kc0000
08-22-2002, 09:13 PM
I've decided..... After many weeks of research and agony over bidding on motors on EBay.... it is time to upgrade my motor.
Measuring the engine bay this weekend, if clearances allow I'll order the new motor project on Monday!
KC
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 .......................................510 @ 5500 RPM
Torque .................................................5 50 Ft Lbs @ 4500 RPM
Maximum Recommended RPM .....5800
Compression Ratio ............................9.6:1
Block .................................................. ..10237292 - Cast Iron 4-Bolt Mains
Crankshaft ..........................................10183723 - Forged Steel
Connecting Rods ..............................10198922 - Forged Steel
Shot Peened, 7/16" Bolts
Pistons .................................................. 12533507 - Forged Aluminum
Piston Rings ........................................12524293
Camshaft .............................................12336 543 - Hydraulic Roller
Lift: .527" Intake, .544" Exhaust
Camshaft Duration @ .050" .............224° Intake, 234° Exhaust
Timing Chain .......................................3891519 - Single Roller
Cylinder Heads ...................................12363390 - Aluminum Oval Port
110cc Combustion Chambers
Intake Valves ......................................12366987 - 2.25" Stainless Steel
Exhaust Valves ...................................12366988 - 1.88" Stainless Steel
Valve Springs ......................................12462970
Rocker Arms ........................................12523976 - 1.7:1 Ratio
Distributor....................................... ...... HEI
Valve Lash ............................................Zero
Fuel .................................................. ......92 Octane
Spark Plug ........................................... 25164642 Rapid Fire
Ignition Timing ....................................8° @ 800 RPM
36° Total @ 5000 RPM
Tech Tip
"Oil Filter & Oil Cooler Bypass Valves"
Excerpt from Speed Reading, written 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.
Measuring the engine bay this weekend, if clearances allow I'll order the new motor project on Monday!
KC
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 .......................................510 @ 5500 RPM
Torque .................................................5 50 Ft Lbs @ 4500 RPM
Maximum Recommended RPM .....5800
Compression Ratio ............................9.6:1
Block .................................................. ..10237292 - Cast Iron 4-Bolt Mains
Crankshaft ..........................................10183723 - Forged Steel
Connecting Rods ..............................10198922 - Forged Steel
Shot Peened, 7/16" Bolts
Pistons .................................................. 12533507 - Forged Aluminum
Piston Rings ........................................12524293
Camshaft .............................................12336 543 - Hydraulic Roller
Lift: .527" Intake, .544" Exhaust
Camshaft Duration @ .050" .............224° Intake, 234° Exhaust
Timing Chain .......................................3891519 - Single Roller
Cylinder Heads ...................................12363390 - Aluminum Oval Port
110cc Combustion Chambers
Intake Valves ......................................12366987 - 2.25" Stainless Steel
Exhaust Valves ...................................12366988 - 1.88" Stainless Steel
Valve Springs ......................................12462970
Rocker Arms ........................................12523976 - 1.7:1 Ratio
Distributor....................................... ...... HEI
Valve Lash ............................................Zero
Fuel .................................................. ......92 Octane
Spark Plug ........................................... 25164642 Rapid Fire
Ignition Timing ....................................8° @ 800 RPM
36° Total @ 5000 RPM
Tech Tip
"Oil Filter & Oil Cooler Bypass Valves"
Excerpt from Speed Reading, written 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.