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Home :: Oldsmobile :: Oldsmobile V8 39 260-455 1967-1990
Oldsmobile V8 39° 267-455 1967-1990

1-Oldsmobile-39°-V8--1967-1990-OE-Muscle-Hydraulic-Flat-Tappet-Camshafts-HRC 510021
cam recommendation_btnAll Howards™ Cams use the highest-grade race quality cores available. All hydraulic and mechanical flat tappet camshafts are 100% Rockwell checked and Parkerized to ensure the highest quality control standards available anywhere. Howards™ Cams are manufactured on dedicated high precision cam grinding machines. Most Howards™ Cams are packaged and shipped in our unique, hard, high impact plastic reusable cases. This ensures that the high quality camshaft that went into the case comes out in the same condition, when delivered, as when it was packed.







Cam Part No. Cam & Lifter Set Part No. Duration
IN
Advertised
EX
Duration
IN
@.050"
EX
Valve w/1.60
IN
Lift Rockers
EX
Lobe Separation Angle Intake Centerline Valve
IN
Lash
EX
Notes
510011-12 CL510011-12 259 269 205 215 .448 .475 112 106 Hyd. Hyd. 1
800-4800  OE & Performance replacement. Increased low end torque.     
510931-11 CL510931-11 267 267 213 213 .480 .480 111 107 Hyd. Hyd. 1
1200-5500  Good low end & mid-range. Will work well in jet boats.      
510021-12 NA 267 277 213 223 .480 .480 112 106 Hyd. Hyd. 1
1200-5800  Street Performer/Hot Jet Boats. 4 barrel & good exhaust a must.     
510991-08 CL510991-08 275 275 221 221 .501 .501 108 104 Hyd. Hyd. 1
1500-5800  Good low & mid-range horsepower. Needs 4 barrel & headers.     
511431-10 NA 281 287 227 233 .512 .512 110 106 Hyd. Hyd. 1
2400-6000  Lopey idle, Strong mid range. Good throttle response. 2400+ stall.     
511431-12 CL511431-12 281 287 227 233 .512 .512 112 108 Hyd. Hyd. 1
2400-6200  Fair idle, Street/Strip, broad mid range power. Needs 4 barrel & headers.    
510041-10 CL510041-10 289 299 235 245 .520 .544 110 105 Hyd. Hyd. 1
2600-6400  Lopey idle, Street/Strip or nostalgia. Likes headers & gears.     
510041-12 NA 289 299 235 245 .520 .544 112 107 Hyd. Hyd. 1
2400-6400  Fair idle, strong mid-range. Best with 9.5:1+. Also good in jet boat.     
511251-08 NA 299 307 245 253 .544 .560 108 104 Hyd. Hyd. 1
3200-6800 Pro Street/Brackets, Strong mid & upper end power. 10.0:1+ CR.     
519991 NA Custom Grind Camshaft
Hydraulic Flat Tappet Special Order Camshaft.       
Hyd. Hyd. 1


OE Muscle Hydraulic Flat Tappet Camshafts          
517771-09 NA 250 264 187 200 .400 .402 109 106 Hyd. Hyd. 1
800-4200  Near duplicate of the Olds 310HP/350 cam (GM #400084).     
517441-10 NA 272 294 196 208 .413 .414 110 111 Hyd. Hyd. 1
1000-4400  Near duplicate of the Hurst/Olds 375HP/455 cam (GM #400117).     
517241-13 NA 308 308 232 232 .474 .474 113 112 Hyd. Hyd. 1
2400-6000  Near duplicate of the Olds W-31 325HP/350 cam (GM #402194).     


Max Certified Hydraulic Flat Tappet Cam & Lifter Sets          
MC510931-11 NA 267 267 213 213 .480 .480 111 107 Hyd. Hyd. 1
1200-5500  Good low end & mid-range. Will work well in jet boats.      
MC510991-08 NA 275 275 221 221 .501 .501 108 104 Hyd. Hyd. 1
1500-5800  Good low & mid-range horsepower.  Needs 4 barrel & headers.     

Camshaft Notes

1. Stock (O.E.) valve springs cannot be used.
2. Requires thrust button.
3. Cam and lifter sets with "DL" suffix feature Direct Lube™ lifters.
4. Ignition firing order must be changed to 1-8-7-3-6-5-4-2.
5. Requires upgraded distributor gear.
6. Requires 3-Bolt timing set.
7. Requires use of Retro-Fit Tie Bar Hydraulic Roller Lifters.
8. Includes 2 camshafts.
9. Includes 4 camshafts.
10. Ignition firing order must be changed to 1-3-7-2-6-5-4-8.
11. Ignition firing order must be changed to 1-8-7-2-6-5-4-3.
12. Requires custom programmer/tuning.
13. Requires adjustable valvetrain.
14. No specific vacuum rating is guaranteed.
15. Lobes designed to take maximum advantage of .904" dia. lifter.
16. Lobes designed to take maximum advantage of .875" dia. lifter. 

 


3-Oldsmobile-39°-V8--1967-1990-4-7-Swap-Retro-Fit-Hydraulic-Roller-Camshafts-HRC 51XXX5
cam recommendation_btnPremium materials and advanced engineering to deliver unbelievable power. These cams offer significant advantages of additional lift and more power compared to flat tappet designs. The latest in lobe design produces better throttle response and top end horsepower. Designed with fast ramp speeds to give you the most power possible while maintaining the easy maintenance of a hydraulic cam.




4/7 Swap Retro-Fit Hydraulic Roller Camshafts          
Cam Part No. Cam & Lifter Set Part No. Duration
IN
Advertised
EX
Duration
IN
@.050"
EX
Valve w/1.60
IN
Lift Rockers
EX
Lobe Separation Angle Intake Centerline Valve
IN
Lash
EX
Notes
514245-10 NA 272 282 219 229 .517 .512 110 106 Hyd. Hyd. 1,4
1600-5400  Good idle, Street, broad low to mid range performance.      
514825-10 NA 278 282 225 229 .560 .555 110 106 Hyd. Hyd. 1,4
1800-5600  Fair idle, Performance Street, broad usable power range.     
514155-10 NA 286 286 233 233 .549 .549 110 106 Hyd. Hyd. 1,4
2000-5800  Choppy idle, strong low & mid range performance. 2500+ stall.     
514635-10 NA 288 294 235 241 .581 .581 110 106 Hyd. Hyd. 1,4
2200-6600  Rough idle, strong mid-range torque & horsepower.      
519995 NA Custom Grind Camshaft
Retro-Fit Hydraulic Roller Special Order Camshaft.       
Hyd. Hyd. 1,4

4-Oldsmobile-39°-V8-1967-1990-MFTC-HRC 510021
cam recommendation_btnAll Howards™ Cams use the highest-grade race quality cores available. All hydraulic and mechanical flat tappet camshafts are 100% Rockwell checked and Parkerized to ensure the highest quality control standards available anywhere. Howards™ Cams are manufactured on dedicated high precision cam grinding machines. Most Howards™ Cams are packaged and shipped in our unique, hard, high impact plastic reusable cases. This ensures that the high quality camshaft that went into the case comes out in the same condition, when delivered, as when it was packed.




Cam Part No. Cam & Lifter Set Part No. Duration
IN
Advertised
EX
Duration
IN
@.050"
EX
Valve w/1.60
IN
Lift Rockers
EX
Lobe Separation Angle Intake Centerline Valve
IN
Lash
EX
Notes
519992 NA Custom Grind Camshaft
Mechanical Flat Tappet Special Order Camshaft.         
1

5-Oldsmobile-39°-V8-1967-1990-Mechanical-Roller-Camshafts-HRC 51XXX5
cam recommendation_btnAll Howards mechanical roller cams are made from premium billet steel. Mechanical roller cams are designed and mainly used in full competition applications. Real race conditions are extremely punishing to the valvetrain and the camshaft. So why would you use a cast core? No matter how good the heat-treatment, a cast core (SADI) will not provide the performance or durability of an American steel billet cam. At Howards Cams we will not skimp on materials for higher profits.




Cam Part No. Cam & Lifter Set Part No. Duration
IN
Advertised
EX
Duration
IN
@.050"
EX
Valve w/1.60
IN
Lift Rockers
EX
Lobe Separation Angle Intake Centerline Valve
IN
Lash
EX
Notes
519993 NA Custom Grind Camshaft
Mechanical Roller Special Order Camshaft.         
1,5
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T: (920)2335228
F: (920)2321572
Email: info@howardscams.com
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