We are making 2230 H.P. with 36 lbs boost in a 406 cu.in. SB2.2 using Crower steel rods and Federal Mogul V bearings.we have had absolutely no bearing problems or failures. Aluminum rods shouldn't be used for any endurance application such as circle track or marine,those engines get more cycle time in a 1/2 hr than a drag race engine gets in a lifetime.
A lot of builders have realized that other than top fuel, light weight steel rods will retain there big end shape much better than aluminum rods and expand at 1/2 the amount providing better backing for the bearing.In the last few years we have switched all of our N20 stuff to steel,Its sure nice not to have to worry about the rods when you get 60/70 passes on them, the steel rods run for years.Bill