Small Blocks

This is going to cover small blocks 318s - 360s. These are some combinations that I came up with on these engines, first the 318 and then the 360. You can use these specs. for the 340 also, but I would follow the 360 as it would be closer and have more like parts.

engine: 318
compression: 9.61
all accessories installed
Heads: quench type 318s (302s)
valves: int. 1.78/ exh. 1.50
Intake: aluminum single plane M-1 style
Carb: 780 vacume sec.
Exhaust: 1 5/8" X 34" length with full 2.5" exhaust rated @ 500 cfms
Camshaft: comp cam 292H .501 lift 244 @ .050 106/114 centerlines and a 110 lsa
Octane: 87

Peak HP: 346 @ 6000
ave. HP: 277
Peak torque: 355 @ 4500
ave. torque: 281

This is repsenative of the typical street 318 with some rump, this would be a good cruiser and light bracket engine.




Now for the 360

Engine: 360 .030
compression: 9.91
all accessories installed
Heads: typical 70s
Valves: int.1.88/exh. 160
Intake: M-1 single plane
Carb: 780 vacume sec.
Exh.: Hedders 1 5/8" with full 2.5" exhaust rated @ 520 cfms
Camshaft: Mopar P 4120653 .528 lift with 241 .050 duration solid with .026/.028 lash
Octane: 87


Peak HP: 341 @ 5500 rpms
ave. HP: 276
Peak torque: 372 @ 4500
ave. Torque: 292

This engine is typical of a 365 ci with a mild cam so to be very streetable. You could use this engine in light bracket racing and either engine should be able to put a 3100-3200 lbs. car in the low 12s or upper 11s if the chassis is right.



BJR Racing