413ci 6.7l or 6.8l ?

[Just 1 More]

When I search for parts, I see the 413 listed as a 6.7L or 6.8L, how do I know what I have? Supposedly out of a late 70's motorhome.

 

[69Bee]

A 413 is a 413, "Real" American motors aren't measured in liters.

but if you really have to convert, it would be 6.8L

 

[Just 1 More]

A 413 is a 413, "Real" American motors aren't measured in liters.

but if you really have to convert, it would be 6.8L

this is what i'm running in to

 

[Just 1 More]

A little google searcing I figure it should be the RB 6.8L

Design​

Design features of the B and RB engines include 17 capscrews per cylinder head, a cylinder block that extends 3 in (76.2 mm) below the crankshaft centerline, an intake manifold not exposed to crankcase oil on the underside, stamped-steel shaft-mounted rocker arms (race versions used forged steel rockers), and a front-mounted external oil pump driven by the camshaft.

The 'B' series wedge engine was introduced in 1958 with 350 cu in (5.7 L) and 361 cu in (5.9 L) versions. The 361 would continue in production until the end of the series, albeit only for truck installation. The RB ("raised B") arrived one year after the launch of the B series engines, in 383 cu in (6.3 L) and 413 cu in (6.8 L) displacements. Unlike the previous B-engines, which had a 3+3⁄8-inch (85.7 mm) stroke, the RB engines had a 3+3⁄4-inch (95.3 mm) stroke.

For 1960, a "ram induction" system increased the 413's torque up to 495 lb⋅ft (671 N⋅m) on the Chrysler 300F versions.

The last 'B-RB' wedge-headed engine was produced in August 1978, ending the era of Chrysler "big-block" engines.

413​

The 413 cu in (6.8 L) RB was used from 1959 to 1965 in cars. It was also used in medium and heavy trucks including truck-tractors such as the C-1000, up until 1979. It has a bore of 4.1875 inches. During that period, it powered almost all Chrysler New Yorker and all Imperial models, and was also available on the lesser Chryslers, Dodge Polara, Dodge Monaco, and Plymouth Fury as an alternative to the B-block 383 and the A-block 318. It was also fitted to some European cars such as the later Facel Vega Facel II.

In the 1959 Chrysler 300E the 413 wedge was fitted with inline dual four-barrel carburetors; it was factory-rated at 380 bhp (283 kW) at 5,000 rpm and 525 lb⋅ft (712 N⋅m) at 3,600 rpm.[5] In 1960, a long-tube ram induction system was made standard on the Chrysler 300. It continued as standard on the 1961 300-G, and remained on the option sheets for Chrysler 300s through 1964. In 1962, a special version known as the "Max Wedge" was made available for drag racing and street use; this version produced 420 bhp (313 kW) at 5,000 rpm.

Engine specifications

Model years	Fuel system	Power	Torque	Compression ratio
1959–1961	4-barrel carburetor	340 hp (254 kW) at 4600 rpm	480 lb⋅ft (651 N⋅m) at 2800 rpm	10.0:1
1959	2 × 4-barrel carbs	380 hp (283 kW) at 5000 rpm	525 lb⋅ft (712 N⋅m) at 3600 rpm
1960–1961	375 hp (280 kW) at 5000 rpm	525 lb⋅ft (712 N⋅m) at 2800 rpm
1962	4-barrel carb	340 hp (254 kW) at 4600 rpm	480 lb⋅ft (651 N⋅m) at 2800 rpm	10.1:1
1962	2 × 4-barrel carbs	380 hp (283 kW) at 5000 rpm	525 lb⋅ft (712 N⋅m) at 2800 rpm
1963-1965	4-barrel carb	360 hp (268 kW) at 4600 rpm	495 lb⋅ft (671 N⋅m) at 2800 rpm
1963-1964	2 × 4-barrel carbs	390 hp (291 kW) at 4800 rpm	530 lb⋅ft (719 N⋅m) at 3600 rpm

 

[Photon440]

6.77047936 rounds up nicely to 6.8
Of course, 413 was rounded down; it actually calculates as 413.16 cubes which was the number used to calculate the 6.77 fraction.

 

[RemCharger]

The rear crank flange could be different. Might want to make sure you know what's usable before ordering or planning.
Could just be the bare block

 

[ckessel]

FYI. What you have there is not a passenger car 413. Its the 413 Industrial that was used in RV's, wind machines, water pumping etc usage. Its a critter all by itself.

 

[69Bee]

FYI. What you have there is not a passenger car 413. Its the 413 Industrial that was used in RV's, wind machines, water pumping etc usage. Its a critter all by itself.

Block should be the same, Crank will be longer likely, but the mains should be the same. Rods/pistons/rod bearings will be the same. heads have water ports in the end, but any BB head, except Hemi of course, will fit. Intake should work on later heads I believe. Short of pistons, most all of the other internal parts are the same as a 440, so that should open up the search field.