the wheel rim. Anyone have better ideas?

Eric Shea does the tubes that strengthen the arms. I would think you would be well advised to do something like that as you are putting more stress on the arm. The bearing I am sure is fine but the arm is now the weak point. May be fine as it is though. Nice work (IMG:style_emoticons/default/aktion035.gif)