502
Ram Jet 510 HP engine
Call
us toll-free at 1-800-926-4977 ext. 1232 (or 330-792-5258) between 7:30 a.m. and
9 p.m. EST Monday through Friday and 8 a.m. 'til 4 p.m. Saturdays about this
exclusive Greenwood Chevy Performance Parts special!
The recipe is simple; one part
attitude, one part driving perfection, one part leading factory technology, and five
hundred and two parts hungry rat motor. Ram Jet 502, you either have one or you want
one! When the idea of an all new big-block fuel injection system first came up, we all thought
it was a good one. When it was proposed that it be integrated with our 502 crate engine,
we thought somebody clearly lost their mind. Who could possibly need the awesome, flat,
broad torque curve only available with a long runner dry manifold ? And who would want the
neck-snapping throttle response of MEFI 3 controlled port fuel injectors ? And what would
be the need for aggressive tunnel ram styling ? But then we remembered we're not building
100 mile per gallon, 0 to 60 in a week, econo-scooters. We're in the hot rod business ! So
we called together engine management system experts from GM Powertrain, our own GMPP
engineers, and fuel injected race engine builder and GMPP Pro Mod racer Harold Martin.
After some great discussions, a little debate, a lot of late nights and 50 gallons of
coffee we had an intake manifold design like no other. By leveraging leading fuel
management technology, numerous production developed components, the industry standard
MEFI 3 controller and the great Ram Jet name from the 1950's, the Ram Jet 502 is a
reality.
The new undisputed heavy weight champion, the Ram Jet 502, makes 510 horsepower at 5500
RPM and 550 Ft/Lbs of torque at 4500 RPM. But the real story is the torque curve, the Ram
Jet 502 makes more torque throughout its operating range. This is possible because Ram Jet
has a larger plenum and runners than would ever be possible in a carbureted application.
This means greater intake efficiency and greater torque without sacrificing
driveability.
The Ram Jet manifold is so efficient that we're able to make all of this horsepower and
torque with a production L98 throttle body assembly, you know, the one that Firebird and
Camaro owners always replace when trying to make more power in their 350ci engines. It's
all about airflow quality, velocity, and fuel and spark management. You'll just have to
drive one to appreciate it. If the one-second cold starts, no stalling, instant throttle
response, and the solid pull from idle to red line don't convince you that a Ram Jet 502
is for you, then maybe we could interest you in a 100 mile per gallon, 0 to 60 in a week
econo-scooter !
The Ram Jet 502 is not intended for marine use, and should only be used in 1973 and
earlier pre-emissions street vehicles or any year off road vehicles.
Technical Notes: Do not use bolt sealer on the cylinder head bolts, the holes are blind
tapped. The long block kit includes partial engine, cylinder heads, valve covers,
valvetrain, and fasteners and gaskets for the parts included. The complete engine kit
includes the long block kit plus intake manifold, carburetor, distributor, water pump,
spark plugs, spark plug wires with looms and additional fasteners and gaskets.
Ram Jet 502 Technical Information
Horsepower
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510 @ 5500 RPM
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Torque
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550 Ft Lbs @ 4500 RPM
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Maximum Recommended RPM
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5800
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Compression Ratio
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9.6:1
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Block
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10237292 - Cast Iron 4-Bolt
Mains
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Crankshaft
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10183723 - Forged Steel
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Rods
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10198922 - Forged Steel Shot Peened, 7/16" Bolts
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Pistons
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12533507 - Forged Aluminum
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Piston Rings
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12524293
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Cam
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12336543 - Hydraulic Roller Lift: .527" Intake, .544" Exhaust
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Camshaft Duration @ .050"
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224° Intake, 234° Exhaust
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Timing Chain
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3891519 - Single Roller
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Heads
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12363390 - Aluminum Oval Port 110cc Chambers
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Intake Valves
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12366987 - 2.25" Stainless
Steel
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Exhaust Valves.
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12366988 - 1.88" Stainless Steel
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Valve Springs
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12462970
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Rocker Arms
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12523976 - 1.7:1 Ratio
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Distributor
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HEI
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Valve Lash
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Zero
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Fuel
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92 Octane
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Spark Plug
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25164642 Rapid Fire
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Ignition Timing
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8° @ 800 RPM 36° Total @ 5000 RPM
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Tech Tip
"Oil Filter & Oil Cooler Bypass Valves"
From Speed Reading by Wade Hajek of GM Performance Parts
Gen V and Gen VI big-block crate engines come with two oil pressure bypass valves
installed in the engine blocks. Both of these valves are rated at 11 psi pressure
differential. One valve is for the oil filter and the other is for the production oil
cooler. If you install an aftermarket oil cooler or remote oil filter that attaches to the
oil filter pad on the engine block, you should be aware that you need to change the oil
filter bypass valve in the engine block. The aftermarket oil lines add resistance which
will cause the bypass valve to bypass the aftermarket oil cooler and/or oil filter all the
time. Obviously, if the cooler and filter are bypassed the oil will be dirty and hot. Your
engine could run hotter and could be damaged by dirt in the oil. If you choose to use an
aftermarket cooler or remote oil filter that attaches to the pad, you should change the
bypass valve to one with a higher differential pressure rating. A good choice would be GM#
25161284 which is rated at 30 psi. Remove the valve that is closest to the crankshaft and
replace it with the new valve. Press the new valve into the engine block and stake it in
three places. You should note that the bypass valves don't need to be changed if you use a
production oil cooler which uses the production holes in the engine block and you don't
use a remote oil filter. Also, if you use an adapter that just angles the filter for
clearance you don't need to change the bypass valves.
Part number #12499121
Just
$9,699.00*
*
Price subject to change without notice
GM
PARTS WARRANTY INFORMATION:
Due
to the nature and intended usage of GM Performance Parts, the parts available on
this website and in our walk-in store (except for engines and partial engines)
are sold without any express or implied warranty of merchantability or fitness
for a particular purpose. The entire risk as to the performance of such parts is
with the buyer. Should such parts prove defective following their purchase, the
buyer and not the manufacturer, distributor, or retailer, assumes the entire
cost of all necessary servicing, repair, damage or loss to property and
consequential damage. "Engine and Partial Engine Warranty" under the
provisions of the General Motors Dealer Service Parts and Accessories Warranty
Section 1.1.3a, engines and partial engines, including partial engines in kits,
are warranted against defects in materials and workmanship. This warranty
specifically excludes engines and partial engines used in racing or competition
or that fail as a result of alteration. These engines and partial engines are
not designed or approved by General Motors for marine use. Installation of GM
Performance Parts may adversely affect GM New Vehicle Warranty. Please consult
your dealer for terms and conditions.
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