Block Strength

Sorry for taking so long to get back on here. I'm gonna track down a camera and take some pictures this weekend. The rod broke right at the cap. Dad got pictures to eagle and they told us the rod was a victim not the cause (who knows). That motor had seen regular trips to 6-6200 rpm pretty much at least once everytime it was driven. It looks as if the lower 2-3" of cylinder wall gave way. When it popped it was runnig around 42-4500 and getting traction hard. A local engine builder did mention something about too much cylinder pressure causing that and he also mentioned that if a wrist pin starts to sieze it could cause a failure like that. Still boggles the mind why that happened. That block had been bored .030 over for 22 years. Looking at how its gonna go back together, i think we are going to go stock bore with the 4" crank and up the compression from 10:1 to around 10.5-10.75:1. More details to come after the weekend.