Whats the Difference Between the 1978 L48 and L82???
07-04-2010, 04:11 PM
#1
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Whats the Difference Between the 1978 L48 and L82???
Other than the dual snorkel intake...what are the differences between these two GM 350's that would account for such a substantial horsepower increase with the L82?
07-04-2010, 04:51 PM
#2
Le Mans Master
L-82:
4 bolt mains
Forged rotating assembly (more rpm)
Higher compression ratio
Bigger cam
Bigger valves in heads (2.02 intake, 1.60 exhaust)
L-48:
2 bolt mains
Cast rotating assembly (less rpm)
Lower compression ratio
Smaller cam
Smaller valves in heads (1.94 intake, 1.50 exhaust)
Complete different motor under than air cleaner.
4 bolt mains
Forged rotating assembly (more rpm)
Higher compression ratio
Bigger cam
Bigger valves in heads (2.02 intake, 1.60 exhaust)
L-48:
2 bolt mains
Cast rotating assembly (less rpm)
Lower compression ratio
Smaller cam
Smaller valves in heads (1.94 intake, 1.50 exhaust)
Complete different motor under than air cleaner.
