Big Block Chevy 502
complete 502/Ram Jet
||GM Part # 12568778
450 HP 550 Torque
DESCRIPTION: 502 HO ENGINE
There is no replacement for displacement, and torque is
king. With 550 Ft. Lbs. of torque the 502 HO will launch your car harder
than you thought possible. With its 450 horsepower and awesome torque
the 502 HO may have the best power to dollar ratio going. If your car is
all steel, you'll appreciate the power of the 502 HO and if your car is
a light weight racer, say 2300 pounds, the 550 ft.lbs. of torque will
put a big ol' grin on your face. This engine is awesome. Starting with a
Gen VI four bolt main block, we fill it with forged pistons, forged 4340
steel connecting rods with 7/16" bolts, a 1053 forged steel crankshaft,
and a steel roller camshaft. Then we torque down a pair of big breathing
rectangular port heads with 2.19" intake and 1.88" exhaust valves. With
their 118cc combustion chambers yielding a streetable 8.75 to 1
compression ratio, this engine is ready to rock on readily available
pump premium. We then top it all off with an aluminum dual plane intake
manifold and dress the engine with a cast iron water pump, 6 quart oil
pan, windage tray, 14" flexplate and torsional damper. So, all you need
to do is provide an 750 cfm carburetor, HEI ignition system, headers
with 2"x30" primaries and low restriction mufflers and a car with big
sticky tires. Sounds simple, and it is. Check with your GM Performance
Parts Authorized Center for specific oil pan needs for your application.
The 502 HO requires an electric fuel pump because the 502 Gen VI block
has no mechanical fuel pump boss. The 502 HO is not intended for marine
use, and should only be used in 1975 and earlier pre-emissions street
vehicles or any year off road vehicles.
||GM Part # 12496963
DESCRIPTION: 502 HO ENGINE
America’s favorite big-block
crate engine is now available fully assembled. All the same great parts
used in the ZZ502 kit engines, but fully assembled for easier
installation in your hot rod.
The Base Engine is a fully assembled long block with
valve covers and valve train. The Base Engine includes a fully assembled
short block with 2.25” intake aluminum heads, valvetrain, aluminum valve
covers, torsional damper and 14” automatic transmission flexplate.
The king of all big block crate engines is the
ZZ502/502, with torque and horsepower that will have you grinning and
streetable manners that have your competition wondering what hit them.
The ZZ502/502 represents our latest and best efforts to develop awe
inspiring big block power in a dependable, durable and drivable big
block crate engine.
With it’s big valve aluminum heads, roller camshaft and complete
dyno tuned induction and ignition system, this is as close as you can
come to a custom built 502 at crate engine prices.
The ZZ502/502 makes extensive use of aluminum to keep weight down.
This king of the crate engines is full of heavy duty parts, to ensure
that it will be making awesome power for a long time. With it’s forged
aluminum pistons, forged steel connecting rods with 7/16” bolts, forged
steel crankshaft, four bolt main block, stainless steel valves, 6 quart
oil pan, and windage tray, the ZZ502/502 seems more like a custom race
engine than a crate engine. With a 5800 RPM redline it might just feel
more like a custom race engine than a crate engine too.
For anyone looking for more power - GM Performance Parts has
designed the hot rodder’s ultimate dream engine. Everything you need to
beef up your 1967 or older passenger car or any year off highway
vehicles is included in this 502ci/502hp engine. This engine produces a
staggering 502 hp with 567 lb ft of torque with a modest 9.6:1
compression ratio. This engine also features an all new oval port
aluminum cylinder head design with 2.25” intake and 1.88” exhaust valves
and 11/32” valve stems.
||GM Part # 12496962
502 HP 567 Torque
DESCRIPTION: ZZ502 Deluxe ENGINE assembled
America's favorite big-block crate engine is now available fully
assembled. All the same great parts used in the ZZ502 kit engines, but
fully assembled for easier installation in your hot rod, street rod or
sportsman racer. Available in two versions, base (P/N 12496963) and
deluxe (P/N 12496962). The base engine is a fully assembled long block
with valve covers and valve train. The deluxe is a complete engine from
intake manifold to pan. (Carburetor and starter included but not
installed because of crating.) See GM # 12496963 for further
||GM Part # 12499121
502 HP 565 Torque
DESCRIPTION: NEW 502 RAMJET ENGINE w/MEFI 4
Ram Jet 502, you either have one or you want one. With 502 horsepower at
5100 rpm and 565 ft-lbs of torque at 3200 rpm, the instantly throttle
responsive Ram Jet 502 drives like no other big-block you've ever
driven. With over 500 lb. of torque from 2200 to 5200 rpm the ram Jet
502 is a tire shredding monster. Designed for ease of installation the
Ram Jet 502 needs only 12V, ground, fuel feed and fuel return to run.
Included are an instruction sheet, service manual and diagnostic tool
for ease of installation and service. As with any GM Performance Parts
Ram Jet engine, an in tank fuel pump is recommended to avoid possible
vapor lock. See the instruction sheet for fuel pump recommendations.
Also included is complete throttle linkage that accepts your production
throttle cable and transmission cable. Includes pre-programmed MEFI 4
ECM and wiring harness. The Ram Jet manifold stands eleven inches tall
as measured from the front and rear "china wall" on the cylinder block.
That's just half an inch taller than a typical single plane high rise
manifold, Holley carb and air cleaner combo.