Engine >> ENGINE BALANCING

Engine >> ENGINE BALANCING

Engine Balancing

The AERA Technical Committee offers the following engine balancing information gathered over the years from various sources within the automotive industry. This TB will be updated as we receive new information as to additions. Every effort was made prior to printing to make this TB as useful as possible. Your input is greatly appreciated and if you have anything to add or comment on please fax to AERA toll free at 888-329-2372, attention Technical Dept.

Note: See legend for additional information.

Manufacturer Engine Cubic Liters Throw Recip Rotating Legend
Type Inches Angle % %

AJS 1 cyl 61% 100% 3, 19
AMC V-8 290 -> 304 4.7L -> 5.0L 90° 51% 100% 17
Audi L 5 cyl EXT
Benelli 6 cyl 3,18,19
BMW Opposed street 60% 100% 3, 19
BMW Opposed race 50% 100% 3, 19
Briggs 1 cyl race 67% 100% 21
Briggs 1cyl stock 50% 100% 21
Brush 1 cyl 50% 100%
BSA L-2 cyl 650 cc 75-80% 100% 19
BSA 1 cyl 61% 100% 19
BSA L-2 cyl street 60-70% 100% 19
BSA L-2 cyl race 50% 100% 19
BSA L-3 cyl 50% 100% 19
Buick V-6 181 3.0L 90° 36.6% 100% EXT
Buick V-6 196 3.2L 90° 36.6% 100% EXT
Buick V-6 race 196 3.2L 90° 50% 100% EXT
Buick V-6 225 3.7L 90° EXT
Buick V-6 231 3.8L 90° 36.6% 100% EXT
Buick V-6 race 231 3.8L 90° 50% 100% EXT
Buick V-6 252 4.1L 90° EXT
Buick V-8 322 ->455 90° 50% 100% EXT
Cadillac V-8 252 4.1L 90° 50% 100% EXT
Cadillac V-8 350 5.7L 90° 50% 100% 24
Cadillac V-12 368 6.0L 60° INT
Capri V-6 171 2.8L 60° 50% 100% 4, 22
Capri V-6 231 3.8L 90° 39% 100% EXT
Chevy L-6 140 2.3L 6
Chevy V-6 173, 191&207 2.8, 3.1 &3.4L 60° 50% 100% EXT
Chevy V-6 200 3.3L 60° 46% 100% INT
Chevy V-6 229 3.8L 46% 100% INT
Chevy V-6 262 4.3LSplit pin 90° 40% 100% INT
Chevy V-6 race 262 4.3LSplit pin 90° 50% 100% 25
Chevy V-6 262 Odd fire 90° 50% 100% EXT
Chevy V-6 262 4.3L 90° 50% 100% 26
Chevy V-6 262 4.3L 90° 40% 100% 27
Chevy V-6 262 4.3L 90° 50% 100% EXT
Chevy V-6 305->478 5.0L->7.8L 60° 50% 100% EXT
Chevy V-8 265->350 Sm Blk 90° 50% 100% INT
Chevy V-8 305->350 Sm Blk 90° 50% 100% 25
Chevy V-8 379->397 Diesel 6.2->6.5L 90° 50% 100% 45
Chevy V-8 400 Sm Blk 6.6L 90° 50% 100% 7
Chevy V-8 396->502 Big Blk 90° 50% 100% 5&42
Chrysler V-6 201&231 3.3L&3.8L 90° 50% 100% INT
Chrysler V-6 238 3.9L 90° 50% 100%
Chrysler V-8 273->318 90° 50% 100 23&73+22
Chrysler V-8 340 Sm Blk 90° 50% 100% 12&15 Chrysler V-8 360 Sm Blk 90° 50% 100% 12
Chrysler V-8 361->440 BB 90° 50% 100% 8&12
Chrysler V-10 488 8.0L 90° 50% 100%
DDC V-53 318 5.2L 200% 200% 1
DDC V-71 426 7.0L 200% 200% 1
DDC V-92 552 9.0L 200% 200% 1
Evinrude V-6 156 2.6L 50% 100% 2&28
Ferrari V-12 60° 50% 100%
Ferrari V-6 2.7L 60° 18
Ferrari GST V-6 Dino 56° 50% 100%
Fiat V-12 2.4L 60° 18
Ford L-3 cyl Zero 100%
Ford V-4 104 1.7L 60° 50% 100%
Ford V-6 153 2.5L 60° 50% 100% Ford V-6 171 2.8L 60° 50% 100% EXT
Ford V-6 177 2.9L 60° 50% 100% INT
Ford V-6 183 3.0L 50% 100% INT
Ford V-6 SHO 182 3.2L 50% 20
Ford V-6 SHO 207 3.4L 50% 20
Ford V-6 231 3.8L 90° 39.4% 100% 44/EXT
Ford V-6 231 3.8L 90° 50% 100% 10
Ford V-8 221->351W Sm Blk 90° 50% 100% 22
Ford V-8 332->428 Big Blk FE 90° 50% 100% 14&29
Ford V-8 370->460 Big Blk 385 90° 50% 100% 11&14
Ford V-8 281 Mod 4.6L 90° 50% 100% INT
Ford V-8 330 Mod 5.4L 90° 50% 100% 40
Ford V-10 413 6.8L 90°
Ford V-8 475->534 7.8L&8.8L 90° 50% 100% EXT
GM V-6 191 3.1L 60° 44-46% 100% EXT
GEO L-3 61 1.0L 100% EXT
Harley&Indian V 2 street 52-56% 100% 19
Harley V 2 street hp 57% 100% 30
Harley V 2 race 66% 100% 19
Honda L-4 18
Honda V-4 50% 100% 19
Jeep V-6 225 3.7L 90° 50% 100% EXT
Kawasaki L-4 18
Kawasaki L-6 18
Koehler 1cyl 50% 100%
Lincoln V-12 50% 100% 13 Maserati V-6 2.8L 90° 50%
Mazda V-6 153 2.5L 60° 50% Mazda V-6 180 3.0L 50% 100% 40
Matchless 1cyl 61% 100% 19
Mercedes L-5 cyl 50% 100% EXT
Mercedes L-6 cyl 43
Mercury V-6 151 2.5L 30% 100% 2&16
Mercury V-6 race 151 2.5L 50% 100% 2&16
Mitsubishi V-6 181 3.0L 50% 100% 40
Moto Guzzi 2 cyl 750 cc 90° 51% 100% 19
Navistar V-8 304->392 5.0L->6.4L 90° 50% 100% EXT
Nissan V-6 168 2.8L 60° 50% 100% INT
Nissan V-6 181 3.0L 60°
Nissan V-6 181 3.0L 50% 100% 39
Norton V-2 str 60-70%100% 19
Oldsmobile V-8 307->455 5.0L-.7.5L 90° 50% 100% EXT
Perkins L-3 0% 50% EXT
Peugeot V-6 50% 100% INT
Pontiac V-8 326->455 5.4L&7.5L 90° 50% 100% 9, EXT
Renault V-6 50% 100% INT
Saab V-4 104 1.7L 50% 100%
Suzuki L-4 18
Tecumseh 1cyl 50% 100% 35
Tecumseh 1 cyl 60% 100% 36
Tecumseh 1 cyl 70% 100% 37
Tecumseh 2 cyl 81% 100% 38
Triumph 1 cyl 61% 100% 19
Triumph L-2 street 60-70% 100% 19
Triumph L-2 race 50% 100% 19
Triumph L-3 cyl 50% 100% 19
Volvo V-4 50% 100% INT
Volvo V-6 50% 100%
V W V-6 VR6 170 2.8L 18° 30% 100% 34
Yamaha 1 cyl 61% 100% 19
Yamaha V-2 75° 55-60% 100% 19
Yamaha V-2 75° 60-65% 100% 19
Yamaha L- 3 cyl 50% 100% 19
Yamaha L-4 cyl 17, 19
Yamaha V-6 30% 100% 31
Yamaha V-6 race 50% 100% 31
Wisconsin 4 cyl 108 1.8L 90° 36% 100% 32
Wisconsin 4 cyl 154 2.5L 90° 20% 100% 33

1. See AERA TB 135R for DDC complete information.
2. Marine
3. OEM specs.
4. German made version of Ford engines.
5. External balance on 454 + 502 cu" engines
6. Includes Corvair opposed flat six cylinders.
7. External 400 cu" engine.
8. 440-6 Pack external
9. Externally balance on the flywheel end of engine only.
10. Super Coupe internal balance steel crankshaft and also Windstar Van
11. 1979 and up is external uses a slide on counter weight behind the dampner.
12. External balance counter weight welded on the torque converter.
13. H series 1941
14. Steel 427 and 429 Boss cu" cranks with oil galleys in hollow rod pins add 15 grams. If not hollow rod pins use 4 grams.
15. Cast crank only is external
16. Requires serious amount of heavy metal to correct out of balance condition.
17. External from 1967 and up and some 290 mid year 1966
18. No bobweights required.
19. Motorcycle
20. Internal, use one rotating rod weight.
21. Mini bobweights
22. External balanced
23. Internal balanced
24. Internal 1942-46 L head
25. External balance flywheel end all with one piece RMB seal.
26. External with balance shaft
27. External with out balance shaft
28. XP Marine engine
29. External balance on 410/428 cu" engines.
30. 3000-4000 RPM operating range
31. 200 HP outboard
32. VH-4D
33. VG-4D
34. VR-6
35. Garden tractor
36. Go-cart
37. Operating range 7500-10,000 RPM
38. Operating range 10,000 RPM
39. VG-30
40. SOHC
41. DOHC
42. 427 HD tall block truck external
43. Some 6 cylinders no balance is performed on the crankshaft all corrections are made on the flywheel and damper.
44. Truck and Lincoln require 39.4% rec. and 100% rotating, plus an additional 3.0 oz.-in at the damper end of the crankshaft. The weight is added right at the centerline of the counter weight at the damper.
45. Heavy metal required on each end to put in balance.
The AERA Technical Committee

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