Publicidad
Idiomas disponibles
Idiomas disponibles
ZZ572/620 and ZZ572/720R High Performance Engine Assembly Specifications:
Compression ...............................................................................9.6:1 nominal for ZZ2572/620. 12:1 nominal for ZZ572/720R
Cylinder Head: ............................................................................Aluminum rectangular port with stainless steel valves
Valve Diameter (Intake/Exhaust): .................................... 2.25"/1.88"
Chamber Volume: ........................................................... 118cc
Dual valve springs
Average Spring Rate: ...................................................... 480 lbs.in for ZZ2572/620. 652 lbs.in for ZZ572/720R
Camshaft: .................................................................................. Hydraulic roller tappet for ZZ2572/620. Mechanical roller tappet
Lift: .................................................................................. .632" intake and exhaust for ZZ2572/620. .714" intake and
Duration: ......................................................................... 254° intake, 264° exhaust @ .050" tappet lift for ZZ2572/620
. ....................................................................................... 278° intake, 282° exhaust @ .050" tappet lift for ZZ572/720R
Centerline: ....................................................................... 109° ATDC intake, 119° BTDC exhaust
Advertised Duration: ........................................................ 316° intake, 326° exhaust @ .004" tappet lift for ZZ2572/620
........................................................................................ 310° intake, 314° exhaust @ .004" tappet lift for ZZ572/720R
Rocker Arm Ratio: ...................................................................... 1.7:1, Aluminum roller rocker
Timing Chain: ............................................................................. Heavy duty single roller design
Oil Pan: ......................................................................................6 - quart Gen VI
Oil Pressure (Normal): ............................................................... 55 psi @ 1500 RPM
........................................................................................ 63 psi @ 5000 RPM using 20w50 racing oil
Recommended Oil ..................................................................... 20w50 synthetic racing oil (after break-in)
Oil Filter: .................................................................................... AC Delco part # - UPF35L
Valve Lash ................................................................................. 1/2 turn down for ZZ2572/620. .014" cold and .020" hot for
Fuel: ........................................................................................ Premium unleaded - 92 (R+M/2) for ZZ2572/620. Race fuel - 110
Maximum Engine Speed: ........................................................... 6000 RPM for ZZ2572/620. 6750 RPM for ZZ572/720R
Spark Plugs: .............................................................................. AC Delco R45XLS for ZZ2572/620. AC Delco R42XLS for
Spark Plug Gap.......................................................................... .035"
Firing Order: ............................................................................... 1-8-4-3-6-5-7-2
Note: These specifications are in addition to those documented within the short block instructions.
Information may vary with application. All specifications listed are based on the Latest Production Information Available At The
Time Of Printing.
ZZ572/620 and ZZ572/720R Long Block Specifications
TITLE
for ZZ572/720R
exhaust for ZZ572/720R
ZZ572/720R
(R+M/2) for ZZ572/720R
ZZ572/720R
88962928
REV 16JA15
PART NO.
5
23
SHEET
OF
Publicidad
