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hotrodcbx · 02-09-2015, 08:17 AM

I have a 286" blown flathead running 5 Lb boost built by MCF. His main cap was unique as he incorporated a flat surfaced, pivoting cap on the end of the bolt and also machined a flat spot on main bearing cap. This eliminates any "point loads" on the bearing cap and ensures the pivoting cap on the bolt seats flat on the machined surface. The engine has 25,000 miles now with no problems.

02-09-2015, 08:17 AM	#9
hotrodcbx Senior Member Join Date: Jul 2010 Posts: 136	Re: Blower motor center main cap I have a 286" blown flathead running 5 Lb boost built by MCF. His main cap was unique as he incorporated a flat surfaced, pivoting cap on the end of the bolt and also machined a flat spot on main bearing cap. This eliminates any "point loads" on the bearing cap and ensures the pivoting cap on the bolt seats flat on the machined surface. The engine has 25,000 miles now with no problems.