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Specifications on slant six engine

170-225 cubic inch engines

Type----------------------------------------------------------------------------- In-Line OHV

Number of Cylinders------------------------------------------------------- 6

Bore----------------------------------------------------------------------------3.40"

Stroke-- 170 Cubic Inch--------------------------------------------------3.125"

             225 Cubic Inch-------------------------------------------------4.125"

Piston Displacement-------------------------------------------------------170-225 Cubic Inch

Compression Ratio-- 170 Cubic Inch----------------------------------8.50 to 1

                             225 Cubic Inch---------------------------------8.40 to 1

Compression pressure with engine warm, spark plugs removed, wide-open throttle----- 110-140 psi

Maximum variation between cylinders (any one engine)-------------------------------------------20 psi

Firing order------------------------------------------------------------------ 1-5-3-6-2-4

Basic timing-All without C.A.P.-----------------------------------------5 degrees B.T.C.

With C.A.P.- 170 Cubic Inch Manual Transmission----------------5 degrees A.T.C.

                                       Automatic Transmission------------2-1/2 degrees A.T.C.

                   225 Cubic Inch All--------------------------------------- T.D.C.

Crankshaft

Type-----------------------------------------------------------------------------Fully Counter-Balanced

Bearings------------------------------------------------------------------------Steel-Backed Babbitt

Main Bearing Journal Diameter-----------------------------------------2.7495 to 2.7505"

Connecting Rod Journal Diameter-------------------------------------2.1865 to 2.1875"

Maximum out-of-round permissible------------------------------------.001"

Number Main Bearings-----------------------------------------------------4

Clearance Desired-----------------------------------------------------------.0005 to .0015"

Maximum Clearance Allowance before Reconditioning----------.0025"

End Play-------------------------------------------------------------------------.002" to .007"

Thrust Taken by--------------------------------------------------------------No. 3 Main Bearing

Finish at rear seal surface------------------------------------------------Diagonal knurling

Interchangeability of Bearings-------------------------------------------Upper Nos. 2, 4

                                                                                     Lower Nos. 1, 2, 4

Main Bearing 

All available in standard and the following undersized------------.001, .002, .003, .010, .012"

Connecting Rods And Bearings

Type-------------------------------------------------------------------------------Drop Forged "I" Beam

Length (center to center)-------------------------------------------------170 - 5.705 to 5.709"

                                                                                      225 - 6.697 to 6.701"

Weight (less bearing shells)------------------------------------------------170-25.3 oz.

                                                                                     225-26.8 0z.

Extreme Slant 6