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Oldsmobile V8
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Parts Selection Guide
The Accelerated Motion Parts Selection Guide uses 8 typical performance levels
from mild to wild. Choose your performance level based on your driving habits, normal rpm range,
or the horsepower that you require. If you aren't sure which range to use, be conservative.
If you choose too high an rpm range it will rarely be used and you will be disappointed but an
rpm range that is lower than you need will still be used. Each performance level suggests the range
of camshaft, carb size, compression ratio, header size, ignition, and gear ratios that will work
together the best for that performance level.
Camshaft and Lifter Kits
Precision made camshafts are fully computer analyzed before packaging and come with
a lifetime guarantee agains manufaturing defects. If you don't see the camshaft you need in the wide
selection of Accelerated Motion camshafts it can probably be custom made for you. These features
make Accelerated Motion Cam and Lifter Kits one of the best values available anywhere.
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Parts Combination Guide |
Camshaft and Lifter Kits
www.amotion.com | Catalogue | Cam Checking | Tech Pages 
Accelerated Motion
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Parts Combination GuideParts that do not match stock specs are intended only for
vehicles that do not require pollution controls.
Torque and City (idle to 3600 rpm, max. HP @ 4600 rpm)
Good fuel economy, light to medium towing and improved low-end for
city use. Recalibrate stock carb. No other internal engine
modifications required.
Engine: Cam Range*
260 up to 19547
307 up to 19630
350 w/1.88 up to 19787
350 w/2.00 up to 19667
400 w/2.00 up to 20000
400 w/2.07 up to 19930
403 up to 20020
455 w/2.00 up to 20367
455 w/2.07 up to 20297
*The cam range refers to the 2nd half of
the Accelerated Motion part number.
Compression: Gasoline 9.0:1 or less, Propane 10.5:1 or less
Exhaust: Stock or dual exhaust
Gear Ratio: 3.7:1 and lower (numerically)
Idle: 800 rpm or less
Ignition: Recurved distributor and electronic ignition
RV and Commuter (1000 rpm to 4000 rpm, max. HP @ 5000 rpm)
Good fuel economy, medium towing and improved mid-range performance
for every day use. No internal engine modifications are required.
Engine: Cam Range* Air/Fuel Range: Horsepower:
260 19547 to 20347 383 to 478 cfm Max. 208 HP
307 19630 to 20430 452 to 565 cfm Max. 246 HP
350 w/1.88 19787 to 20587 515 to 644 cfm Max. 280 HP
350 w/2.00 19667 to 20467 515 to 644 cfm Max. 280 HP
400 w/2.00 20000 to 20800 589 to 736 cfm Max. 320 HP
400 w/2.07 19930 to 20730 589 to 736 cfm Max. 320 HP
403 20020 to 20820 593 to 742 cfm Max. 322 HP
455 w/2.00 20367 to 21167 670 to 837 cfm Max. 364 HP
455 w/2.07 20297 to 21097 670 to 837 cfm Max. 364 HP
*The cam range refers to the 2nd half of
the Accelerated Motion part number.
Compression: Gasoline 9.5:1 or less, Propane 11.0:1 or less
Exhaust: Stock, dual exhaust, or small tube headers
Gear Ratio: 3.9:1 or lower (numerically)
Idle: 850 rpm or less
Ignition: Recurved distributor and electronic ignition
Mild Performance (1400 rpm to 4400 rpm, max. HP @ 5400 rpm)
Fair idle, moderate fuel economy, improved mid-range performance
and enough torque for medium/heavy towing. 4 barrel carb recommended.
Engine: Cam Range* Air/Fuel Range: Horsepower:
260 20347 to 21147 430 to 533 cfm Max. 234 HP
307 20430 to 21230 508 to 629 cfm Max. 276 HP
350 w/1.88 20587 to 21387 579 to 717 cfm Max. 315 HP
350 w/2.00 20467 to 21267 579 to 717 cfm Max. 315 HP
400 w/2.00 20800 to 21600 662 to 819 cfm Max. 360 HP
400 w/2.07 20730 to 21530 662 to 819 cfm Max. 360 HP
403 20820 to 21620 667 to 825 cfm Max. 363 HP
455 w/2.00 21167 to 21967 753 to 932 cfm Max. 410 HP
455 w/2.07 21097 to 21897 753 to 932 cfm Max. 410 HP
*The cam range refers to the 2nd half of
the Accelerated Motion part number.
Compression: Gasoline 8.5:1 to 10.0:1, Propane 10.0:1 to 11.5:1
Exhaust: Stock dual exhaust or small tube headers
Gear Ratio: 3.1:1 to 4.1:1
Idle: 900 rpm or less, slight lope
Ignition: Recurved distributor and electronic ignition
Performance (1800 rpm to 4800 rpm, max. HP @ 5800 rpm)
Good upper mid-range performance for street machines. Also works
well for medium and heavy towing. A 4 barrel carb is required.
Engine: Cam Range* Air/Fuel Range: Horsepower:
260 21147 to 21947 480 to 587 cfm Max. 260 HP
307 21230 to 22030 566 to 693 cfm Max. 307 HP
350 w/1.88 21387 to 22187 646 to 791 cfm Max. 350 HP
350 w/2.00 21267 to 22067 646 to 791 cfm Max. 350 HP
400 w/2.00 21600 to 22400 738 to 903 cfm Max. 400 HP
400 w/2.07 21530 to 22330 738 to 903 cfm Max. 400 HP
403 21620 to 22420 744 to 910 cfm Max. 403 HP
455 w/2.00 21967 to 22767 840 to 1028 cfm Max. 455 HP
455 w/2.07 21897 to 22697 840 to 1028 cfm Max. 455 HP
*The cam range refers to the 2nd half of
the Accelerated Motion part number.
Compression: Gasoline 9.0:1 to 10.5:1, Propane 10.5:1 to 12.0:1
Exhaust: Dual 2.25, headers are recommended
Gear Ratio: 3.3:1 to 4.3:1
Idle: 950 rpm or less, small lope
Ignition: Recurved or perf. distributor, electronic ignition
Hot Performance (2200 rpm to 5200 rpm, max. HP @ 6200 rpm)
Strong upper rpm performance. Not for towing.
Multi-angle valve grind is recommended.
Engine: Cam Range* Air/Fuel Range: Horsepower:
260 21947 to 22747 531 to 642 cfm Max. 286 HP
307 22030 to 22830 626 to 758 cfm Max. 338 HP
350 w/1.88 22187 to 22987 714 to 864 cfm Max. 385 HP
350 w/2.00 22067 to 22867 714 to 864 cfm Max. 385 HP
400 w/2.00 22400 to 23200 816 to 988 cfm Max. 440 HP
400 w/2.07 22330 to 23130 816 to 988 cfm Max. 440 HP
403 22420 to 23220 822 to 995 cfm Max. 443 HP
455 w/2.00 22767 to 23567 928 to 1124 cfm Max. 501 HP
455 w/2.07 22697 to 23497 928 to 1124 cfm Max. 501 HP
*The cam range refers to the 2nd half of
the Accelerated Motion part number.
Compression: Gasoline 9.5:1 to 11.0:1, Propane 11.0:1 to 12.5:1
Exhaust: Dual exhaust with headers
Gear Ratio: 3.5:1 to 4.5:1
Idle: 1000 rpm or less, has a lope
Ignition: Recurved or perf. distributor, electronic ignition
Street/Strip (2600 rpm to 5600 rpm, max. HP @ 6600 rpm)
Strong performance above 2500 rpm. Expect low manifold vacuum.
Mild port work and multi-angle valve grind are recommended.
Automatic transmissions may require a high stall torque converter.
Engine: Cam Range* Air/Fuel Range: Horsepower:
260 22747 to 23547 583 to 697 cfm Max. 312 HP
307 22830 to 23630 688 to 823 cfm Max. 368 HP
350 w/1.88 22987 to 23787 784 to 938 cfm Max. 420 HP
350 w/2.00 22867 to 23667 784 to 938 cfm Max. 420 HP
400 w/2.00 23200 to 24000 896 to 1072 cfm Max. 480 HP
400 w/2.07 23130 to 23930 896 to 1072 cfm Max. 480 HP
403 23220 to 24020 903 to 1080 cfm Max. 484 HP
455 w/2.00 23567 to 24367 1019 to 1220 cfm Max. 546 HP
455 w/2.07 23497 to 24297 1019 to 1220 cfm Max. 546 HP
*The cam range refers to the 2nd half of
the Accelerated Motion part number.
Compression: Gasoline 10.0:1 to 11.5:1, Propane 11.5:1 to 13:1
Exhaust: Dual exhaust with headers
Gear Ratio: 3.7:1 to 4.7:1
Idle: 1100 or less, has a lope
Ignition: Performance distributor and electronic ignition
Pro Street and Race (3000 rpm and up)
Super top-end performance. Manifold vacuum might be too low for
power brakes and automatic transmission modulators. Mild port work
and multi-angle valve grind are recommended. NOT for daily driving.
Automatic transmissions will require a high stall torque converter.
Engine: Cam Range* Air/Fuel Range: Horsepower:
260 23547 and up 636 cfm and up 312 HP and up
307 23630 and up 751 cfm and up 368 HP and up
350 w/1.88 23787 and up 856 cfm and up 420 HP and up
350 w/2.00 23667 and up 856 cfm and up 420 HP and up
400 w/2.00 24000 and up 978 cfm and up 480 HP and up
400 w/2.07 23930 and up 978 cfm and up 480 HP and up
403 24020 and up 985 cfm and up 484 HP and up
455 w/2.00 24367 and up 1113 cfm and up 546 HP and up
455 w/2.07 24297 and up 1113 cfm and up 546 HP and up
*The cam range refers to the 2nd half of
the Accelerated Motion part number.
Compression: Gasoline 10.5:1 and up, Propane 12.0:1 and up
Exhaust: Dual exhaust with headers
Gear Ratio: 3.9:1 and higher (numerically)
Idle: 1100 rpm or more, will be rough
Ignition: Performance distributor and electronic ignition
Which Cam Duration In The Range Will Work Best?
Cars (large): Use short or medium duration, exhaust can be longer.
Cars (small): Use long intake duration, exhaust can be longer.
Propane: Use short or medium duration, exhaust can be shorter.
Trucks: Use short duration for intake and exhaust.
Turbos: Use short or medium duration, exhaust can be shorter,
compression must be lower than shown.
How Much Lift Is Enough?
260 with 1.520 valves gets the best flow at only .390 lift.
307 with 1.750 valves gets the best flow at only .448 lift.
All with 2.000 valves get the best flow at .510 lift.
All with 2.070 valves get the best flow at .528 lift.
Lifts higher than these figures will add more duration at the maximum
flow point. Excessive lifts will cause more problems than they are
worth in an engine that is not fully race prepared.
Minimum Engine Horsepower Required To Reach A 1/4 Mile Speed:
HPq = (0.00426 x MPH) x (0.00426 x MPH) x (0.00426 x MPH) x Weight
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Top of Page |
Parts Index |
Parts Combination Guide |
Camshafts |
Engine Parts
www.amotion.com | Catalogue | Cam Checking | Tech Pages
Accelerated Motion
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Hydraulic Cam and Lifter Kits
All cam and lifter kits include computer cam checking.
Compare .050 Dur V.Lift Adv Dur Sep Accelerated Motion #
260 Stock 180/187 .395/.400 256/277 107 69861-18573
307-403 Stock 69861-19273
187/200 .400/.400 277/291 109 69861-19273
307-455 Stock 69861-20044
196/208 .440/.442 272/294 110 69861-20044
307-403 Performer type 69861-20378
204/214 .450/.474 280/289 114 69861-20378
MaxVelocity type 69861-20578
204/214 .450/.474 280/289 112 69861-20578
205/213 .448/.451 272/282 110 69861-20811
205/214 .448/.473 272/281 110 69861-20845
205/213 .448/.451 272/282 108 69861-21011
215/215 .455/.455 271/271 111 69861-21446
425-455 Performer type 69861-21581
214/224 .474/.498 289/300 112 69861-21581
Performer RPM type 69861-22583
224/234 .496/.520 290/300 112 69861-22583
390hp W31 232/232 .474/.474 329/329 113 69861-22947
234/244 .520/.542 304/316 112 69861-23585
390hp W30 244/244 .475/.475 320/320 110 69861-24448
LIFTER SET
1968-69 Hydraulic Lifter Set - .842 OD HT951*16
1970-85 Hydraulic Lifter Set HT951*16
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Top of Page |
Parts Index |
Parts Combination Guide |
Camshafts |
Engine Parts
www.amotion.com | Catalogue | Cam Checking | Tech Pages
Accelerated Motion
|
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(C) Copyright 1996-2011 by Doug Friesen, doug@amotion.com. All rights reserved. The Accelerated Motion name and logo is a registered trademark of Doug Friesen. All other marks, names and part numbers are the property of their respective owners and are used for the sole purpose of promoting sales and proper use of their products. The information contained at this site is accurate to the best of my abilities and is subject to change without notice. 
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