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: 2002 Chevrolet 345 HP 346 V8

CHEV-02 Issued: 6/26/2002 Last Revised: 1/22/2019 Revisions: 07-29-02,7-30-02, 12-19-02, 3-3-05, 3-27-06 WR, 9-27-06 WR, 4-17-07 WR, 7-10-07 WR, 1-22-19 PC

Engine Family: General Motors, Chev V8 LS Series Advertised Comp Ratio: 10.20:1 Induction: PFI Engine Type: V8

Basic Specs:	Bore	Stroke	Main Journal Dia	Rod Journal Dia	Max Bore	Max Stroke	Max Displacement
	3.898"	3.622"	2.559"	2.100"	3.978"	3.637"	361.6 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
	416 g	1.310"	80 g	1/16, 1/16, 3/16	43 g	6.100"	6.125"	593 g	1132 g

Compression:	Deck Height	Head Gasket	Piston Type	Dome/Dish Vol	Dome/Dish Hgt	Comb Chamber Vol	Max Compression
	.015" AB	.052"	Flat	0 cc	0	64.9 cc	11.23:1

Valve Train:	Int Rocker Ratio	Exh Rocker Ratio	Intake Valve	Exhaust Valve	Lifter Type	Spring Type	Lifter Dia.
	1.70:1	1.70:1	2.000"	1.550"	Hyd/Roller	Outer w/damper	0.842"

Camshaft:	Intake Lift	Exhaust Lift
	.515"	.515"

Casting No.	Intake Volume	Exhaust Volume
10215339	210.0cc	80.0cc	LS1 head
12558806	210.0cc	80.0cc	LS1 head
12559853	210.0cc	80.0cc	LS1 head
12564241	210.0cc	80.0cc	LS1 head

Intake Manifolds:	Casting No.
	12560688	Composite
	12561184	Composite
	12573572	Composite

Number	Manufacturer	Trans	Type	Throttle Bore
23949	AC/Rochester	ALL	Throttle Body	2.954"	Throttle Bore - 2.954" (75 mm)
23950	AC/Rochester	ALL	Throttle Body	2.954"	Throttle Bore - 2.954" (75 mm)
2677D1	AC/Rochester	ALL	Throttle Body	2.954"	Throttle Bore - 2.953" (75 mm)
726178	AC/Rochester	ALL	Throttle body	2.954"	Throttle Bore - 2.954" (75 mm)
97040	AC/Rochester	ALL	Throttle Body	2.954"	Throttle Bore - 2.954" (75 mm)
C75-2	Accufab	ALL	Throttle Body	2.954"	75mm 2.954" throttle bore

Power Factors:	Stock Man		Stock Auto		S/S Man		S/S Auto		GT Man		GT Auto		GTFwd Man		GTFwd Auto
Base Factors	350	1/1/19	350	1/1/19	340		340		305	8/6/13	313	1/1/14	305	8/6/13	313	1/1/14

Accepted Replacement Pistons for Stock Eliminator

   Effective 9/18/2022
Specs:     Comp Hgt-1.310"    Pin Dia-0.927"    Rings-1/16, 1/16, 3/16
Distance to Top Ring-0.165"    Piston Min Weight-416g

Manufacturer	Part Number

CP Pistons

C15-CP

Diamond

LS1-1

169283

208194

295643

Lunati

LS1

Optional 1.2mm , 1.5mm, 3.0mm; 28g Ring Wgt; 1117 Assy Wgt

Ross

63184

Venolia

LS-1

Accepted Replacement Oil Pans for Stock Eliminator

Engine Group - Chev V8 LS Series Effective 5/10/2022

Manufacturer	Part Number

Moroso

21151

COPO 427

Accepted Aftermarket Crankshafts

Manufacturer	Part Number

Callies

APH317-CS

Chevy LS

Accepted Replacement Blocks

Manufacturer	Part Number

GM Performance Parts

12572808

GM Performance Parts

19260093

Accepted Replacement Connecting Rods for Stock or S/S

Effective 8/23/2023
Specs: C/C Length- 6.100" Min Weight- 593g Journal Dia- 2.100" Big End Dia- 2.225" Pin Dia- 0.927"

Manufacturer	Part Number	C/C Length	Wgt.	Pin Dia.

Carrillo

BCLS-61271

6.125"

645g

0.927"

SB Chevrolet Large Journal

Carrillo

C-BLSPE

6.100"

595g

0.927"

Super Stock only

Carrillo

C-LS1

6.125"

639g

0.927"

SB Chev Large Journal

Carrillo

CLS1-A76125H

6.100"

615g

0.927"

SB Chev Large Journal **Discontinued**

CAT

CRS-6125

6.125"

651g

0.927"

SB Chev Large Journal

CompStar

CS6100DS2A2AH

6.100"

607g

0.927"

SB Chev Large Journal

CompStar

CS6125DS2A2AH

6.125"

619g

0.927"

SB Chev Large Journal

Crower

ML93951B-1

6.102"

593g

SUPER STOCK ONLY

Eagle

6125BS

6.125"

650g

0.927"

SB Chev Large Journal

CH6098ALLB-LS

6.098"

685g

0.927"

SB Chev Large Journal

Manley

14031

6.125"

602g

0.927"

SB Chev Large Journal

Manley

14106

6.100"

593g

0.927"

SB Chev Large Journal

Manley

14359

6.125"

612g

0.927"

SB Chev Large Journal

Manley

14442

6.109"

605g

0.927"

SB Chev Large Journal

Manley

14443

6.097"

593g

SUPER STOCK ONLY

Molnar Technologies

CH6125NLB-LS8-A

6.125"

597g

0.927"

SB Chev Large Journal

Oliver

C6098LS1-STLT

6.098"

652g

0.927"

SB Chev Large Journal

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: