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Jim Brierley · 02-10-2020, 12:31 PM

What Phil Brown says is right on! I run B blocks with C cranks, and have 2 that are all babbitt and stock oiling, both have been run in my speedster. One was first run in my wide-bed for many years and miles, with a 7.5:1 Cyclone head. That one got its peak HP at 3900 RPM on the dyno, the other has been run at hill-climbs at 4100 RPM, with no problems. The theory is that the bearings ride on a thin film of oil, not directly on the babbitt. Rods do not hold up as well as mains, but are good for many, many miles.

02-10-2020, 12:31 PM	#10
Jim Brierley Senior Member Join Date: Jun 2010 Location: Temecula, CA Posts: 4,092	Re: High compression engine life. What Phil Brown says is right on! I run B blocks with C cranks, and have 2 that are all babbitt and stock oiling, both have been run in my speedster. One was first run in my wide-bed for many years and miles, with a 7.5:1 Cyclone head. That one got its peak HP at 3900 RPM on the dyno, the other has been run at hill-climbs at 4100 RPM, with no problems. The theory is that the bearings ride on a thin film of oil, not directly on the babbitt. Rods do not hold up as well as mains, but are good for many, many miles.