Engine Blueprint Specifications: 1977 Pontiac 200 HP 400 V8
PONT-77
Issued: 5/20/1977
Last Revised: 6/7/2022
Revisions: 25 July 1980, 27 Aug 1987, 21 Nov 1994, 1-5-96, 5-23-96, 4-3-97, 4-29-97, 1-20-2004, 4-14-06 WR, 2-6-08 WR, 2/3/11 PC, 01-01-2021, 6/7/2022
Engine Family: General Motors, Pont V8 Late
Advertised Comp Ratio: 9.08:1
Induction: 1-4 Bbl
Engine Type: V8
Basic Specs: | Bore | Stroke | Main Journal Dia | Rod Journal Dia | Max Bore | Max Stroke | Max Displacement |
| 4.125" | 3.750" | 3.000" | 2.250" | 4.205" | 3.765" | 418.3 ci |
Piston-Rod Specs: | Piston Weight | Comp Height | Pin Weight | Rings | Rings Weight | Rod C/C | Max Rod C/C | Rod Weight | Min Assy Weight |
| 551 g | 1.695" | 90 g | 5/64, 5/64, 3/16 | 57 g | 6.625" | 6.650" | 760 g | 1458 g |
Compression: | Deck Height | Head Gasket | Piston Type | Dome/Dish Vol | Dome/Dish Hgt | Comb Chamber Vol | Max Compression |
| .004" AB | .043" | Flat w/notches | 0 cc | 0 | 89.06 cc | 9.75:1 |
Valve Train: | Int Rocker Ratio | Exh Rocker Ratio | Intake Valve | Exhaust Valve | Lifter Type | Spring Type | Lifter Dia. |
| 1.50:1 | 1.50:1 | 2.113" | 1.663" | Hyd | Outer & inner | 0.842" |
Camshaft: | Intake Lift | Exhaust Lift | |
| .364" | .407" | |
Intake Manifolds: | Casting No. | |
| 100003395 | Cast Iron |
| 525355 | Cast Iron |
Carburetors: | Number | Manufacturer | Trans | Type | Primary Throttle | Secondary Throttle | Primary Venturi | Secondary Venturi | |
| 17057263 | Rochester | SM | 4-Bbl | 1.375" | 2.250" | 1.218" | .000" | Air valve secondary |
| 17057266 | Rochester | Auto | 4-Bbl | 1.375" | 2.250" | 1.218" | .000" | Air valve secondary |
| 1903 | Edelbrock | ALL | 4-Bbl | 1.375" | 2.250" | 1.233" | .000" | AV Secondary. Replacement for GM large venturi Quadrajet. NOTE: Venturi specs include .015" maximum allowable tolerance. |
Notes: | | |
| Engine | Auto only in Can Am |
Power Factors: | Stock Man | | Stock Auto | | S/S Man | | S/S Auto | | GT Man | | GT Auto | | GTFwd Man | | GTFwd Auto | |
Base Factors | 290 | 10/16/06 | 290 | 10/16/06 | 285 | 1/1/07 | 285 | 1/1/07 | 285 | | 289 | 1/1/07 | 285 | | 289 | 1/1/07 |
Accepted Replacement Pistons for Stock Eliminator
Effective 1/9/2023
Specs:
Comp Hgt-1.695"
Pin Dia-0.980"
Rings-5/64, 5/64, 3/16
Distance to Top Ring-0.320"
Piston Min Weight-551g
Accepted Replacement Oil Pans for Stock Eliminator
Engine Group - Pont V8 Late
Effective 5/10/2022
Accepted Replacement Blocks
Accepted Replacement Connecting Rods for Stock or S/S
Effective 8/23/2023
Specs:
C/C Length- 6.625"
Min Weight- 760g
Journal Dia- 2.249"
Big End Dia- 2.375"
Pin Dia- 0.980"
Manufacturer |
Part Number |
C/C Length |
Wgt. |
Pin Dia. |
|
|
Carrillo |
C427-76635S |
6.625" |
834g |
0.990" |
Pontiac |
|
Carrillo |
C427-A76635H |
6.625" |
787g |
0.990" |
Pontiac **Discontinued** |
|
Carrillo |
P-455-SS |
6.631" |
760g |
NA |
SUPER STOCK ONLY |
|
Childs & Albert |
389-12 |
6.625" |
NA |
0.947" |
Pontiac |
|
Crower |
F91059 |
6.625" |
NA |
0.981" |
Pontiac |
|
Crower |
ML93015B5 |
6.624" |
773g |
NA |
SUPER STOCK ONLY |
|
Crower |
SP93419 |
6.625" |
830g |
0.947" |
Pontiac |
|
Eagle |
CRS-6625P3D |
6.625" |
760g |
0.947" |
Pontiac |
|
Eagle |
CRS-6635P |
6.635" |
810g |
0.990" |
BB Chev |
|
Manley |
14168 |
6.635" |
830g |
0.990" |
BB Chev |
|
Oliver |
ORPPONT6625 |
6.625" |
NA |
0.981" |
Pontiac |
|
Oliver |
P6225PONT |
6.625" |
790g |
0.980" |
Pontiac |
|
Oliver |
P6625PONTFR8 |
6.625" |
819g |
0.980" |
Pontiac |
|