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What’s the diff between l-48 @ l-82’s?

Posted: 8/16/06 12:21pmMessage 1 of 14

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timgman

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mexico, NY - USA

Joined: 7/10/2006

Posts: 90

Vette(s): 1977 corvette

I was wondering if these were different engines of different "intake/exhaust/muffler" setups...
any info would be interesting and informative to the list.
thanks.

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What’s the diff between l-48 @ l-82’s?

Posted: 8/16/06 12:55pmMessage 2 of 14

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Gunslinger

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Frederick, MD - USA

Joined: 9/8/2003

Posts: 3398

Vette(s): 1969 convertible L71 427/435 4-speed black interior

L82 has a 4-bolt mainbearing caps...L48 has 2-bolt mains, forged crank (L48 has cast crank), different intake, higher compression, different model Q-Jets. Depending on model year, the L48 has a single inlet air cleaner, the L82 dual inlet. Other differences but these are the major ones.

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What’s the diff between l-48 @ l-82’s?

Posted: 8/16/06 1:39pmMessage 3 of 14

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stevep316

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jersey city, NJ - USA

Joined: 11/30/2003

Posts: 372

Vette(s): 1979 corvette metallic silver/red leather interior

i was just gonna say the difference is 25 hp!

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What’s the diff between l-48 @ l-82’s?

Posted: 8/16/06 2:24pmMessage 4 of 14

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cthulhu

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Hot Springs, AR - USA

Joined: 4/24/2004

Posts: 3236

Vette(s): 69 Conv #'s match 427, TKO-600/.64, 3.36HD-Posi, HT, T/T, PS, PB, PW, SP, Leather, Comp XE264HR & Roller Rockers & Lifters, Air-Gap RPM intake, Holley St Av 770 VS, MSD 6AL+Dist+Blaster SS, K&N, Jet-Hot Hooker Side-Pipes, Steeroids, Al Rad, Spal Fans

[QUOTE=stevep316]i was just gonna say the difference is 25 hp! [/QUOTE]

I dont mean to offend anyone... but neither one was very impressive in power...

if youre looking to buy either an l-48 or l-82 car.. I wouldnt worry about it.. youll need to tweak either one to make it respectable by modern standards and either one is a decent platform to build from.

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What’s the diff between l-48 @ l-82’s?

Posted: 8/16/06 7:00pmMessage 5 of 14

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Adams' Apple

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Duncanville, TX - USA

Joined: 11/8/2003

Posts: 22720

Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am-Fm/map light National/Regional/Chapter NCRS "Top Flight" #2-1985 Bright Red/Carmine Cp.L-98/auto Member: NCRS, NCRS Texas, Corvette Legends of Texas

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Joel Adams
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"Money can't buy happiness -- but somehow it's more comforting to cry in a CORVETTE than in a Kia"

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What’s the diff between l-48 @ l-82’s?

Posted: 8/16/06 8:43pmMessage 6 of 14

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suncountry

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Moses Lake, WA - USA

Joined: 4/16/2005

Posts: 2134

Vette(s): 1976 L48 4-spd, Mahogany Metalic exterior, Buckskin interior 350ci/350hp, 3rd owner, fiberglass spring, 255/50-16's Torq-Thrust II

I have a stock L48 except for true duals which gives a couple of extra ponies. But definitely needs a lot more!

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What’s the diff between l-48 @ l-82’s?

Posted: 8/19/06 8:30pmMessage 7 of 14

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aceinthehole

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Manteca, CA - USA

Joined: 11/20/2005

Posts: 3623

Vette(s): 1978,two tone,Metalic Rootbeer & gold 1975 L48 4 speed

I, personally have fallen in love with the stock 1978 - 1982 series. Of course you big block guys have gotten use to some awesome power but when you step from almost any other car into a C-3, even late 1970's, it feels as though your on top of the world. I constantly find people riding my bumper and I don't know why until I check the speedo, OOPS.... 45 mph, funny, I was flying down this road, in heaven,of course I live in Northern California and the roads are some of the best in the world . ( For corvette or motorcycle driving that is ).

Jimmy B.
Just can't wait to get on the road again.

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What’s the diff between l-48 @ l-82’s?

Posted: 8/20/06 7:08pmMessage 8 of 14

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Redwingvette

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Waterford, MI - USA

Joined: 9/13/2002

Posts: 1795

Vette(s): 1973 Red coupe

Here is info I have on the 73.
Engine 1973 L48
HorsePower (Net Ratings) 190@4400
Torque (Net Ratings) 270@2800
Block Casting # 3970010
Block Type 2-Bolt Mains
Rods Drop forged steel
Crankshaft Nodular iron
Pistons Cast aluminum alloy
Compression 8.5:1
Heads Casting # 3998993
Heads (Materal) High chrome cast alloy iron
Valve Lifters Hydraulic
Camshaft .390/.410 lifts195/210 duration116 lsa
Intake Valves 1.94
Exhaust Valves 1.50
Exhaust System 2.0"
Intake Manifold Cast alloy iron
Exhaust Manifold Cast alloy iron
Balancer 6.75"
Distributor 1112098
Carburetor Q-jet
Tach Redline 5300

Engine 1973 L82
HorsePower (Net Ratings) 250@5200
Torque (Net Ratings) 285@4000
Block Casting # 3970010
Block Type 4-Bolt Mains
Rods Drop forged steel
Crankshaft Forged steel
Pistons Alum. impact extruded
Compression 9.0:1
Heads Casting # 330545
Heads (Materal) High chrome cast alloy iron
Valve Lifters Hydraulic
Camshaft .450/.460 lifts222/222 duration114 lsa
Intake Valves 2.02
Exhaust Valves 1.60
Exhaust System 2.5"
Intake Manifold Cast alloy iron
Exhaust Manifold Cast alloy iron
Balancer 8.00"
Distributor 1112130
Carburetor Q-jet
Tach Redline 5600 w/AC6000 no AC
The exhaust manifolds and the intake manifold were the same on the L48 and the L82. The L82 exhaust pipes jumped to 2 1/2 just after the manifolds. The L82 used the same mufflers and tail pipes as the LS-4 big block.

Brian - NCM Lifetime Member

73 coupe L48, Flat-top pistons, Performer RPM Heads, Crane Cam and roller rockers, Holley 650 vac sec. Performer intake,
3.55 gear BTO 200-4R trans,
Leather seats, Seatbelt Plus 3point seatbelts, Pioneer CD player
Magnaflow Exhuast System

Dewitt radiator and dual electric fans

Borgeson Steering box