Buick Holden V6 3 8 Engine Performance Bible Manual

- HPBooks

H n W TO HOTBOD YOUR

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Details modifications to cylinder heads, blocks & cranksbh.

How to prepare (li set up Make, ignition (B oiling systems.

T d m k d &ta 81 bluiepri'ntingldetails. Cornprehenskre Heawy-Duty Parts list.

Go in style with Genuin e Buick Sports-

Go stylebest withmaterials Genuineand Buick Sportswear.inThe workma nwear.

The materials and workmanship go intobest these exclusive designs.

Most ship Into these Most itemsgo feature the exclusive new logodesigns. symbolizing items the new symbolizing .. .thelogo heart of Buick's Buick'sfeature V6 engine ..the heart of Buick's Bulck' s V6 engine.effort. high performance This logo will be high performance effort. Thisglogo will be appearing on an increasin number of appearing an "Buick increasing number of race cars: iton says Powered."

And race it says "Buick And Buick cars: cars are proving to Powered:' be the ones to Buick cars proving be the ones to watch in are more andto more racing watch in more and more racing environments. environments.

1,2, V-neck Sweaters: Classic V-neck In soft orlan in tan navy.Sweaters: Direct embroidered logo.In3,soft Light Lin ed 1,2, or V-neck Classic V-neck orlon In Jacket: FinelyDirect deta iled casua l jacket in 3, ta nLight withUned navy tan or navy. embroldered loga trim andFinely lining. embrocasual ideredjacket logo. In tan with navy Jacket: detailed

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trim and lining, embroidered log?

6 , Golf Shirt: Navy. 4-button. 50/50 cotton/poly jersey.

7, lo :Shirt: ColorNavy, accent knit co50150 llar. white kn it w/pocket.

6, Po Golf 4-button. cottonlpoly jersey.

8, Pblo: Racing Jacket: Tri-color. fully lined a ntron nylon with 7, Color accent knit collar. white knit wlpocket. motorspo rts logoTricolor, embroidered.

4 RoclngJacket: fully linedantron nylon with

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durable leather; miniature logo label.

9 , Indy T-Shirt: 100% cotton heavyweight tee with Buick Motorsports logocotton o n leftheavyweight chest and large 9, lndy T-Shlrt: 100% tee Indy with graphic on rear. 10, Vintage T-Shirt: Bulck Motorsports logo on left chestSmall and Buick largelogo lndy on left c on hestrear. a nd10 large vintag e Buick rear. graphic , Vintage T-shirt: Small Bulck logo

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4 , Insulated Jacket: Fully insulated cotton/poly winter weight withJacket: combination zippered securitywinter and 4, Insulated Fully Insulated cottonlpoly hand warmer pockets. 5, Leather Jacket: Supple, weight wlth combination zippered security and durable leather; miniature logo label.

5, leather Jacket: Supple, hand warmer pockets.

n, Navy Cap: Pinwale cordu roy with Buick logo direct embroidered.

12, Tan Cap: Tan with poly/cotton baseball ll, Navy Cap:Pirrwaie corduroy Bulck logo direct 13, White Poly/cotton visor with cap, adjusta ble embroldered. ll,Tan Cap:Visor: Tan polylcatton baseball terryc loth lining, 13, red/navy logo.Pbly/cottonvlsor wlth White Visor: caR adjustable terrycloth lining, redlnavy logn

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HOW TO HOTROD HOTROD YOUR

Look Look for the Buick Buick V6 logo logo to take on on inincreasing creasing significance significance with with performance performance engine engine builders. builders. This This \\arrow" "arrow" is on on target because because it symbolizes symbolizes today's performperformance engine engine ... . . , the tbe Buick V6.

V6

Publisher: Publisher: Rick Bailey; Bailey; Executive Executive Editor: Editor: Randy Summerlin Summerlin Editorial Director: Director: Tom Monroe, Monroe, P.E., P.E., S.A.E. S.A.E. Senior Editor: Editor: Ron Sessions, Sessions, A.S.A.E.; A.S.A.E.;Art Director: Director: Don Burton Coordinator: Cindy Cindy J. Coatsworth Production Coordinator: Director of Manufacturing: Manufacturing: Anthony B. Narducci

Published by HPBooks Published A Division of o f HPBooks, Inc. Inc. P.O. Box 5367, 5367, Tucson, Tucson, AZ 85703 85703 602/888-2150 6021888-2150 P.O. 0-89586-514-9 Library of Congress Congress Catalog Number 86-45964 86-45964 ISBN 0-89586-514-9 Š1986 Inc. Printed in U.S.A. 01986 HPBooks, HPBooks, Inc. U.S.A. 1st 1st Printing NOTICE: The information information contained in this book is true and complete to the best of our NOTICE: knowledge.

AU recommendations recommendationson parts and procedures are are made made without any any guarantees guaranteeson knowledge.All HPBooks. Because Because the procedures and methods methods are beyond the part of Buick Motor Division or HPBooks. our control, control, Buick and publisher disclaim all liability incurred in connection with the use of this information. information.

Buick Power Source 1I

Introduction ..................... l Introduction I Building a HighBuilding a HighPerformance V6 .............. 4 Competitive Combinations V6 4 Performance USAC Turbocharged Indy

..................... ..............

Competitive Trans Am Combinations USAC Turbocharged Indy Race Normally Aspirated Drag Trans Am Turbocharged Drag Race Normally Aspirated Drag Race Turbocharged Road Race Turbocharged Drag Race Normally Aspirated Circle Track Turbocharged Road Race (N ASCAR Sportsman) Normally Aspirated Circle Track (NASCAR Sportsman)

Cylinder Blocks ............. 42 Heavy-Duty Blocks Cylinder Blocks 42 Preparation

.............

Heavy-Duty Checklist Preparation Blocks Preparation Cleaning Preparation Assembly Checklist Cleaning Assembly

Cylinder Heads .............. 54 Production andHeads Stage I Heads Cylinder 54 Production and Stage I Cylinder

..............

Production and Stage I Heads Head Porting Production and Stage I Cylinder Stage II Iron Heads Head Porting Stage II Aluminum Heads Stage Heads Stage I1 II Iron Cylinder Head Porting Stage Aluminum Heads Valve I1 Seat Modifications Stage I1 Cylinder Head Cylinder Head Studs Porting Valve Modifications RockerSeat Covers Cylinder Head Studs Head Gaskets Rocker Covers Head Gaskets

Crankshaft ..................... 70 Raw Forged Crankshafts Crankshaft 70 Semifinished Crankshafts

.....................

Raw Crankshafts CrankForged Checking Semifinished Crankshafts Crank Checking

Balancing ....................... 82 Counterweighting Balancing 82 Counterweighting Bearings .......................... 84 Modifying V8 Crank Bearings for V6s Bearings..

84 Heavy-Duty Cam Bearings

....................... ........................

Modi'fying V8 Crank Bearings for V6s Heavy-Duty Cam Bearings

Flywheel and Flywheel Torsionaland Dampener .... 86 Flexplates Torsional Dampener 86 Bellhousing Alignment

....

..

FlexplatesDampener Torsional Bellhousing Alignment Torsional Dampener

.r

Connecting Rods ......... .. 90 Aftermarket Steel and Aluminum Rods 90 Connecting Rods

2;.

T I , .Power , 2,,:".Buick Source .... , ,a,;,. ,+,,a

2 Buick Power Source

,.

...........

W-i..

....

.

~

Aftermarket Steel and Aluminum Rods

Engine Lubrication..... 112 The Stock System Engine Lubrication 112 Production Pump Clearances

.....

T h e StockPumps System External Production P u m p Clearances Filtering External Pumps Oil Filtering Additives Oil Leaks Oil Additives Oil Leaks

Intake System .............. 124 Stock Hardware Intake System 124 Aftermarket and Stage II Hardware

..............

StockInjection Hardware Fuel Aftermarket and Stage I1 Hardware Fuel Injection

Pistons ............................. 94 Buick Heavy-Duty Pistons Pistons 94 Aftermarket Pistons

.............................

Buick Heavy-Duty Pistons Rings Aftermarket Pistons Valve-to-Piston Clearance Check Rings Valve-to-Piston Clearance Check

Ignition System ........... 128 Buick Power System Source Ignition Ignition 128 Aftermarket Ignition

...........

Buick Power Ignition WiresSource Ignition Aftermarket Spark Plugs Ignition Ignition Wires Tachometers Spark Plugs Glossary Tachometers Glossary

Valvetrain ..................... 100 Camshaft Valvetrain 100 Lifters

.....................

Camshaft Valve Springs and Retainers Lifters Rev Kits Valve and Retainers RockerSprings Assemblies Rev Kits Valves RockerModifications Assemblies Valve Valves Valve Grinding Valve Modifications Gear Drives Valve Grinding Gear Drives

Front Covers ................ 108 Front Cover Seals Front Covers 108 Cam Stop

................

Front CoverClearance Seals Gear Drive Cam Stop Aftermarket Front Covers Gear Drive Clearance Aftermarket Front Covers

Exhaust System ........... 138 Stage II Exhaust Manifold Exhaust System 138 Turbocharged Applications

...........

Stage I1 Exhaust Recently ProducedManifold Buick Manifolds Turbocharged Applications Recently Produced Buick Manifolds

Operating Conditions/ Operating Conditions/ Blueprinting Records .. 142 Engine Run-In Blueprinting Records ..I42 Oil Engine Fuel Run-In Oil Coolant Fuel Engine Temperature Coolant Record-Keeping Forms Engine Temperature Record-Keeping Forms

Engine Parts ................ 162 Engine Parts 162 Suppliers ....................... 174 Buick Power Source Suppliers 174

................ .......................

3

Buick Power Source 3

4

-Building a High-Perforn High-Perforn

T: T

hiS his information and related specificspecifications are intended to aid anyone preparing a Buick V6 for heavy-duty or offoffhighway use. Basic engine specifications and building suggestions apply to road, road, oval track or drag racing unless specifically noted otherwise.

Buick V6 engines have been built in the followfollowing displacements.

2.5L and 4.5L engines should not be considered disdisplacement limits for the Buick V6; V6; they are simply practical limits.

2.5L 2.5L (151 (151 cubic inches) inches)

Engine Specifications V6 Displacement 198 198 225 225 231-3.8L 231-3.8L 252-4.1L 2524.1L 196-3.2L 196-3.2L 181-3.0L 181-3.OL

Bore 3.625 3.625 3.750 3.800 3.800 3.965 3.965 3.500 3.500 3.800 3.800

x X X x x X X x X X X

Stroke 3.200 3.200 3.400 3.400 3.400 3.400 3.400 3.400 2.660

Years Produced 1962-63 1964-67 1975-86 1980-84 1980-84 1978-79 1982-86 1982-86

All current production Buick V6 engines (regard(regardless of displacement) displacement) are built on common tooling, tooling, which means items such as camshafts, camshafts, valvetrain hardware, rod and main bearings, distributors, distributors, etc., etc., are interchangeable. interchangeable. All production crankshafts, connecting rods and pistons are cast. cast. Engines are applibuilt for manual and automatic transmission applications. cations. In production there are frontfront- and rearrearwheel-drive blocks; blocks; the difference is in the bellhousing bolt pattern, oil pan flange and starter location.

The heavy-duty Stage I and II I1 blocks referred to in this volume are of a rear-wheel-drive rear-wheel-drive bolt-pattern configuration and cannot be used in a front-wheelfront-wheeldrive configuration without modification.

It is also important to understand that Buickbuilt V6 engines are used by other General Motors Divisions. You can readily identify the Buick-built V6 by noting that the distributor is placed at a t the front of the engine, engine, whereas the distributor in V6 engines built by other GM divisions is at a t the rear bellhousing. of the engine adjacent to the bell housing.

Buick Motor Division is currently building both frontfront- and rear-wheel-drive rear-wheel-drive assemblies. While the machining of components components (bore (bore centers, centers, etc.) etc.) is basisame, many pieces do not interchange bebecally the same, tween frontfront- and rear-wheel-drive rear-wheel-drive engines. engines. For instance, a front-whee front-wheel-drove does not bolt to a stance, I-drove block does rear-wheel-drive bellhousing or an automatic transtransrear-wheel-drive mission. This This volume concerns concerns itself only with rearrearmission. wheel-drive hardware and the modifications needed to make that hardware heavy-duty. heavy-duty.

Competitive Competitive Combinations Combinations The Buick V6 engine is quite flexible in terms of usthe number of displacements that can be built using both production and aftermarket hardware.

Displacements of 2.5 2.5 liters (151 (151 cubic cubic inches) inches) to 4.5 liters (272 (272 cubic inches) inches) are easily attainable. attainable. The 4 Buick Power Source Source

In 1979, 1979, Buick built some 3.2L (196-cubic-inch) (196-cubic-inch) engines in production. By using this 3.500-inch 3.500-inch bore block and a production 3.0L 3.OL crank having a stroke of 2.66 inches, inches, the 2.5L V6 engine becomes a realreality with a production block and crank. crank. By using a 6.5-inch 6.5-inch connecting rod, rod, compression height of the piston is an acceptable 1.70 1.70 inches. Stage I cylinder heads would be adequate for this displacement. displacement. A professionally assembled engine built to these didimensions can be raced at a t 8000 8000 rpm. The 2.5L Buick V6 would be a formidable package in many forms forms of racing because it has a wide torque curve (much (much wider than the curves offered by the 4-cylinder 4-cylinder enengines it would be competing against). against).

3.0L 3.OL (182 (182 cubic inches) inches)

There are a number of competitive arenas for 3.0L 3.OL engines. Currently, the 3.0L 3.OL displacement can be raced in 1M SA GT /P either normally aspirated IMSA GT/P or turbocharged. In addition to finding a home in SCCA's Trans Am class in turbocharged form, form, this package makes an impressive powerplant for midgmidget racing.

The 3.QL 3.OL displacement can be reached with a 3.800-inch 3.800-inch bore and a 2.66-inch stroke, stroke, which is a highly overs quare package. Stage I cylinder heads oversquare are adequate for this displacement if it is normally aspirated. A rod length of 6.35 6.35 inches is recomrecommended for this engine. engine. This is the same rod length that a production 3.0L 3.OL engine has. has. As more Buick V6 competition engines are built, it is increasingly evident that rod length has little or nothing to do with horsepower or torque; torque; so, so, you should consider using the longest rod practical to minimize cylinder wall loading. With the above mentioned dimensiondimensional package, some dome dome will be needed to obtain adadequate compression ratio (12.5:1) (12.51) for competition. If this engine is built using Stage I cylinder heads, rpm should be limited to 6500.

6500. Stage II I1 valvetrain should be limited to 8500.

8500.

3.4L 3.4L (209 (209 cubic inches) inches)

Current CART /USAC rules allow turbocharged CART/USAC stock block engines to compete against exotic exotic racing engines. Two-dimensional configurations of this displacement have been built-4.00 built-4.00 x 2.75 inches inches and 3.800 3.800 x 3.06 inches. Both configurations produced identical identical torque and horsepower. Both configconfigurations have been built with 6.56.5- and 5.9-inch 5.9-inch rods, again with no difference. Thus, Thus, for the sake of durability the configuration of 3.800 3.800 x 3.06 inches with a 6.5-inch 6.5-inch rod is recommended. These engines can safely be taken to 8800 8800 rpm.

Buick heavy¡duty heavy-duty parts are designed and manufactured for off-highway off-highway use only. only.

~nce~================ I

r

In the 1985 running of the Indianapolis 500, stock block turbocharged Buick V6 engines were in In the 1985Inrunning of thethe Indianapolis 500, competition. racing form, engine produces stock block turbocharged Buick V6 engines were in more than 800 horsepower at 8000 rpm. competition. In racing form, the engine produces more than 800 horsepower a t 8000 rpm.

Engine Features Configuration Horsepower Configuration Torque Horsepower Rev limit Torqueboost Turbo Rev limit Displacement Turbo Ignitionboost

90 Features V6, two valves/cylinder Engine

Displacement Ignition Fuel system Bore Fuel system Stroke Bore Cylinder head

Stroke Cylinder head Valve lifters Crankshaft Valve lifters Block

Crankshaft Block Fuel Compression ratio Fuel valve Intake Compression Exhaust valveratio Intake valverod Connecting Exhaust valve Piston Connecting rod Piston Oil pressure Oil system

Oil pressure Oil system Push rods Cam drive

Pushrods Camshaft Cam drive Camshaft

0

750 at 8000 rpm 90" V6, twoatvalves/cylinder 540 lbs.lft.

6000 rpm 750 a rpm t 8000 rpm 8600 540in. lbs./ft. a t 6000 rpm 57 Hg-absolute 8600 rpm 209 in' 57 in. Hg-absolute Buick Computer Controlled Coil 209 in" Ignition Buick Computer Coil Port fuel injectedControlled / mechanical 3.8Ignition inches Port fuel injected/mechanical 3.06 inches 3.8 inches Buick Stage II, iron or 3.06 inches aluminum Buick Stage 11, iron or Roller type with high-rev kit aluminum Buick forged, even-firing Roller cast-iron type withStage high-rev Buick II- kit Buick forged, even-firing four-bolt mains Buick cast-iron Stage IIMethanol 9:1four-bolt mains Methanol 2.022-diameter titanium 9:l Inconel l.60 diameter 2.022-diameter Carrillo 6.5-inchtitanium Inconel 1.60 diameter Forged-aluminum l.5-inch Carrillo 6.5-inch compression height Forged-aluminum 1.5-inch 100 psi compression height Dry-sump pumps fitted 100 to psi Buick Stage II block Dry-sump pumps fitted 8.08-inch to Buick Gear type Stage I1 block 8.08-inch steel Hardened

Gear type Hardened steel

4.0L (244 cubic inches)

The 4.0L Buick V6, normally aspirated, but with 4.OL injection, (244 cubic readily inches) fits into the rules of IMSA fuel The 4.OL Buick V6, normally buta with GT/P. This is endurance racing aspirated, at its finest, fuel intowhen the rules of IMSA pointinjection, you mustreadily keep infits mind building a GT/P. V6 This endurance a t its finest, a enBuick foristhis type of racing competition.

The 4.0L point you must keep in mind when building a gine has been successfully built in two configuraBuick V6 for this type offeatures competition.

The 4.OLa entions. One combination a 4-inch bore, gine has been successfully built rod. in two 3.23-inch stroke, and a 6.5-inch Theconfiguraother comtions. Oneutilizes combination features a 4-inch bore, a bination a 3.830-inch bore, a 3.500-inch 3.23-inch stroke, and a 6.5-inch rod.

The other stroke, and a 6.380-inch rod. The rod length in comboth bination utilizes a 3.830-inch bore, aheight 3.500-inch combinations allows a compression of 1.400 stroke, a 6.380-inch rod.

Theon rodpiston lengthinventoin both inches, and which in turn cuts down combinations compression of 1.400 ry.

Due to theallows naturea of the racing, height these engines inches, which in turn cutsrpm. down on piston inventoshould be limited to 8000 ry. Due to the nature of the racing, these engines 4.3L (265 cubic inches) should be limited to 8000 rpm.

Several circle track associations have established 4.3L (265 cubic inches) limiting displacement to 265 classes for V6 engines Several circle track associations havebuilt established cubic inches. These engines are easily with a classes V6 engines to 265 bore of for 4 inches and a limiting stroke ofdisplacement 3.5 inches, and cubicainches.

Theseofengines are easily built with a with rod length 6.380 inches, a compression bore of of 4 inches and a is stroke of 3.5 inches, andother height 1.400 inches maintained.

Like the with a rod length of 6.380 inches, a compression combinations, the 4.3L can be spun to 8000 rpm. height of 1.400 inches is maintained. Like the other 4.5L (272 cubic inches) combinations, the 4.3L can be spun to 8000 rpm.

When allowed for competition, this displacement 4.5L (272 cubic inches) with a 4.00-inch bore and a engine can be fashioned When allowed this displacement 3.625-inch stroke.for Bycompetition, using a 6.300-inch rod, comengine be fashioned with aat4.00-inch bore and pressioncan height is maintained 1.400 inches.

Oncea 3.625-inch stroke.

By using a 6.300-inch rod, comagain, 8000 rpm is the practical limit of operation. pression height is maintained a t 1.400 inches. Once All Displacement again, 8000 rprn is the practical limit of operation.

In all cases, the rpm limit has been established All Displacement assuming titanium valves are being used. If steel In cases, rprn limit has should been established valvesallare to bethe used , rev limits be lowered assuming titanium valves are being used. If steel by 1000 rpm. valves are to be used, rev limits should be lowered by 1000 rpm.

Buick Power Source 5 -

Buick Power Source

5

USAC Turbocharged Indy* Turbocharged IndyRECORD * BUICK USAC STAGE II ENGINE BUILD AND CHECK Engine BUICK type

Indy STAGE I1 ENGINE BUILD AND CHECK RECORD

Displacement Engine type Fuel requirement Displacement

3.4L Indy Methanol 3.4L

Fuel requirement

Methanol *57 inches of boost *57 inches of boost

DL

F P W

5

VI

750

4

n ,700 2

5 ~ J I

2 3.

650

SJ 2-

sz

P

550

f3

3

2

k

500

\I\

5200 5800 6000 6400 6800 7200 7600 8000 8400 RPM I

...

6 Buick Power Source

Buick heavy-duty parts are designed and manufactured for off-highway use only.

6 Buick Power Source

Buick heavy-duty park are designed and rnanirfaclured for off-highway use only.

PISTON Piston make PISTON Compression Piston make height Wristpin type;height length Compression

Diamond 1.485 Diamond Diamond 1.485 0.927 Diamond

Wristpin type; diameter length W ristpin clearance Wristpin diameter in piston Wristpin retainer clearancetype in piston

0.0014 0.927 Sl2irolocks 0.0014

Wristpin retainer type

Spirolocks

PISTON SIZE AND BORE CLEARANCE Cy linder No.SIZE AND BORE CLEARANCE PISTON

2.750

2.750

1

3

5

Bore size No. Cylinder

3.8000 1

Piston size Bore size Clearance Piston size

3.7924 3.8000 0.0076 3.7924

3.8000 3 3.7924 3.8000

3.8000 5 3.7923 3.8000

0.0076 3.7924

0.0077 3.7923

Clearance Cy linder No.

0.0076 2

0.0076 4

0.0077 6

Bore size No. Cylinder

3.8000 2

3.8000 4

3.8000 6

Piston size Bore size Clearance Piston size

3.7925 3.8000 0.0075 3.7925

3.7923 3.8000 0.0077 3.7923

3.7923 3.8000 0.0077 3.7923

Clearance

0.0075

0.0077

0.0077

1116

0.020

1116 1/16

0.018 0.020

3116 1/16

0.018

PISTON RING PISTON RING

Top type; width; gap Ringring set make; part No. 2nd ring type; Top type; width; width; gap

Sealed Power Sealed Molyc.

Power RBT Moly.

Oil 2nd ring ring type; type;width; width;gap gap

RBT

Ring set make; part No.

Oil ring type; width; gap

%s

Buick Power Source

7

Buick Power Source

7

PISTON DECK CLEARANCE Cy linder No.DECK CLEARANCE PISTON

1

3

5

Deck clearance Cylinder No.

0.017 1

0.017 3

0.019 5

Deck clearance Cy linder No.

0.017 2

0.017 4

0.019 6

clearance Deck Cylinder No.

2 0.018

4 0.017

6 0.017

Deck clearance ENGINE BEARING Main bearingBEARING make ENGINE

0.018

0.017

0.017

Clevite

Rod Mainbearing bearingmake make

Vandervell Clevite

Rod bearing make

CRANKSHAFT Crankshaft make; type CRANKSHAFT

Vandervell

Stroke Crankshaft make; type Endplay Stroke Endplay Main Bearing No.

3.070 Moldex 0.0006 3.070 0.0006 1

Moldex

2

3

4

2.6875 3 2.5012 2.6875

2.6875 4 2.5012 2.6875 2.4987 2.5012 0.0025 2.4987

0.0025

Housing diameter Main Bearing No.

2.6875 1

2.6875 2

Housing diameter with bearing Crankshaft main journal diameter Housing diameter with bearing

2.5012 2.6875 2.4987 2.5012

2.5012 2.6875 2.4987 2.5012

Main bearing clearance Crankshaft main journal diameter

0.0025 2.4987

0.0025 2.4987

2.4987 2.5012 0.0025 2.4987

Main bearing clearance

0.0025

0.0025

0.0025

Buick Power Source

Buick heavy-duty parts are designed and manufactured for off-highway use only.

8 Buick Power Source

Buick heauy-duty parts are designed and manufactured for off-highway use only.

8

CONNECTING ROD Rod make; type CONNECTING ROD

Carrillo

Steel

6.5 Carrillo 0.010 6.5 0.9284 0.010 0.0014 0.9284 7/16 0.0014

Steel

90 ft./lbs.

7/16

SPS

90 ft./lbs.

1

3

5

Housing diameter Connecting Rod No.

2.3738 1

2.3738 3

2.3738 5

Housing diameter with bearing Crankshaft rod journal diameter Housing diameter with bearing Rod bearingrod clearance Crankshaft journal diameter Rod bearing clearance Connecting Rod No.

2.2506 2.3738

2.2505 2.3738

2.2506 2.3738

2.2482 2.2506

2.2481 2.2505

0.0024 2.2482 0.0024 2

0.0024 2.2481

0.0024 4

2.2482 2.2506 0.0024 2.2482 0.0024 6

Housing diameter Connecting Rod No.

2.3738 2

2.3738 4

2.3738 6

Housing diameter with bearing

2.2505 2.3738

2.2505 2.3738

2.2505 2.3738

Crankshaft rod journal diameter Housing diameter with bearing

2.2481 2.2505

2.2481 2.2505

2.2481 2.2505

Rod bearingrod clearance Crankshaft journal diameter

0.0024 2.2481

0.0024 2.2481

0.0024 2.2481

Rod bearing clearance

0.0024

0.0024

0.0024

Length (center Rod make; typeto center) Side clearance Length (center to center) W ristpin bore diameter Side clearance W ristpin bore clearance in rod Wristpin diameter Rod bolt make; size in rod Wristpin clearance Rod bolt torque make; size Rod bolt torque Connecting Rod No.

SPS

Buick Power Source

9

Buick Power Sdurce 9

COMPRESSION RATIO Piston at BDC in bore RATIO COMPRESSION Swept Piston volume* a t BDC in bore Dome or dish (+) volume Swept (-) volume* Ring (-) orvolume dish (+) volume Domeland Deck land volume Ring volume Head volume gasket volume Deck chamber volume Head gasket volume

Head chamber volume

CYLINDER HEAD Intake valve type;HEAD size CYLINDER Exhaustvalve valvetype; type;size size Intake Valve spring Exhaust valvemake; type; size size Valve spring make; installed sizeheight Valve spring seat pressure installed height Valve spring open pressure seat pressure Retainer make; material Valve spring open pressure Keeper Retainertype make; material Chamber volume Keeper type Head gasket type; thickness Chamber volume Val ve gasket seal make; Head type;type thickness

Valve seal make; type

570.3 16 570.3 1.5 16 3.1 1.5 8.4 3.1 40 8.4cc 639.3 Total = 40 cc CR = total -:- (total -Total swept=volume) 639.3 = 9.25:1 CR = total -[eel(total - swept volume) CR 'Swept volume = (bore}' X stroke X 12.87 CR = 9.25:l *Swept volume [cc] = (borep x stroke x 12.87

Titanium

2.080

Titanium Reed Titanium

1.600 2.080 14296 1.600 14296

1.890 Reed 160 1.890 450 160 Reed 450

at

1.300

at

Titanium 1.300

10° Reed 40 10" Fel40Pro FelPCPro

Titanium

PC

Teflon

0.040 Teflon 0.040

10 Buick Power Source

Buiek heavy-duty parts are designed and manufactured (or off-highway use only.

10 Buich Power Source

Buick heavy-duty parts are designed and manufactured for off-highwayuse only.

CAMSHAFT Drive make; type Cam make; No. of cam Type of Camshaft lobe separation Intake duration at 0.050 Exhaust duration aatt 0.050 Intake lobe center installed aatt Intake lobe lift Exhaust lobe lift valve-to-piston clearance Intake valve-to-piston valve-to-piston clearance Exhaust valve-to-piston Intake valve lash Exhaust valve lash

Milodon Milodon Buick Buick Roller 108 0 276 0 276 0 107 0

Gear drive 276 1400" 1108 276°/400"/1080

0

0

OAOO OAOO 100 ATDC 0.110 at 10"

0.180 at 10° 10" BTDC 0.025 0.025

VALVETRAIN Rocker arm; make type Rocker aarm r m ratio Total intake lift at valve Total exhaust lift at a t valve Pushrod length; length; diameter Lifter make; type

T&D T&D

Roller

17 17 0.655 0.655 Dart

8.080

Iskenderian

Roller

NOTES

Buick Power Power Source Source 11 I1 Buick

Trans Am Trans Am BUICK STAGE II ENGINE BUILD AND CHECK RECORD EngineBUICK type Displacement Engine type Fuel requirement Displacement

Fuel requirement

STAGE I1 ENGINE BUILD AND CHECK RECORD Stage II

V6 272 inches Stage I1 V6 Race gas 272 inches Race gas

12 Buick Power Source

Buick heavy-duty paris are designed and manufactured for ofr- highway use only.

12 Buick Power Source

Buick heavy-duty parts are designed and manufactured for ofphighway use only.

PISTON PISTON

Piston make; type

Cosworth

Compression Piston make; height type

1.200 Cosworth

Wristpin typeheight Compression

Cosworth 1.200

W ristpin diameter Wristpin type

0.927 Cosworth

Forged alummum

Forged aluminum

W ristpin clearance Wristpin diameter in piston

0.0008 0.927

Wristpin retainer size clearancetype; in piston

Cosworth 0.0008

0.927

Cosworth PISTON SIZE AND BORE CLEARANCE PISTONNo.SIZE AND BORE CLEARANCE1 Cylinder

0.927

Wristpin retainer type; size

3

5

Cylinder Bore size No.

1 4.000

3 4.0003

5 4.0002

Piston size Bore size

3.944 4.000

3.9942 4.0003

3.9942 4.0002

Clearance Piston size

0.006 3.944

0.0061 3.9942

0.006 3.9942

Clearance Cy linder No.

0.006

0.0061

0.006

Cylinder Bore size No.

2 4.000

4 4.0002

6 4.0006

Piston size Bore size

3.9942 4.000

3.9942 4.0002

3.9942 4.0006

Clearance Piston size

0.0058 3.9942

0.006 3.9942

0.0062 3.9942

Clearance PISTON RING PISTON RING

0.0058

0.006

0.0062

Sealed Power

R9771

Make of ring set; part No.

2

type;set; width; Top Makering of ring partgap No.

Sealed 0.062 Power

2nd ring type; Top type; width; gap

4

6

0.062 R9771

0.062

0.062

0.062 0.062

0.062 0.062

Oil 2nd ring ring type; type;width width; gap

0.189 0.062

0.189 0.062

0.062

Oil ring type; width

0.189

0.189

1

Buick Power Source

13

Buich Power Source

13

1 PISTON DECK CLEARANCE Deck clearance

0.001

0.002

0.001

-

p 4 6 PISTON DECK CLEARANCE Deck clearance Cylinder No.

ENGINE BEARING Deck clearance Main bearing make; part No. Cylinder No. Rod bearing make; part No. Deck clearance

CRANKSHAFT ENGINE BEARING

Crankshaft make; type Main bearing make; part No. Stroke Rod bearing make; part No. Endplay

CRANKSHAFT Main Bearing No.

0.002 1

0.002 3

0.002 5

0.001 0.002 0.001 Vandervell VP91265 2 4 6 Vandervell VP91818 0.002 0.002 0.002

Moldex Vandervell 3.625 Vandervell

Buick VP91265 VP91818

Crankshaft make; type Housing diameter with bearing Stroke Crankshaft main journal diameter Endplay Main bearing clearance Main Bearing No.

1 Moldex 2.5011 3.625 2.4988 0.007 0.0023 1

3 2 Buick 2.5012 2.5012

2.5012

2.4989

2.4988

2.4988

0.0023 2

0.0024 3

0.0024

Housing diameter with bearing

2.5011

2.5012

2.5012

2.5012

Crankshaft main journal diameter

2.4988

2.4989

2.4988

2.4988

Main bearing clearance

0.0023

0.0023

0.0024

0.0024

14 Buick Power Source

14 Buick Power Source

4

4

Buick heauy-duty parts are designed and manufactured for off-highwayuse only.

Buick heavy·duty paris are designed and manufactured for off-highway use only.

CONNECTING ROD Rod make; type CONNECTING ROD

Carrillo

Steel

Length (center Rod make; typeto center) Side clearance Length (center to center) ristpin bore diameter W Side clearance

6.5 Carrillo 0.012 6.5

Steel

clearance in rod W ristpin bore Wristpin diameter size in rod Rod bolt make; Wristpin clearance

0.001 0.928 SPS 0.001

7116

Rod bolt torque make; size

90 SPS ft.llbs.

7/16

Rod bolt torque Connecting Rod No.

90 ft./lbs.

1

3

5

Connecting Rod No. Housing diameter

1 2.3741

3 2.3741

5 2.3741

Housing diameter with bearing

2.251 2.3741 2.2483 2.251

2.2509 2.3741

Crankshaft rod journal diameter Housing diameter with bearing

2.251 2.3741 2.2483 2.251

bearingrod clearance Rod Crankshaft journal diameter

0.0027 2.2483

0.0027 2.2483

2.248 2.2509 0.0029 2.248

Rod bearing clearance Connecting Rod No.

0.0027 2

0.0027 4

0.0029 6

Housing diameter with bearing Connecting Rod No.

2.2509 2

2.251 4

2.2508 6

Crankshaft rod journal Housing diameter with diameter bearing

2.2482 2.2509

2.2483 2.251

bearingrod clearance Rod Crankshaft journal diameter

0.0027 2.2482

0.0027 2.2483

2.248 2.2508 0.0028 2.248

Rod bearing clearance

0.0027

0.0027

0.0028

0.928 0.012

Buick Power Source

15

Buick Power Source 15

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