EngineSpecs

Expanded Blueprint Specs:

The first thing you will notice is a whole lot more data than you get from the NHRA Tech Bulletins pages. That is why individual engines are shown rather than every available engine for the year-make.
The additional data that is not included on the NHRA Tech Bulletins pages is not authorized or approved by NHRA so do not assume that this has the same authority in those areas as the information on the official NHRA Technical Bulletins. The data from the NHRA web Technical Bulletins is included here and every effort is made to ensure that this data is the most up to date information published by NHRA.
An interesting tool is the link on the right side of the page to show all the cars that use the engine you have selected. You will find that information valuable in considering options for class placement for this engine.
You will find all the relavent information from NHRA for accepted replacement parts - pistons, rods, oil pans, etc. - is all located in this one page. You do not have to look anywhere else to find that information.

Engine Blueprint Specifications: 1981 Pontiac 200 HP 301 V8

PONT-81 Issued: 7/25/1981 Last Revised: 10/10/2022 Revisions: 2-16-98, 4-27-98, 7-1-99, 11-29-00, 2-6-08 WR, 1-12-2021, 10/10/2022

Engine Family: General Motors, Pont V8 Late Advertised Comp Ratio: 8.44:1 Induction: 1-4 Bbl w/Turbo Engine Type: V8

Basic Specs:	Bore	Stroke	Main Journal Dia	Rod Journal Dia	Max Bore	Max Stroke	Max Displacement
	4.002"	3.010"	3.000"	2.000"	4.082"	3.025"	316.7 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
	637 g	1.565"	80 g	5/64, 5/64, 3/16	54 g	6.050"	6.075"	606 g	1377 g

Compression:	Deck Height	Head Gasket	Piston Type	Dome/Dish Vol	Dome/Dish Hgt	Comb Chamber Vol	Max Compression
	.018" AB	.035"	Dished	-11.40 cc	-0.300"	67.47 cc	8.6:1

Valve Train:	Int Rocker Ratio	Exh Rocker Ratio	Intake Valve	Exhaust Valve	Lifter Type	Spring Type	Lifter Dia.
	1.50:1	1.50:1	1.720"	1.500"	Hyd	Outer only	0.842"

Camshaft:	Intake Lift	Exhaust Lift
	.373"	.373"

Cylinder Heads:	Casting No.		Intake Volume	Exhaust Volume
	10014006
	10017504

Intake Manifolds:	Casting No.
	10013114	Cast Iron

Carburetors:	Number	Manufacturer	Trans	Type	Primary Throttle	Secondary Throttle	Primary Venturi	Secondary Venturi
	17081274	Rochester	Auto	4-Bbl	1.375"	2.250"	1.218"	.000"	Air valve secondary
	1903	Edelbrock	Auto	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:
	Class Limits	Available with Automatic transmission only

Power Factors:	Stock Auto		S/S Auto		GT Auto		GTFwd Auto
Base Factors	233	11/10/15	220		220		220

Accepted Replacement Pistons for Stock Eliminator

   Effective 1/9/2023
Specs:     Comp Hgt-1.565"    Pin Dia-0.927"    Rings-5/64, 5/64, 3/16
Distance to Top Ring-0.290"    Piston Min Weight-637g

Manufacturer	Part Number

Ross

73026

Note the calculations for actual displacement the maximum actual compression ratio.

Would you like to see a list of all the cars where this engine is used? Click here: