ADDITIONAL WENZLER / OLDS CYLINDER HEAD SPEC.'S
Valve spacing center to center - 2.020"
Valve seats are Durabond:
Intake valve seat 2.193 x 1.875 x .281 part#30984
Exhaust valve seat 1.784 x 1.500 x .312 part#71404
Precision Engine Parts Bronze valve guides. part#B5046
1/2" body, 11/32 id, machined with a shoulder and top is
machined to accept PC type valve seals.
Valve sizes supported:
Intake up to 2.15 head dia.
Exhaust up to 1.77 head dia.
Intake runner volume:
Approximately 192 c.c.'s.
As cast combustion chamber volume:
Approximately 75 c.c.'s.
Uses tapered seat extended reach spark plugs such as Champion S57YC.
Will accept standard Oldsmobile valve train components.
Such as Harland Sharp 1.6:1 roller rockers. (or equivalent)
Must use WENZLER intake manifold or fabricated intake.
Must use air gap valley cover available from Rocket Racing. ($25)
The heads are capable of flowing 350 cfm on intake with porting.
Spec's available from Rocket Racing.
Complete heads are available - add $400 - includes:
One pair fully machined heads with seats and guides.
One set of quality valves - Stainless swirl polished 2.11 intake , 1.72 exhaust.
Seals, springs, retainers, keepers.
Set up to support up to .600 intake lift.
Rocker arm studs.
Competition valve job.
Mild port cleanup 260 cfm intake, 170cfm exhaust. No charge if purchased as a complete set of heads.
Porting for one set of heads to 300 cfm. $350.
Porting for one set of heads for Bracket Racing A - $500. - flow ~320
Porting for one set of heads for Bracket Racing B - $750. - flow ~330
Porting for one set of heads for all out competition - $1,000 - flow ~350 +