C3 Tech/Performance V8 Technical Info, Internal Engine, External Engine, Basic Tech and Maintenance for the C3 Corvette
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Old Aug 12, 2009 | 12:17 PM
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Can someone answer this for me ?

Does the 1971 / 1972 350Cu L48 Engine feature 2-bolt main's or 4-bolt mains ?
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Old Aug 12, 2009 | 01:31 PM
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From: Hayward Wi
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Many variants followed:

* L48

Years: 1967-1980

The L-48 is the original 350 cu in (5.7 L), available only in the Camaro or Chevy II/Nova in '67 & '68. In '69 it was used in almost everything; Camaros, Corvettes, Impalas, El caminos ,Chevelles & Novas. From '75-'80 it was available only in the Corvette. L-48's use a Hyd Cam, 4bbl Qjet, Cast pistons, 2 bolt main caps, "Pink" Rods, #0014 Blocks & #993 heads. Power output ranges from 300HP(gross) down to 175HP(net).

The L48 was the standard engine in the 1971 Chevrolet Corvette. It produced 270 hp (201 kW) and 360 lb·ft (488 N·m) with an 8.5:1 compression ratio.

The 1976-1979 L48 was the standard Corvette engine and produced 180 hp (134 kW) and 270 lb·ft (366 N·m). The 1980 L48 stood at 190 hp (142 kW) and 280 lb·ft (380 N·m) from 8.2:1 compression.

In 1972 the only way to get a L48 (4bbl V8) in a Chevy Nova was to get the Super Sport Package. This is indicated by the 5th digit in the VIN being a "K". 1972 was the only year you could verify the Super Sport package by the VIN.

In 1973 the "L-48" had cold air induction (throttle activated) and developed 190 hp (142 kW) (net). Beginning in 1974 the hp was reduced for several years until it reached a low of 165 hp (123 kW) (net) in 1975, before rising again.
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Old Aug 12, 2009 | 06:43 PM
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Originally Posted by Blu72
Can someone answer this for me ?

Does the 1971 / 1972 350Cu L48 Engine feature 2-bolt main's or 4-bolt mains ?
L48s came with two bolt mains, cast iron crank, cast dished pistons.
76cc chamber heads 194/150 valves, hydraulic 195 .050 intake duration 390/410 valve lift.
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