Ronnieroadster
Well-known member
Since one of my passions has been Land Speed Racing a Ford flathead engine
at Bonneville there's a number of rules related to safety that require some creativity when a safety item part is not available. One safety rule requires a 1/4 inch thick steel shield to contain any flywheel and clutch failures from exiting the bellhousing area of the engine.
Here's a couple of pictures of how we address this containment rule. We start with a Lakewood SFI scatter shield made for the 289 -351 small block Ford.
With some effort we first transfer the 8BA dowl pin locations to the flange surface of the Lakewood bell. The important part of this step is to be sure the bell is as close to the crank shaft center line as possible. We ended up with .0005 off center well with in the tolerance needed.
With the dowl pin location set we then drill the 8BA bolt pattern on the bell housing. And then the final step is adding the bolt pattern for the flathead starter plate. Since the bell housing is 1/4 inch thick to hold the starter plate to the bell housing flange we simply tap the flange 5/16 coarse thread so no nuts are needed to hold the plate.
Two days of weekend work sessions and my son and I now have a bullet proof bell housing that meets the rules perfectly.
Ronnieroadster
at Bonneville there's a number of rules related to safety that require some creativity when a safety item part is not available. One safety rule requires a 1/4 inch thick steel shield to contain any flywheel and clutch failures from exiting the bellhousing area of the engine.
Here's a couple of pictures of how we address this containment rule. We start with a Lakewood SFI scatter shield made for the 289 -351 small block Ford.
With some effort we first transfer the 8BA dowl pin locations to the flange surface of the Lakewood bell. The important part of this step is to be sure the bell is as close to the crank shaft center line as possible. We ended up with .0005 off center well with in the tolerance needed.
With the dowl pin location set we then drill the 8BA bolt pattern on the bell housing. And then the final step is adding the bolt pattern for the flathead starter plate. Since the bell housing is 1/4 inch thick to hold the starter plate to the bell housing flange we simply tap the flange 5/16 coarse thread so no nuts are needed to hold the plate.
Two days of weekend work sessions and my son and I now have a bullet proof bell housing that meets the rules perfectly.
Ronnieroadster


