moper....
If you grove the #4 journal of the cam so you have full time oiling then you have to install oil restrictors in the oil passages in the block.
In my max performance mopar big block book, it was suggesting to use spray bars as a means for additional oiling and also as a means of cooling the valve springs.
I guess it only takes about 5 pounds of oil pressure off your total oil pressure.
Andy finkbeiner also states in his book that when you grove the #4 cam journal you give even less oil to the #4 crank journal.
He has seen an engine with this set up spin the number 6 and 7 rod bearings in a dyno test, even though the back of the engine where the pressure was being measured showed a constant 70 pounds of oil pressure.
The more power we make the more problems rise up with stock blocks.
Most aftermarket blocks have addressed all these problems and are made with all the fixes already in the casting.
Ps Hemidenny..... I am building a 400 big block.
