gm camshaft identification numbers

Chevy V8 Casting Number Locations. Good Day: Re: camshaft identification. Melling listings include OEM applications to match the engine requirements desired including horsepower, economy and needed engine torque. Small Block Crankshaft Casting Numbers Lookup Type your crankshaft casting number in the SEARCH BOX below. 0967 is the last four digits of the GM part number. One of these cams looks unused and the other at best slightly used. The ID number will consist of either eight or nine digits; the last four numbers identify the cam and its specific application. Discussion in 'The Hokey Ass Message Board' started by indestructableforce, Nov 13, 2012. In 1998, head c/n 24575507 arrived with a heart-shaped combustion chamber against a D shape. I am partially colorblind so they may be sort of tanish as well. Thanks, Your email address will not be published. JAMSI is a trusted source of automotive engine parts. Under that heading toward the bottom we found a tab for the Cam Lobe Master Catalog. I was pretty careful with the float settings etc and it fired right up when put back on! Each number has a meaning and an interpretation. I did a search as well, google and on here. Small Block Chevy Factory Camshafts . Thank, Ray. How Long Does it Take Transmission Fluid to Circulate? Can I Sell a Car if the Title is not in my Name? The pushrods cam stays above the cylinder, which is always above the combustion chamber. intake and 1.72 in. The numbers engraved in the body part of the camshaft are called the Stamped number or casting number. **Due to the COVID-19 pandemic a large number of products are on backorder and shipping times are longer then usual. I only put the numbers here that I can prove, so this is a short list. Can you guys help me pick a cam and fix my combo? i have removed camshaft welsh plug to see numberbut cant identify numbers help would be appricated.i nee to see what size converter i would need.numbers on cam end are z102 and also 14p. A SOHC allows at least 2 to 3 valves per cylinder configuration, with more manufacturer prowess. Any advice? 4485B 4391B HR112+4 R (with a line under the R ) then CC and at the bottom G1979-14. In 1967, it was the cam for the 283/195hp; 327/210hp, 275hp, 300hp; and 350/295hp. Sept. 2019 Drag-Week Winner - N.Y. Legal Streeter - 1956 Chevy Bel-Air, http://www.msnusers.com/Chrisjunque/shoebox.msnw?action=ShowPhoto&PhotoID=2. CAM 6930 1967 CAMSHAFT ID. Camshafts come in a wide array of variations, and Chevrolet has a range of camshafts for different applications, engine sizes and performance specs. 1970 Mustang Mach I "Synergy Green Pearl"351 Cleveland - Fuel Injection "The Rattle Shaker" Complete nut and bolt rotisserie restoration LESS than 500 miles by C.A.R.S. the 4.3L LT1 was also referred to as the L99 (not to be confused with the LS variant bearing the same name) I have a Street Performance comp cam that was purchased in 2007. Chevy . The 4 digit ID on the camshaft core is 1529, which if correct I believe is for a 327 engine. From the distribute drive gear down are the folloing markings: CWC, 06, C14, EP1. The engine also had smaller 1-1/8? In the catalog, you will see the cams listed by configuration starting with flat tappet hydraulics and then hydraulic rollerswhich is what we want. journal.3.00" stroke3876768.283.forged..small journal.3.00" stroke3884577.327.forged..small journal.3.25" stroke3892690.350.forged..medium journal3.48" stroke3911001.307,327cast.medium journal3.25" stroke3911011.307,327cast.medium journal3.25" stroke3914672.327.forged..medium journal3.25" stroke3923279.302.forged..medium journal3.00" stroke3932442..267,305,350..castmedium journal3.48" stroke3941174.307,327cast.medium journal3.25" stroke3941178.302.forged..medium journal3.00" stroke3941182.350.forged..medium journal3.48" stroke3941188.350.forged..medium journal3.48" stroke3949847.283..forged or cast..sm. The 3709 lobe is listed as 265 degrees of advertised duration with 212 degrees at 0.050 and .328-inch lobe lift. It is typically located in the center of the cam between the lobes. Despite the differences, however, an 8.1L camshaft will drop right into a 454 like it belongs there - but it will only run four cylinders. Old school Comp 9000 Mallory Distributor and coil. They dont add to the function of the camshaft itself. While a simple call to the COMP Cams CAM HELP tech line (1-800-999-0853) and short discussion with one of the highly informed tech line personnel will always get you the right answers, having a little personal knowledge on the topic is always a good idea. How to Get a California Drivers License with an Out of State License, Can You Register a Car Online in Florida? The GM tube has the ID number as 3863151 which correlates to a L79 Cam however the stamping at the end is 920883. However, remember what to do after replacing your camshaft sensor in your car to avoid another frustration. This is what is on the cam, it would not let me past a picture here. The essence of knowing how to identify your camshaft makes it easy to avoid errors, unnecessary bills, and frustrations that come along with having the wrong camshaft. side, aluminum1011081091-up350.Gen. 1, 65cc chambers1012092887-953501012532094-96350.Gen.II LT1, cast iron version, used on "9C1" Police package, Impala SS, Cadillac Fleetwood, Buick Roadmaster reverse flow cooling 1012837492-up350.Gen.II LT1, 53cc, angle plug, aluminum, reverse flow cooling, 175/68cc ports10134352Bowtie, 45cc, angle plug, "low" port, 223cc intake port,aluminum, 18' race head10134363NOTE: This casting # has been used in many different versions of this aluminum 18' and 15' Bowtie race head. Rear cam bearing journal is etched/engraved Fessler Killer Cams #38 Any info is appreciated. DOHC is a production to improve the volumetric of the internal combustion engine in which it has more power than a simple overhead cam. CWC is the foundry that cast the cam blank. Chevy V8 "W" Motor 348-409 Casting Numbers. I purchased a used hydraulic roller camshaft from a friend that was originally used in an LS1 engine. Car AC Compressor Not Turning On (Causes and Quick Fix). Every engine needs a timing device that can control the opening and closing of the intake and exhaust valves. Displacing 2.4 liters in an inline-four configuration, the LEA is part of the Ecotec engine. Also there is a Blue dot just under the distributor drive gear. If you notice any mistakes or have any additions, use my contact me form and let me know so I can update the list. On the home page, we looked for the Information tab and then clicked on Catalogs. cam 5054 i am still searching for "Three Rules of Work: Out of clutter find simplicity; From discord find harmony; In the middle of . If we didnt already know this was an LS cam, the first thing we would want to do is determine the engine family. Learn how your comment data is processed. E Crankshaft Identification Use these casting numbers to identify the crankshaft you have. CAST3736098. A good understanding of these factors will assist you in making a wise decision. The Fora platform includes forum software by XenForo. Step 1 Find the model prefix. I was given a can that has the #s We continued down the list until we found the 3709 number, which because it is listed first on the camshaft, is the intake lobe. My 1968 Camaro Site. (You must log in or sign up to reply here. If you don't have the VIN, you can still identify the engine by visual inspection if you know what to look for. 1 BTC 42 ABC 223 30 BTC 80 ABC 290 .298 .447 114 1.5 HYD EXH. This will help you get the full details directly from the manufacturing, which requires the model and other factors that need attention. In 1967, it was the cam for the 283/195hp; 327/210hp, 275hp, 300hp; and 350/295hp. (Yes or No), Will Hub Centric Rings Stop Vibration? We found it under the heading of Xtreme RPM for LS1 lobes, Hi Lift. Can I Drive my Mercedes With Check Engine Light On? I have no idea whats on the inside. It would take some digging and some research, but you could look through a parts catalog of some of the more popular cam manufacturers and see if you can match up part numbers with something. ZL-1, 2nd version, Mark IV3955270.427.692 or 4 bolt3955272.396.692 or 4 bolt3955274.366T68-854-bolt3955276.427T68-734-bolt3963512.427.692 or 4 bolt3963512.454.70-762 or 4 bolt3969852.366T68-844-bolt3969854.396.692 or 4 bolt3969854.402.70-722 or 4 bolt3969858.427T68-844-bolt3999289.454.71-792 or 4 bolt, some "CE" replacement blocks had four bolt main caps3999290.396.68-692 or 4 bolt, Truck3999290.402.70-722 or 4 bolt, Truck3999290.402.722 or 4 bolt, Passenger3999293.366T68-904-bolt3999294.427T68-844-bolt100511074544-bolt, Bowtie, MkIV, 9.8" deck, siamesed bores, 4.25" semi-finished bores, can be bored to 4.50"10069282366T90-914-bolt, Mark IV, Tall deck10069284427T..4-bolt, Mark IV, Tall deck10069286454.90-914-bolt, Mark IV, Short deck10114182454.91-up4-bolt, Gen.V10114183366T91-up4-bolt, Gen.V10114184427T91-up4-bolt, Gen.V10134366454T..4-bolt, Bowtie, Gen.V, Tall deck101850504544-bolt, Bowtie, Gen.V, Short deck10237297454.96-up4-bolt, Vortec 7400", "L-29" Gen.VI10237299427T96-up4-bolt, Gen.VI, 7.0L, truck10237300502.96-up4-bolt, Gen.VI, 4.466" bore12550312427T96-up4-bolt, Gen.VI, 4.250" bore, fuel pump boss, clutch linkage pivot boss12550313454.91-up4-bolt, Gen.V crate motor, Gen. VI 4.25" bare block, fuel pump boss12556110496.01-up4-bolt, Gen.VII 8.1L, "Vortec 8100", Truck12561357454.96-up4-bolt, Gen.VI125613585024-bolt, Gen. VI14015443454.87-902 or 4-bolt, Mark IV, Truck, Motorhome14015445454.78-902 or 4 bolt14044807454T..4-bolt, Bowtie, MkIV, CNC prep, Tall deck, 4.25" bore or 4.495" bores, 191659554541996-2001 L29140968595024-bolt, Gen.V, HO245025044544-bolt, Bowtie, Gen.V, Race prep, 9.8 "short" deck height24502506454T..4-bolt, Bowtie, Gen.V, Race prep, 10.2 "tall" deck height245025724-bolt, 4.5" bore Olds DRCE 2, 9.5" deck height255344024-bolt, 4.590" bore Olds DRCE 3, 9.25" deck height. Stamped numbers are 529506 and 031531. PERFORMANCE PARTS | My great WordPress blog. In 1987, he assumed the role of editor for Hot Rod magazine before returning to his first love of writing technical stories. For online resources, check out NastyZ28.com, Kendrick-Auto.com or Chevy-Camaro.com which have detailed listings, or contact a Chevrolet parts department to identify the camshaft. These markings will usually be in the center of the camshaft, obviously in between the valve lobes. diameter 2. In 1969, it was the cam for the 307/200hp; 327/210hp, 235hp; and 350/250hp, 255hp, 300hp. They provide average torque to the valves. In 1967, it was the cam for the 283/195hp; 327/210hp, 275hp, 300hp; and 350/295hp. Don't forget to follow us on Facebook, and if you run a website or write for a blog, please link to our site! GM is recalling seven. Cam is in used shape but with little to no wear. They are the flat tappet and roller camshaft. motor could have casting number 10112391 or 10112391S that is the service replacement. The HR refers to this as a hydraulic roller camshaft while the 114 refers to the lobe separation angle (LSA). The suffix provides the. The HI-PO color coded stripes on the camshaft end are green, orange and red. GM 6930 , 6964 and 5054. i have a 383 chev engine ibought and would like to know what cam is in it. CHEVY BIG BLOCK V-8 Crankshaft Casting Numbers BBC TWO PIECE REAR MAIN OIL SEALS 3.76" STROKE used on '65-'90 Mark IV 366T, 396, 402, 427 or 427T 6223396,402,427.forged, 1053 steel 7115396,402,427.forged, nitrided, cross-drilled, 5140 steel 3804816..396,402,427.cast 3856223..396.forged 3863114..402. COMP offers this as a service to anyone who is looking for a custom combination of specs that are not listed as an on-the-shelf cam. It models the airflow for the computer to calculate fuel. And there is a CR inscribed as well off the lower left * 54-55 all 6 cyl except PG, 58 D-D 2 nd design,59 series 3, 60-62 series 10-30,60-61 fleetmaster exc. BBC Cylinder Head Casting Numbers RECTANGULAR PORT - Valve size 2.19 intake, 1.88 exhaust IP = Intake runner volume OVAL PORT - Valve size 2.06 intake, 1.72 exhaust BBC Camshaft Part Numbers Note 1: 80 deg overlap, 396 375hp L-78/L-89, 427 425/435hp L-71/L-72, 454 450hp LS-6, HP streetof engines we now know as Small Block Chevys. Using stamped numbers and. I have verified this information with a degree wheel and a dial indicator, 300 degrees @ 0.006 lift, 250 degrees @ 0.050 lift, lift is 0.266 or 0.399 at valve, and LSA of 11.5. Speed isnt a problem with a dual camshaft and it increases the engines power. 586 FM13 216 00L 1991 Z28 Engine: '94 355 LT1, GM hot cam, 1.6 RR's, Ported Heads, Dyno Don's headers, #30 SVO injectors, stock internals with skirted pistons. Does Your License and Registration Address Have to Match? We would like to thank everyone that has contributed to the data provided on this site. My buddy says its a mild cam thats bigger than a stock LS6 version, but he didnt have any more information. 366299.4Bowtie, Aluminum, nodular iron splayed caps, wet sump, 4.00" bore389257..302..67.2393288..28365-672460703..350..78.4460776..30578-792460777..30578-792460778..30578-792 or 4, some Canadian assembled heavy duty truck blocks have 4-bolt main caps471511..26779-8223556519.28358-6123703524.265..55.2No oil filter3720991.26556-5723731548.265572No side motor mounts3731548.283572No side motor mounts3737739.28358-6423756519.28358-6223782870.32762-6723789817.28362-6423789817.32762-6723789935.28361-6423790721.28362-642Chevy II recessed oil filter boss3790721.32765-662Chevy II recessed oil filter boss3791362.32762-672Chevy II recessed oil filter boss3792563.327..65.23792582.28364-6523794226.28358-6323794460.32762-6423830944.327..63.23834810.28364-6623834812.28362-6323837739.28358-6223849852.28357-6623849935.28365-6723858174.32764-6723858180.32764-6723858618.35068-7623862194.28365-672Chevy II recessed oil filter boss3862812.28362-6423892657.302..67.2Z-28 Camaro3892657.327..67.23892657.350..67.2Camaro3896944.28366-6723896948.28366-6723903352.327..67.23914636.307..68.23914638.307..68.23914653.30768-7323914660.327..68.23914678.302..68.2Z-28 Camaro3914678.327..68.23914678.350..68.23931174.307..68.2Truck3932371.30769-7323932373.30768-7323932386.302..69.4Z-28 Camaro3932386.327..69.23932386.350..69.2 or 43932388.327..69.23932388.350..69.2 or 43933180.32768-6923951509.40070-7143951509.40074-8023951511.40070-734Some replacement blocks had 2-bolt main caps3956618.302..69.4Z-28 Camaro3956618.32768-6923956618.350..69.2 or 43956632.307..69.23959512.32762-672Was also used for some "CE" replacement blocks3959532.283642Used for some "CE" replacement blocks3959538.327..2Chevy II recessed oil filter boss, Used for some Chevy II "CE" replacement blocks3970010.302..69.4Z-28 Camaro3970010.327..69.2Trucks and industrial3970010.35069-802 or 43970014.35070-762 or 43970020.30769-7323970024.30769-7324715111.305..80.26259425.35069-762, 95509..400.762 bolt have only seen one10036033350..4Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"10046164305..86.210049804..4Aluminum, Pontiac Super Duty version of Gen.I SBC, 4.00" bore, 350 mains, 2-piece rear seal, splayed caps, GTP race block10051182..2 or 4Bowtie, 3.75"-4.30" bores, 1 or 2-piece rear seal10051184..4Bowtie, 4.00"-4.155" bores, 1 or 2-piece rear seal1005472735086-up2 or 4one piece rear seal, some "Made in Canada"10066036350..2 or 4Target Master/Goodwrench crate motor, 2-piece rear, seal, "Hecho en Mexico"10066038350..92.4Goodwrench crate motor, 2-piece rear seal, "Hecho en Mexico"10090511350..90.2LT-5, ZR1 Vette, 375hp1012532735092-up2 or 4Gen.II LT-1, reverse flow cooling1012532735096-up2 or 4Gen.II LT-4, reverse flow cooling10134398..4Bowtie, Aluminum, 4.125" bore, 2.65" main journals10134996..4Bowtie, Aluminum, 4.125" bore 2.65" main journals1015355835091-924LT-5, ZR1 Vette, 375hp1016858826594-962L99, Gen.II, 4.3 Liter V-8, Caprice, reverse flow cooling1019900135093-954LT-5, ZR1 Vette, 405hp1024387830596-982Vortec truck, roller cam, one-piece rear seal1024388035095-002 or 4Vortec truck, Gen.I crate motors and "ZZ4", roller cam, one piece rear seal1255059235097-upcrossbolted block, Gen.III, "LS1", aluminum1255135899-upGen.III, 4.8L or 5.3L, cast iron, truck1255136436498-04crossbolted cast iron Gen. III, 6.0L, truck1255937835099-upcrossbolted block, Gen.III, "LS1", aluminum1255984635098-upcrossbolted block, Gen.III, "LS1", aluminum1256062135098-upcrossbolted block, Gen.III, "LS1", aluminum1256062635099-upcrossbolted block, Gen.III, "LS1", aluminum1256062935099crossbolted block, Gen.III, "LS1", aluminum1256116835001-upcrossbolted block, Gen.III, "LS1", aluminum1256217435098-upcrossbolted block, Gen.III, "LS1", aluminum1256895236405-upcrossbolted block, Gen.III, 6.0L, aluminum, LS21256691032504-upcrossbolted block, Gen.III, 5.3L, aluminum, SSR truck1257104832504-upcrossbolted block, Gen.III, 5.3L1257358136498-04crossbolted cast iron, Gen.III, 6.0L, truck1257718436498-04crossbolted cast iron, Gen.III, 6.0L, truck1257739602-upGen.III, 4.8L or 5.3L, cast iron, truck1401020130580-8521401020230580-8521401020330580-8521401020735080-852 or 41401020935080-852 or 41401028026779-822140110643508341401114835087-89.Roller cam, one-piece rear seal1401637626779-8221401637935077-792 or 41401638130580-8421401638230579-8421401638330580-852Truck1407928735086-90.Truck1408852635087-89.Roller cam, one-piece rear seal1408854835086-882 or 41408855130586-872one-piece rear main seal1409362730587-942Roller or flat tappet cam, one-piece rear seal1409363835087-952 or 4Roller or flat tappet cam, one-piece rear seal1409476630586-up2One-piece rear seal1410114730585-up21410114835086-904One-piece rear seal1410205830587-912Roller cam, one-piece rear seal22551656..4Chevy/Olds Rocket block, 4.00"-4.190" bores, 2.45" main journal sizes, splayed caps, dry sump, 2-piece rear seal, 9.025" deck22551660..4Chevy/Olds Rocket block, 4.00"-4.190" bores, 400 mains journal sizes, splayed steel caps, wet sump, raised cam 2-piece rear seal, 9.300" deck. It doesnt add to the function of the camshaft, nor does it play an important role. A DOHC is known as a dual overhead cam. Answer (1 of 4): Most common specs for an engine would be for example. It's real easy to spot if the heads are off because of the small 3.74" bore. order on 8.1L big block engines is different than a normal big block. . I know that Chevy Casting Numbers are on several sites on the World Wide Web but I thought it would be a good idea to list them here too. I have a cam trying to set startup timeing hr112 intake hyd .555 ext .576 duration .006 valve tapping lift 287 in 293 ex valve timing .050 open int 10 close btdc46 abdc exh :57 BBdc 5 ATC. I dont have any numbers. The duration at lash point in degrees (intake/exhaust) is 328/324; duration at .050" tappet lift (intake/exhaust) is 220/220; and . Crane makes Blueprint camshafts for almost, if not, every GM, Ford, Mopar engine from the sixties and seventies. With your cam it might come out to somewhere between 114 to 110 degrees depending on if the cam was machined with advance. Thank you in advance, Gday mate trying to decipher this comp cam to no avail, # 2-018b 1295 3106-rb 046987 any help on duration and lift lobe centre and rev range would be greatly appreciated. The recall affects several models of heavy duty Chevrolet Silverados and GMC Sierras with optional engine block heaters. JavaScript is disabled. Thank you, if you can help, send me an e mail and I will send you a picture. Any info helps, or where I can find. Casting numbers used on factory 366ci tall deck engines (some used on multiple engines): *ending 328: 1980 through 1991. How does this compare to the 69 dz 30/30/ cam? It's a stock cam. i have removed camshaft welsh plug to see numberbut cant identify numbers help would be appricated.i nee to see what size converter i would need. Any time you are making this kind of important decision about your engine, it's . Thank you ,This has been very helpful. It is an eight or nine-digit number. A Guide To Ford V8 Engine Block Casting Numbers, 1952-1996. Carb number is stamped in this location as well as on an identification tag held on with one of the air . On this cam card, you will see the LSA is 112 degrees. $510.45. This is the number of crankshaft degrees of separation between the intake and exhaust lobe center lines. Reading a Cam Card: Advance On the shaft the #'s 1539 are stamped in one spot, and CWC is stamped in another spot. The Chevrolet small-block engine is a series of gasoline-powered, V-8 automobile engines, produced by the Chevrolet division of General Motors between 1954 and 2003, using the same basic engine block.Referred to as a "small-block" for its size relative to the physically much larger Chevrolet big-block engines, the small block family spanned from 262 cu in (4.3 L) to 400 cu in (6.6 L) in . When referring to LSAs, the larger the number, the more degrees of separation between the intake and exhaust lobes. . In 1972, it was the cam for the 307/130hp; and an optional cam for the 350/165hp, 175hp, 200hp; and 400/170hp. Information is premium and can save you from errors and spending excessively. To avoid spinning, roller lifters are lifted together. Jeff Smith has had a passion for cars since he began working at his grandfather's gas station at the age 10. . I hope it helps you identify the Chevrolet engine parts you are working on. Many camshaft number reference sites exist online for V8 engines, but determining the camshaft specs for six- and four-cylinder engines may require contacting a Chevrolet parts department. The Chevy Big Block's Camshafts can be identified by a number that is cast or stamped and is usually located in between the CAM lobes. Trying to find the specs on this camshaft. It is a mode of identification used by manufacturers. They make castings for CMC (Camshaft Machine Corp.) and EPC (Engine Power Components) and others. The LS engine is designated 54 and this number is generally the first two numbers that define the actual cam part number. $426.78. In 1975, it was the cam for the 350/145hp, 155hp, 165hp; and 400/175hp. His work has appeared in the "New Haven Register," Medford's "Mail-Tribune" and the "Ashland Daily Tidings." Quick View. Chevy Intake Manifolds Are you a newbie in dealing with cars and you seem not to know how useful a camshaft is and what is used for? Could someone help me identify these cam numbers ? It is typically located in the center of the cam between the lobes. After working as a reporter in Oregon, he is now based back home in New Haven. One thing I"m trying to figure out is if the orig cam is still in the car. COMP Cams 12-600-4 Thumpr Cam, Small Block Chevy, 2000-5800 RPM. $799.00 +$36.00 shipping. Chevy V8 Crankshaft Casting Numbers. We have it in internal combustion engines and some electric motor speed controllers. All of these applications had the same specs as the initial 1967 application. Stamp numbers are engraved by the manufacturers to monitor production and distribution. For a better experience, please enable JavaScript in your browser before proceeding. In this case, we dont know what the opening and closing points are although you could compare the intake lobe points to an off-the-shelf XFI RPM Hi-Lift cam and probably be pretty close. side, aluminum1022512295350.LT5, ZR1, DOHC, 32-valve, pass. Some enthusiasts just compare the opening and closing points of the intake with the cam card but this isnt as reliable as the intake centerline method. We have a hint because if a camshaft if ground with no added advance, the intake lobe centerline will be the same number as the LSA114 degrees After Top Dead Center (ATDC). Installing a Timing Belt on Ford Ranger chevrolet image by Eduard Shelesnjak from, Copyright 2023 Leaf Group Ltd. / Leaf Group Media. I have this small block chevy the guy says is a 418 strocker a lifter lifted off at the track but now im looking at the cam and all it has on it is a S then another set of numbers is CH2 ..its a roller set up lifter ar comp cams and so is the rockers but i have no cam spec with car when i got it so im lost . There are at least 6 different versions as of 11/99. Come join the discussion about performance, builds, restoration, modifications, classifieds, troubleshooting, reviews, and more! The markings on end of cam is 300C6 and X6733. The car has all orig drive train, Except for fuel injection and headers. Since 2003, Jeff has held various positions at Car Craft (including editor), has written books on small block Chevy performance, and even cultivated an impressive collection of 1965 and 1966 Chevelles. Any help much appreciated. The 3709 lobe is listed as 265 degrees of advertised duration with 212 degrees at 0.050 and 0.328-inch lobe lift. There are two easy ways: 1. (Advanced five degrees; use spring P/N 3970627.) . But this comes at the cost of reduced torque in the middle of the rpm band. The numbers on it are, 3734R/3377R, HR13, I 3996-06. This type allows more direct airflow through the engine without having to deal with obstruction. For the intake centerline method, once the cam is installed and TDC is established on the degree wheel, then roll the cam around until the dial indicator signals maximum lift. Your camshaft is important; your engine isnt meaningful without the contribution of the Camshaft. (See below.) I tried searching & googling these markings with no luck. (396 BBC), Is this enough information to get the specs on this cam? In this case: 108 + 116 = 224 degrees / 2 = 112 degrees. To Develop Good Eye Habits While Driving You Should? It is 8 figured random numbers and sometimes 9 figures with the last 4 numbers identifying the specific function of the Cam Shaft. A native of New Haven, Conn., Floyd Drake III began writing in 1984. Each family of cam lobes has its own numerical designation with the same basic configuration, usually encompassing multiple individual durations that also might include changes in lobe lift. While these engines were based on the GM Family II engine, the architecture was substantially re-engineered for the new Ecotec application produced since 2000. This is a COMP Cams timing card. Quick View. The exhaust number also comes through some time, maybe if you see digits like 266/288; the second shows the exhaust number. The Fora platform includes forum software by XenForo. i have a 383 chev engine ibought and would like to know what cam is in it. Hey Keith, we did some quick sleuthing and your cam MAY be for a BBC Marine (boat) motor application thats been discontinued. I can quote you the numbers from the 1964 "Parts and Accessories Catalog" but, be aware that earlier numbers may exist and be superseded by the ones listed in this catalog. exhaust valves. The engine needs to function by opening the valve with the help of the camshaft. They are not so much of the speeding type. Now turn the engine clockwise and stop at 0.050 on the opening side of max lift and record the degree wheel reading.

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