main bearings

[71dustar]

i'm in the process of building my 408 stroker (magnum) and i need standard size main bearings. i have a 4" stroke cast eagle crank so which would be the best, 1/2 groove, 3/4 groove, or full groove? also i only found one company on summit that supply magnum bearings which is clevite p-series.

 

[moper]

I like to keep the clearances tight (.0015 to .0025 on mains if possible) and I run the 3/4 groove bearings. If this is a race engine, go full groove.