The duration at.050 lift (intake/exhaust) is 254/254 degrees, and the valve lift is.485"/.485". Duration at .050" Cam … When a Corvette pulls up to a traffic light, heads turn, and when they pass a passerby, eyes follow. 3) specs. Photo Details: The team removed the L82 cam, heads, and intake to make way for the the Comp XE274H camshaft with.490 lift, 230/236 duration, and a 110 LSA, RHS aluminum heads, and a dual plane high rise intake manifold. Corvettes have always had a history of high performance. © 2020 COMP Performance Group. Whether you are using this for racing capabiliti… In addition, because of the aluminum construction, the RHS heads are lighter weight and have a reduced chance of detonation. The subsequent year, the L81 was the only engine available also. ch_color_title = "0000CC"; Cylinder head Casting Symbol (double pyramid). The engines next run on the Dyno proved the teams efforts to be fruitful, with 414 HP and 415 Lb-Ft of torque. However, as the L82 peak torque is hit at about 1000 RPM higher than the L48 I wondered if part of the issue could be a poor match between the engine torque curve and the torque converter in the 350 TH transmission. 55-82 283/327/350 Timing Chain Cover Gasket Kit . Engine Suffix & Partial VIN - 1973 Z28 Be the first to review this product . COMP Cams® Hustler™ Valve Springs for GM 603/604 and CT525 LS-Based…, TCI® SFI 29.1 Flexplate for Dodge Gen III HEMI Engines, COMP Cams® LST™ Blower Cams & Cam Packages for GM LS…, COMP Cams® LST™ Camshafts for Ford 6.0L/6.4L Power Stroke Engines, Attitude Adjustment: Valve Lash for Power, FAST Tests XFI Sportsman in Lucas Oil Modified, FAST Announces Revolution Award For NSRA Events, TCI Shows Machined Flexplate Manufacturing. Lobe centerline is 114. ch_color_bg = "FFFFFF"; Cylinder heads have double pyramid casting mark. Item #: EN-144 . Cam specs: Hydraulic, Lift: .450/.460 (intake/exhaust), Duration: 346/360 (i/e), with 1.5 rockers. Image is for illustrative purposes only. The corvette of 1973. All rights reserved. if a specification seems to be wrong, please tell us Distributor Note: 3123 Z28's were built after January 74 with the HEI distributor. Place cam follower on second step of cam next to high step. Car and Driver (September 1973) obtained a (1/4) quarter mile time of 15.2 seconds and 0-60 mph in 6.7 seconds. $15.99. Richard first installed a 350ci SBC on the Dyno. Engine block: Nearly every 350 you'll come across is casting # 3970010, some are 2 bolt, some are ch_client = "nastyz28"; These improvements added another 10 horsepower to the L82 engine. Engine Specs Type: V8 Valve Location: In Head Bore / Stroke: 4.00" / 3.48" (Standard, L82 350 Cubic Inch) Displacement: Standard, L82 Engines: 350 Cubic Inches Compression Ratio: 8.5:1 (Standard Engine) 9.00:1 (L82 Engine) Crankshaft Material: Forged Steel Camshaft Material: Cast … 1979 Corvette Specifications - 1979 Corvette Spec Sheet. Orders may take longer than usual to process due to manufacturers having issues receiving and shipping parts. Quote Factory Cam Specs (6/7) 2/6/07 12:22am. Engine Specs Type: V8 Valve Location: In Head Bore / Stroke: 4.00" / 3.48" (Standard, L82) Displacement: Standard, L82 Engines: 350 Cubic Inches (5.7 Liters) Compression Ratio: 8.2:1 (Standard Engine) 8.9:1 (L82 Engine) Cylinder Head Material: High Chrome Cast Alloy Iron Cylinder Block Material: Cast Alloy Iron Close choke by pushing upward on choke coil lever. The L48 possessed a cast crank, two-bolt mains and a cast-iron intake manifold. ch_height = 60; In fact the camshaft is identical. In … The Chevrolet Corvette C3 L82 has a naturally aspirated eight cylinders in V longitudinal front engine providing a maximum torque of 366 Nm available from 3600 rpm and a maximum power outpup of 228 PS available at 5200 rpm transmitted to the 15 inch rear wheels by a manual 4 speed gearbox. My original question was the L79 specs. Show more Images Compare with another car. Chevrolet Corvette Stingray 350-4 V-8 Turbo-Fire 250-hp Hydra-Matic (aut. ch_color_border = "FFFFFF"; Remove gage. Add to Cart. Casting Number | 57-82 Hydraulic Engine Lifter Set (16) $69.99. The engines next run on the Dyno proved the teams efforts to be fruitful, with 414 HP and 415 Lb-Ft of torque. Chevy 283 327 350/350HP L46 L82 Hydraulic Flat Tappet Camshaft/Cam+Lifter CL Kit. ch_type = "mpu"; Thanks for the info. The 1973 & 1974 Z28 engine (L82) is similar to the LT-1 with the following EXCEPTIONS: the If you need to know if a part is in stock, please call prior to placing your order. Some late 1979 models were "upgraded" to the new 85 MPH speedometer that would be standard on the 1980 models. Cylinder head Casting Symbol (double pyramid) | Add to Wish List Add to Compare. this the Z28 had the same distributor as the 1973 Z28. The Z28’s L-82 was rated at 245 horsepower and 280 lb-ft of torque. Check the suffix code In Stock - Ships today if ordered by 3 PM ET. With a baseline established it was time for the upgrades. By 1981 the only powertrain combinations available to the Corvette was the new L81 with 190 horsepower. However there are many more considerations to be made about such a big decision that can make or “brake” a good engine build. 5. The upgrades not only dramatically increased the SBCs peak power but also the power output throughout the entire power band as well. The L82 exhaust pipes jumped to 2 1/2 just after the manifolds. By centering the water pump, it allows Gen. 4 high-mount air-conditioning and power steering pumps to be added. ch_width = 468; ch_color_text = "000000"; Their latest specs do not match completely with previous specs, so I do not know if they are different cams or if their means of measuring was that far off. to see what application the block is actually from. Some are regular, some are 010, some are 010/020 (10-20 blocks). The L82 engine option has a higher lift cam, special heads with larger valves and higher compression, impact-extruded pistons, a forged steel crankshaft, and finned aluminum rocker covers. This particular small block is an L82, the performance 350 offered in the Corvette from 1973-1982, prior to the introduction of Chevys fuel injection engines. The L82 used the same mufflers and tail pipes as the LS-4 big block. Chevrolet Corvette C3 350 L82 210hp Specs (1976 - ) Technical Specifications. The L82 had 2.02-inch valves and the L48 measures 1.94 inches. Since the engine in the car we are restoring is not a numbers matching engine, we decided to install a new GM crate engine instead. The automatic … $129.99. This camshaft kit is designed and manufactured by Crane Cam Co.®. I really did not ask for the cam timing specs directly. Make sure this fits by entering your model number. Related To This Item. All specifications, performance and fuel economy data of Chevrolet Corvette 350 V-8 L82 (164 kW / 223 PS / 220 hp), edition of the year 1978 since October 1977 for North America U.S., including acceleration times 0-60 mph, 0-100 mph, 0-100 km/h, 0-200 km/h, quarter mile time, top speed, mileage and fuel economy, power-to-weight ratio, dimensions, drag coefficient, etc. Including 3896962 - 69-81 L46 / L82 Camshaft- Small Block Chevy- Flat Tappet Hydraulic. GM 5.3 Liter V8 EcoTec3 L82 Engine The L82 is a 5.3 liter, eight-cylinder engine from General Motors used in pickup trucks. Your first post only listed the part number. The team removed the L82 cam, heads, and intake to make way for the the Comp XE274H camshaft with .490 lift, 230/236 duration, and a 110 LSA, RHS aluminum heads, and a dual plane high rise intake manifold. In 1980 the base L48 engine put out 190 horsepower and the L82 was rated at 230 horsepower. My guess is that Chevy would not have bothered putting a different stall speed converter into the transmissions of L82 equipped cars. Email. 1973 Engine Specs. The RHS heads not only offered more flow but also smaller combustion chambers. Speed Secrets: L82 Small Block Chevy Heads/Cam/Intake Upgrades! All Z28 blocks should be 4 bolt mains. Advertised Duration (INT/EXH) 270°/280°. ch_sid = "caminfo-468"; All aspects considered, these heads are a win, win, win. Combustion Chamber. To demonstrate the importance of choosing the right cylinder heads, Richard Holdener teamed up with Comp Cams and RHS to set up a test using a Chevy Small Block that has a reputation for using a poor head casting. The guy at Isky said he didn't have the complete specs for that cam so if Al grinds them all the time I'll probably give him a call. This occured before February 1973. This heavy-duty COMP’s option will give your engine all the horsepower and torquethat you are looking for in one affordable package. The 1975 Corvette underwent only minor changes from the previous year’s model, keeping the best features of its predecessors and improving in other areas. I need to get on Manny the machinist to get it done so I can find out if it is still good. ch_color_site_link = "0000CC"; It featured a 9.0:1 compression ratio, cast iron 882 heads, and a Quadrajet induction system. Not computer compatible. Although the cam is stronger in the L82, it’s physically identical to the L48. This “4 bolt mains” engine is very similar to the high performance L82 engine used in the Corvettes of that erra anyway. Pingback: L82 5.3L EcoTec3 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More - OnAllCylinders. 1973 Corvette Specs. CONTACT US WHEN READY TO BUY, SELL, LEASE, TRADE OR SHIP A CORVETTE 866-838-8363 - 866-VETTENET The exhaust manifolds and the intake manifold were the same on the L48 and the L82. THE VETTE NET - YOUR MODERN SOLUTION FOR ALL CORVETTE NEEDS. Run on the Dyno in the stock configuration with long tube headers it produced 313 HP @ 5,400 RPM and 355 Lb-Ft of torque @ 3,800 RPM. Compared to its predecessor the L83, the L82 has a different valley cover, centered water pump location, and exhaust system. The cylinder head casting #'s differed, but the combustion chamber was … intake manifold is cast iron with a Rochester quadrajet, the camshaft is hydraulic. 1982 Changes. 69-70 350/350hp & 73-80 L82 Hydraulic Camshaft. The 68 cam shown may actually be a non-Corvette item. Cam specs: Hydraulic, Lift: .450/.460 (intake/exhaust), Duration: 346/360 (i/e), with 1.5 rockers. Cam specs are APPROXIMATELY AS follows: Valve Lift (INT/EXH): .450/.461; Duration @ .050" (INT/EXH): 224 / 224; ADV Duration (INT/EXH): 291/287; Lobe Centerline (degrees): 114; Power Range (RPM): 1800-5200; This is the factory replacement cam for the 1973-'80 LT-1 and L-82 Corvette (OE #3896962). I am waiting for my block which is at Shavers Racing Engines. Qty-+ Add to Cart. When picking out cylinder heads to upgrade an engine, in general most people think in terms of flow. To adjust, bend tang on fast idle cam until bubble is centered. We are doing everything within our control to ship orders as soon as possible. I am sure if my question had been a litttle more pointed John would and could have cited the specs as he has done before. Performance for the 1973-1974 Camaro Z28 which was equipped with a 4-speed manual, was very good for the times. It also offered a healthy at the time camshaft with a .450/.460 Lift and 222 degrees of duration. 4 bolt main, suffix codes: CLJ, CLK, CLL, CLM, 2.02/1.6" Valves, 76.18cc, tapered spark plug, screw in studs & guide plates, symbol: vertical diamond, GM part # 3896962, Has oil shield, EGR, Intake Runners Numbered, Rochester Quadrajet 4BBL, Remote Automatic Choke, w/Automatic Trans, Rochester Quadrajet 4BBL, Remote Automatic Choke, w/Manual Trans, Single Point, Uniset contact, RFI shield, Vacuum, Lite Blue paint spot, 4 bolt main, suffix codes: CLK, CLJ, CMS, CMT, 2.02/1.6, 76.18cc, identical to 333882, except w/bigger valves, screw in studs & guide plates, symbol: vertical diamond, Identical to 1973, HEI after 1/74, Vacuum, Lite Blue paint spot. Adams' Apple Lifetime Member Moderator Send Private Message Duncanville, TX - USA Vette(s): #1-1974 L-48 4spd Cp Med Red Metallic/Black deluxe int w/AC/tilt/tele./p/w-p/b/ Am … The L82 had larger heads and valves, four-bolt mains, forged steel crank, different pistons and aluminum intake. I believe both cams are still available from GM and there are aftermarket replacements available but they are "old tech". Focusing on the impact made by the choice of the right heads, Richard explains the considerations made, on top of flow numbers, in the planning stages of the build. 4 bolt. Stock L48 cam specs are: Intake: 195 Duration @ .050" , Lift .390" Exhaust: 202 Duration @ .050" , Lift .410" Lobe Separation 112 Hope this is some use to you--Reply . Dashpot Adjustment. The difference between the two motors was the static compression ratio. The L82 used a "modernized" version of the old 350HP cam, PN 3896962, with 222*/222* Duration @ .050"; .450"/.460" lift and 114* LSA. With a curb weight of 3545 lbs (1608 kgs), the Corvette C3 350 L82 210hp has a naturally-aspirated V 8 cylinder engine, Petrol motor, with the engine code L82. Technical Notes: Basic rpm range is 4000 - 6800; and compression ratio is 11.0 - 12.5. As luck would have it, the L82 was equipped with the same hydraulic flat-tappet cam as the L46. Even though the upgrade test conducted does include a camshaft and intake upgrade as well, the main focus is the role a good set of heads plays in making real power. The 1973 & 1974 Z28 engine (L82) is similar to the LT-1 with the following EXCEPTIONS: the intake manifold is cast iron with a Rochester quadrajet, the camshaft is hydraulic.