What's the reccomended red line on a carbureted 302? It's mainly aftermarket parts and it's manual.
Red Line
- Thread starter Superformance
- Start date
redline depends on many things like;
1: valve springs
2: cam profile
3: valve size and material
4: lifter type and weight
5: pushrods
6: intake
7: heads
8: exhaust
9: compression ratio
the above determines horsepower and torque curves, and the ability to control valvetrain motion and weight. you can have a cam profile, intake, heads, and exhaust that will allow an engine to turn 9k rpm, but if the valve springs are weak, the engine wont rev that high. we need alot more information before we can give an accurate estimate. that said however, if this is a street engine, and you have the right valve spring for the cam you choose, then i would say stay below 6500 rpm for a maximum rpm, and shift(when in a performance setting like at the track) at around 5500 rpm(dont take that as gospel, you need to experiment to see what works best for your combination. i just gave you a starting point). that should keep your engine healthy for a long time, assuming you take proper care of it.
1: valve springs
2: cam profile
3: valve size and material
4: lifter type and weight
5: pushrods
6: intake
7: heads
8: exhaust
9: compression ratio
the above determines horsepower and torque curves, and the ability to control valvetrain motion and weight. you can have a cam profile, intake, heads, and exhaust that will allow an engine to turn 9k rpm, but if the valve springs are weak, the engine wont rev that high. we need alot more information before we can give an accurate estimate. that said however, if this is a street engine, and you have the right valve spring for the cam you choose, then i would say stay below 6500 rpm for a maximum rpm, and shift(when in a performance setting like at the track) at around 5500 rpm(dont take that as gospel, you need to experiment to see what works best for your combination. i just gave you a starting point). that should keep your engine healthy for a long time, assuming you take proper care of it.
Hack
15 Year Member
Almost everything in the motor has to be just right to get a high redline. In addition to the items listed above, pistons, rods, rod bolts, oiling system.. also the preparation of those parts. Things like balancing, polishing can make a difference too.
Just to let you know what I've done.
I've got a high volume oil pump, Canton 7 quart pan, double springs, hydraulic cam with a powerband up to 5800, complete new bearings, and Cleveland heads with 4v exhaust valves and 2.055 intakes and it's all balanced. If I rev 7k I'll be worried. Unless you really build your motor to turn high RPM's keep it simple. 5500 is normally about as high as you'd want to go unless you know every detail about the thing.
I've got a high volume oil pump, Canton 7 quart pan, double springs, hydraulic cam with a powerband up to 5800, complete new bearings, and Cleveland heads with 4v exhaust valves and 2.055 intakes and it's all balanced. If I rev 7k I'll be worried. Unless you really build your motor to turn high RPM's keep it simple. 5500 is normally about as high as you'd want to go unless you know every detail about the thing.
Superformance said:
To answer your question as it was asked.....
About that high. Give or take a few thousand RPM.
302 ROLLER BLOCK
NODULAR CAST IRON CRANKSHAFT
SHOT PEENED & STRESS RELIEVED CONNECTING RODS WITH 190,00 PSI ARP BOLTS
HYPEREUTECTIC FEDERAL MOGUL 10 TO 1 COMPRESSION
SPEED PRO CHROME MOLY PISTON RINGS
3 PIECE STEEL ROLLER STYLE TIMING CHAIN
COMP CAMS HYDRAULIC ROLLER CAMSHAFT
HIGH VOLUME MELLING OIL PUMP AND SCREEN
ELELBROCK RPM POLISHED ALUMINUM HEADS 60CC COMBUSTION CHAMBER WITH BRONZE GUIDES
2.02 STAINLESS STEEL SWIRL POLISHED INTAKE VALVES
1.60 STAINLESS STEEL SWIRL POLISHED EXHAUST VALVES
HARD SEATS FOR UNLEADED OR REGULAR FUEL
HEAVY DUTY 1.45 DIAMETER VALVE SPRINGS, 7 DEGREE LOCKS
HEAVY DUTY CHROME MOLY PUSH RODS
FRONT SUMP 5 QUART OIL PAN
TIMING CHAIN COVER WITH SCALE
CHROME BAFFLED VALVE COVERS
HEAVY DUTY MANUAL FLYWHEEL
EDELBROCK PERFORMER RPM POLISHED ALUMINUM INTAKE MANIFOLD
4 BARREL 650 CFM EDELBROCK POLISHED CARBURETOR WITH ELECTRIC CHOKE
HIGH ENERGY IGNITION DISTRIBUTOR
53,000 VOLT COIL PAK
NODULAR CAST IRON CRANKSHAFT
SHOT PEENED & STRESS RELIEVED CONNECTING RODS WITH 190,00 PSI ARP BOLTS
HYPEREUTECTIC FEDERAL MOGUL 10 TO 1 COMPRESSION
SPEED PRO CHROME MOLY PISTON RINGS
3 PIECE STEEL ROLLER STYLE TIMING CHAIN
COMP CAMS HYDRAULIC ROLLER CAMSHAFT
HIGH VOLUME MELLING OIL PUMP AND SCREEN
ELELBROCK RPM POLISHED ALUMINUM HEADS 60CC COMBUSTION CHAMBER WITH BRONZE GUIDES
2.02 STAINLESS STEEL SWIRL POLISHED INTAKE VALVES
1.60 STAINLESS STEEL SWIRL POLISHED EXHAUST VALVES
HARD SEATS FOR UNLEADED OR REGULAR FUEL
HEAVY DUTY 1.45 DIAMETER VALVE SPRINGS, 7 DEGREE LOCKS
HEAVY DUTY CHROME MOLY PUSH RODS
FRONT SUMP 5 QUART OIL PAN
TIMING CHAIN COVER WITH SCALE
CHROME BAFFLED VALVE COVERS
HEAVY DUTY MANUAL FLYWHEEL
EDELBROCK PERFORMER RPM POLISHED ALUMINUM INTAKE MANIFOLD
4 BARREL 650 CFM EDELBROCK POLISHED CARBURETOR WITH ELECTRIC CHOKE
HIGH ENERGY IGNITION DISTRIBUTOR
53,000 VOLT COIL PAK
A COMP CAMS HYDRAULIC ROLLER CAMSHAFT is somewhat of a general spec.
They do actually make more than one hydraulic roller grind for a SBF.
However, going off your cylinder heads, carb etc we can now estimate that with a well selected camshaft your RPM redline will be in 6000+ RPM range.
They do actually make more than one hydraulic roller grind for a SBF.
However, going off your cylinder heads, carb etc we can now estimate that with a well selected camshaft your RPM redline will be in 6000+ RPM range.
Hack
15 Year Member
Will the high volume oil pump with a 5 quart pan pump the oil pan dry? Or is that only a Cleveland issue?
hack, no, you are right...a lot of times a high volume pump will run a pan dry...without the driver even knowing it. It can be ocrrected by welding in a sump, but most people just run an extra quart or two of oil.
Superformance, Why are you concerned with your redline? You should be concerned with what your engine's powerband is and at what RPM it makes th most HP.
Superformance, Why are you concerned with your redline? You should be concerned with what your engine's powerband is and at what RPM it makes th most HP.
66P51GT
New Member
Without considering anything else, your prepped stock rods and nodular iron crank are good to 6500 for short periods of time. If you plan on open track for longer durations at high RPMs, consider a different engine build.
You also didn't mention rocker arms and stud size. This will also affect safe RPM levels. If you have 7/16" studs and high quality rocker arms such as Crane Gold or Comp Cams Aluminum, Stainless, or Magnum Pro and stud girdle. RPM can surpass 7,500.
Stamped steel or roller tips style and you are pushing it over 6,000.
You also didn't mention rocker arms and stud size. This will also affect safe RPM levels. If you have 7/16" studs and high quality rocker arms such as Crane Gold or Comp Cams Aluminum, Stainless, or Magnum Pro and stud girdle. RPM can surpass 7,500.
Stamped steel or roller tips style and you are pushing it over 6,000.
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