 Re: oil restrictor to Heads
Brian,
Since you have a SBF use stand pipes in the 4 center valley drains and screens over the two rear drains & single large hole by the dist gear. DONT restrict the lifter galleries and either buy lifters with face / pin oilers or cut oiler grooves in each lifter bore as per Comp Cams article.
Use stand pipes at each end of cyl heads to raise running oil level in heads up to bottom of PC type stem seals ( drill small 0.060" hole at base of these stand pipes to allow drain back at shutdown ).
The stand pipes in valley force oil to drainback at rear & via timimg chain cavity to reduce windage.
Jac Mac |