My take on the oiling system crossover tube for the small block
high rev with hydraulic lifters ? what are the rpm parameters, I would think the stock system would support 6500 with the right valve spring, lifter and oil capacity. :)
In the MoPar engines book, they say 5500 rpm’s for regular cars. I read somewhere, IIRC, HP pumps were suggested for up to 6200/6300 rpm. No other modifications were mentioned as I remember it. The conservative rpm ceiling was due to irregular or non standardized machining of the oil feed holes throughout the block.
Some engines I have had in the past have had the oil passages drilled larger than others. Why this is I do not know. But these have served me well to 6500.
In all honesty, making power last this level requires a larger than normal cam one would find being used regularly in the street and it would more than likely be used with very well ported heads. Yes I’m guilty of the not normal crowd! LMAO!!!
Below are solid cam builds. Hydraulic cams normally fall off after 6500 if they go that high.
An excellent engine build AND (shown) dyno sheet of this can be found in threads by
@RAMM here where he has a solid lifter cam duration of
[email protected]. Peak HP is 6700 and only 2 hp difference than at 6500.
371 build W/Big Mouth heads
A little higher max rpm and some serious parts here;
360 Street/Strip Bruiser-Dyno results