PONTIAC4 Cylinder |
Parts IndexParts Combination 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. Continue to the parts lists to find the parts that fit your level.Camshaft and lifter kits. Valve Train includes pushrod sets, rocker arm sets, timing sets, valve spring sets, valves, and everything for assembling your heads. Engine Bottom End includes engine overhaul kits, oil pumps, piston sets, ring sets, and misc. parts for assembling your short block. |
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For Reference only: Valve Train | Engine Bottom End 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 Car (idle to 3600 rpm, max. HP @ 4600 rpm)
Good fuel economy and improved low-end for city use. Recalibrate your
stock fuel system. No other modifications are required.
Engine: Cam Range*
151 up to 19600
*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
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 and improved mid-range performance for every day use.
No internal engine modifications are required.
Engine: Cam Range* Air/Fuel Range: Horsepower:
151 19600 to 20400 222 to 278 cfm Max. 121 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 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.
Engine: Cam Range* Air/Fuel Range: Horsepower:
151 20400 to 21200 250 to 309 cfm Max. 136 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 perf. 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.
Engine: Cam Range* Air/Fuel Range: Horsepower:
151 21200 to 22000 278 to 341 cfm Max. 151 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: 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 for street machines. Multi-angle valve
grind is recommended.
Engine: Cam Range* Air/Fuel Range: Horsepower:
151 22000 to 22800 308 to 373 cfm Max. 166 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: Performance 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:
151 22800 to 23600 338 to 405 cfm Max. 181 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 13.0:1
Exhaust: Performance 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:
151 23600 and up 369 cfm and up 181 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: Performance 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?
151 gets the best flow past the valves at only .440 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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For Reference only: Valve Train | Engine Bottom End www.amotion.com | Catalogue | Cam Checking | Tech Pages
Accelerated Motion
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Hydraulic Cam and Lifter Kit 1979-84 with cross flow head
Also AMC/Jeep w/GM 151(2.5) 4 Cyl. 1980-83
Compare .050 Dur V.Lift Adv Dur Sep Accelerated Motion #
1979-86 Hydraulic Lifter Set HT2077*8 ***
All kits include computer cam checking:
Stock 190/190 .406/.406 276/276 112 76441-18841
190/190 .464/.464 253/253 112 76441-18846
190/202 .464/.474 253/261 112 76441-19264
192/202 .474/.474 252/261 112 76441-19380
198/200 .478/.481 263/280 111 76441-19814
205/213 .476/.470 267/277 111 76441-20614
Turbo and/or Propane 76441-20680
213/205 .470/.476 277/267 114 76441-20680
213/213 .470/.470 277/277 112 76441-21147
214/224 .516/.543 280/290 112 76441-21585
Turbo and/or Propane 76441-21720
224/214 .543/.516 290/280 114 76441-21720
Turbo and/or Propane 76441-21951
226/217 .518/.515 292/277 114 76441-21951
217/226 .515/.518 277/292 111 76441-21952
225/225 .535/.535 277/277 112 76441-22354
Hydraulic Roller Cam and Lifter Kit 1984-93
Five types of hydraulic roller cam engines were produced and the
cams are not interchangeable. Check the 8th position of your
vehicle identification number or measure the cam snout to be sure
of which engine you have.
Hydraulic Roller Cam and Lifter Kit 1984-93
VIN 2, A, E, or R. Snout is 1.0 long. Gear drive.
Buick Century to 1990.
All Chevrolet, including Camaro to 1990.
Chevrolet S10/S15 Trucks to 1993.
Oldsmobile Cutlass to 1990.
Pontiac 6000 and Firebird to 1990.
Pontiac Fiero to 1988 except chain driven cam.
Compare .050 Dur V.Lift Adv Dur Sep Accelerated Motion #
1984-93 Hydraulic Roller Lifter Set HT2148*8 ***
All kits include computer cam checking:
Stock 1984-91 76448-18840
190/190 .404/.404 276/276 112 76448-18840
Stock Cars 1990, S10/S15 Trucks 1991-93 76448-19144
193/193 .434/.434 273/277 112 76448-19144
204/204 .469/.469 262/262 112 76448-20247
Propane and/or Turbo 76448-20315
208/204 .487/.469 277/262 114 76448-20315
204/214 .469/.478 262/277 112 76448-20580
Propane and/or Turbo 76448-20582
210/208 .489/.487 277/277 114 76448-20582
207/208 .503/.513 268/268 112 76448-20584
208/210 .487/.489 277/277 112 76448-20715
208/214 .487/.478 277/277 112 76448-20848
210/210 .489/.489 277/277 112 76448-20849
211/211 .539/.539 267/267 112 76448-20954
214/214 .478/.478 277/277 112 76448-21248
Turbo 220/211 .549/.539 292/267 114 76448-21355
211/220 .539/.549 267/292 110 76448-21454
220/220 .549/.549 292/292 112 76448-21854
225/225 .541/.541 291/291 112 76448-22354
Hydraulic Roller Cam and Lifter Kit 1985-89
VIN U. Snout is .860 long. Gear drive.
Buick Skylark and Somerset to 1989.
Oldsmobile Calais to 1989.
Pontiac Grand Am to 1989.
Compare .050 Dur V.Lift Adv Dur Sep Accelerated Motion #
1985-89 Hydraulic Roller Lifter Set HT2148*8 ***
All kits include computer cam checking:
Stock 190/190 .404/.404 276/276 112 76458-18840
204/204 .469/.469 262/262 112 76458-20247
Propane and/or Turbo 76458-20315
208/204 .487/.469 277/262 114 76458-20315
204/214 .469/.478 262/277 112 76458-20580
Propane and/or Turbo 76458-20582
210/208 .489/.487 277/277 114 76458-20582
207/208 .503/.513 268/268 112 76458-20584
208/210 .487/.489 277/277 112 76458-20715
208/214 .487/.478 277/277 112 76458-20848
210/210 .489/.489 277/277 112 76458-20849
211/211 .539/.539 267/267 112 76458-20954
214/214 .478/.478 277/277 112 76458-21248
Turbo 220/211 .549/.539 292/267 114 76458-21355
211/220 .539/.549 267/292 110 76458-21454
220/220 .549/.549 292/292 112 76458-21854
225/225 .541/.541 291/291 112 76458-22354
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For Reference only: Valve Train | Engine Bottom End www.amotion.com | Catalogue | Cam Checking | Tech Pages
Accelerated Motion
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CAM KEY
Advance or retard your cam to suit your need.
2 degree short Mr. Gasket 987
4 degree short Mr. Gasket 988
CAM LUBE
3 oz. Tube, Paste Bel-Ray Anti-Seize
4 oz. Bottle, LL-5 Liquid Sealed Power 55-400
LIFTER SET
1977-79 Hydraulic Sealed Power HT969*8
1977-84 Hydraulic high rev Speed Pro HT969R*8
1979-84 Hydraulic Sealed Power HT2077*8
1984-92 Hydraulic roller HT2148*8
PUSH ROD SET
1977-79 except cross flow 9.677 Sealed Power RP3180*8
1977-79 chrome moly 9.680 Speed Pro RP3214R*8
1977-79 +.124 lift 9.748 Sealed Power RP3276*8
1979-81 cross flow 8.906 Sealed Power RP3210*8
1979-81 +.123 lift 8.976 Sealed Power RP3211*8
1982-84 exc hyd roller 8.976 Sealed Power RP3211*8
1984 hydraulic roller 8.276 Sealed Power RP3263*8
1985-86 hydraulic roller 8.383 Sealed Power RP3170*8
1987-92 8.276 Sealed Power RP3263*8
ROCKER ARM SET
Stock shoulder bolt style Sealed Power R894*8
TIMING SET
1977-90 Stock gear set 1977-90 Sealed Power 221-2542S
1985-89 U Stock gear set Sealed Power 221-2544S
1990-91 3pc chain set exc. U Sealed Power KT3-378S
VALVE KEEPER SET
1977-86 Stock, 11/32 Sealed Power VK115*16
1977-86 Hardened, 11/32 Speed Pro VK115R*16
1977-86 Machined/Hardened, 11/32 Speed Pro VK315R*16
Machined/Hardened, 11/32, 3/8x7 Speed Pro VK415R*16
1984 Stock Fiero Sealed Power VK216*16
1987-92 Stock Sealed Power VK216*16
Machined/Hardened, 5/16, 11/32x7 Speed Pro VK244R*16
Machined/Hardened, 5/16, 3/8x7 Speed Pro VK444R*16
VALVE SPRING INSERT
1.250 x .875 x .030 Sealed Power 259-201B
1.250 x .875 x .060 Sealed Power 259-201A
1.360 x 1.000 x .015 Sealed Power 259-102C
1.360 x 1.000 x .030 Sealed Power 259-102B
1.360 x 1.000 x .060 Sealed Power 259-102A
Set of 8 standard inserts, mix and match
1.250 x .875 x .015 hardened Speed Pro 259-201CHP
1.360 x 1.000 x .015 hardened Speed Pro 259-102CHP
1.360 x 1.000 x .030 hardened Speed Pro 259-102BHP
1.360 x 1.000 x .060 hardened Speed Pro 259-102AHP
Set of 8 hardened inserts, mix and match
VALVE SPRING RETAINER SET
For VS739R as below Speed Pro VSR7000R*8
Chrome-Moly 1.25OD, 11/32x7+.050 Speed Pro VSR7000R*8
For VS890R as below Speed Pro VSR7001R*8
Chrome-Moly 1.44OD, 3/8x7, +.060 Speed Pro VSR7001R*8
For VS890R as below Speed Pro VSR7018R*8
Chrome-Moly 1.37OD, 11/32x7 Speed Pro VSR7018R*8
For VS741R as below Speed Pro VSR7006R*8
Chrome-Moly 1.40OD, 3/8x7, +.080 Speed Pro VSR7006R*8
VALVE SPRING SET
1977-85 stock height is 1.66
1977-85 Stock Sealed Power VS521*8
1986 Stock Sealed Power VS921*8
1987-88 Stock Sealed Power VS861*8
1989-90 Stock Sealed Power VS922*8
1991-92 Stock Sealed Power VS925*8
Performance and Race Valve Spring Selection:
Int.Dur.@.050 Seat Pressure Open Pressure
180 to 200 90 to 100 225 to 250
200 to 220 100 to 110 250 to 275
220 to 240 110 to 120 275 to 300
240 to 260 120 to 130 300 to 325
Use Valve Spring Shims to adjust height and pressure.
Performance spring lift and pressure is based on 1.66 stock
height and the variance caused by the retainer.
S Single springs
S-D Single springs with dampeners
D Dual springs
D-D Dual Springs with dampeners
Dual valve springs require cylinder head machining.
S/D 1.26OD/100#@1.71/277#@.500Lift Speed Pro VS739R*8
D 1.38OD/110#@1.72/260#@.670Lift Speed Pro VS890R*8
D 1.39OD/124#@1.66/260#@.610Lift Speed Pro VS890R*8
D 1.39OD/138#@1.74/319#@.590Lift Speed Pro VS741R*8
VALVE STEM SEAL SET (machining required)
.343v .562g .728 rubber/teflon Sealed Power ST2001*8
.343v .531g .697 rubber/teflon Sealed Power ST2003*8
.343v .531g .650 teflon Speed Pro ST2018R*8
VALVE STEM SEAL GUIDE CUTTER
For ST2001 seals Sealed Power MT2001H
For ST2003 and ST2018R seals Sealed Power MT2003H
VALVE - EXHAUST
1977-79 exc cross flow, 1.50 Sealed Power V2078
1979-86 cross flow, 1.50 x 11/32 Sealed Power V2203
1987-88, 1.50 x 8mm Sealed Power V2436
1989-92, 1.50 x 8mm Sealed Power V2529
VALVE - EXHAUST SET OF 4
1.50 x 11/32 x 4.924 (21-2N) Sealed Power V2078*4
1.50 x 11/32 x 4.619 (21-2N) Sealed Power V2203*4
1.50 x 8mm x 4.355 (21-2N) Sealed Power V2436*4
1.50 x 8mm x 4.541 (21-2N) Sealed Power V2529*4
VALVE - INTAKE
1977-79 exc cross flow, 1.72 Sealed Power V2079
1979-86 cross flow, 1.72 x 11/32 Sealed Power V2204
1987-88, 1.72 x 8mm Sealed Power V3941
1989-92, 1.72 x 8mm Sealed Power V2530
VALVE - INTAKE SET OF 4
1.72 x 11/32 x 4.924 (1047) Sealed Power V2079*4
1.72 x 11/32 x 4.669 (1041) Sealed Power V2204*4
1.72 x 8mm x 4.394 (1547) Sealed Power V3941*4
1.72 x 8mm x 4.591 (1547) Sealed Power V2530*4
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For Reference only: Valve Train | Engine Bottom End www.amotion.com | Catalogue | Cam Checking | Tech Pages
Accelerated Motion
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CAM BEARING SET
Stock (Babbit) F-M 1461M
CONNECTING ROD - RECONDITIONED
1977-84 F-M CR1455
FROST PLUG BLOCK KIT - BRASS
1977-85 Sealed Power 381-8045
1986-92 Sealed Power 381-8074
MAIN BEARING SET
1977-92 except U, 1.009 flange F-M 6689M
U, .943 flange F-M 6690M
OIL PUMP
1977-79 except cross flow Sealed Power 224-4158
1977-79 high volume Sealed Power 224-4158HV
1979-87 cross flow Sealed Power 224-41239
1979-87 cross flow, high volume Sealed Power 224-41239V
1979-87, performance high volume Speed Pro 224-111R
OIL PUMP INTERMEDIATE SHAFT Sealed Power 224-61239
PISTON SET
8.5:1 TRW Forged L2484F*4
9.1:1 TRW Forged L2485F*4
PISTON PIN BUSHING SET
RING SET (5/64-5/64-3/16)
Plain cast Sealed Power E382X
Moly cast Sealed Power E382K
Plasma moly, ductile iron Speed Pro R10511
P.Moly, ductile iron, file fit Speed Pro R10355
ROD BEARING SET F-M 4-2500RAA
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For Reference only: Valve Train | Engine Bottom End www.amotion.com | Catalogue | Cam Checking | Tech Pages
Accelerated Motion
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(C) Copyright 1996-2012 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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