'Pressure' is defined as, resistance to flow. I'll use the garden hose example becuse it applies. When the hose is unrestricted, pressure is very little but flow is at max. Put your thumb over the end, and pressure rises but flow slows proportionally.
There are different ways to restrict oil flow. I like using aluminum heads and I tap the oil hole in the second stand with 1/4'-20 threads. Some guys use a brass carb jet because it has a head. I use a set screw but I let shallow threads stop the depth.
FE engines run at idle with FIVE PSI oil pressure. To me, that's too low. I want to see 20-psi or more at idle and 45+PSI at running speeds. In order to get these results, a HIGH VOLUMN oil pump needs to be installed with restrictions in the heads. It's the classic 'thumb over the hose' affect. Rather than running all the flow unrestricted through the rocker shafts, they simply don't need that much oil so I restrict it. As a result, oil pressure at idle speed raises.
Oil pressure comes at a cost. The oil pump driveshaft and distributor gear deliver more hp than the stock setup. The pressure relief valve also dumps more oil back into the pan at high rpms because proper pressure is attained and 100% flow is not needed. Were's the benefit? At low rpms when extra demand is put on the main bearings. The crank always needs to be floating and suspended in oil pressure. 5-psi ain't gunna make it.
A double-row true roller timing chain needs to power the roller cam, distributor, and oil pump. These are only available for 1963 (and later years).
BTW, what distributor gear did you get for your new Comp cam? - Dave
There are different ways to restrict oil flow. I like using aluminum heads and I tap the oil hole in the second stand with 1/4'-20 threads. Some guys use a brass carb jet because it has a head. I use a set screw but I let shallow threads stop the depth.
FE engines run at idle with FIVE PSI oil pressure. To me, that's too low. I want to see 20-psi or more at idle and 45+PSI at running speeds. In order to get these results, a HIGH VOLUMN oil pump needs to be installed with restrictions in the heads. It's the classic 'thumb over the hose' affect. Rather than running all the flow unrestricted through the rocker shafts, they simply don't need that much oil so I restrict it. As a result, oil pressure at idle speed raises.
Oil pressure comes at a cost. The oil pump driveshaft and distributor gear deliver more hp than the stock setup. The pressure relief valve also dumps more oil back into the pan at high rpms because proper pressure is attained and 100% flow is not needed. Were's the benefit? At low rpms when extra demand is put on the main bearings. The crank always needs to be floating and suspended in oil pressure. 5-psi ain't gunna make it.
A double-row true roller timing chain needs to power the roller cam, distributor, and oil pump. These are only available for 1963 (and later years).
BTW, what distributor gear did you get for your new Comp cam? - Dave
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