We compared these specs to the catalog and because there is no list number on the end of the cam, we will assume this was a custom-ground camshaft. Hope we’ve helped you with a little more camshaft knowledge. Often roller cams will be made of steel and will be shiny instead of a flat black/gray color of a flat tappet cam caused by the anti-wear treatment it is given. Rear cam bearing journal is etched/engraved “Fessler Killer Cams #38” Any info is appreciated. That gives us our first clue where to look for the rest of the numbers.
Some enthusiasts just compare the opening and closing points of the intake with the cam card but this isn’t as reliable as the intake centerline method. GM/Crane non-emissions vehicles & off-road, 2001 5.7L LS6, 1X RELUCTOR, 3-BOLT SPROCKET, 1997-99 CORVETTE 5.7L LS1, 1X RELUCTOR, 3-BOLT.
Optional camshaft number requirements are listed at the link in Resources. 52.01.07 The markings on end of cam is 300C6 and X6733. Find the exhaust number and add it to the end of the list of numbers.
I have a fessler roller cam trying to identify the grind specs. The greater number of degrees means there is less overlap between the intake and exhaust lobes. The only thing we don’t know from these number is the cam’s intake centerline. The next information engraved on the cam was HR 114. The 3709/3711 numbers are references to lobe designs. Pingback: PERFORMANCE PARTS | My great WordPress blog, it seems like you can barely write,you need education, I bought pair of cams for my 99 mustang 4.6 i was told they are stage 2 cams but i wanted to be sure before taking old ones off can u please help me identify them will they improve my pony thank u very much sir.
This number should be on your camshaft, followed by a number of degrees. Your email address will not be published.
When referring to LSA’s, the larger the number, the more degrees of separation between the intake and exhaust lobes. Depending on the model of vehicle, you may also need an exhaust grind number, which will be … These spec are for cam install @108 intake ctr line duration @.050 intake 236 ext 242 lobe lift .3470in .3600 ext lobe selection 112.0 where do I set my timeing for first start ? Copyright 2020 Leaf Group Ltd. / Leaf Group Media. On the home page, we looked for the “Information” tab and then clicked on “Catalogs”. For as simple as this product appears, it is actually a very complicated piece of engineering if you study it closely. Number Manufacturer Years Cid Lift Lsa Icl Duration Lifter Notes ; 1: 10134334: Chevrolet: … Add the two numbers together and divide by 2. For example, you might have a camshaft stamped with the numbers 899C, followed by various numbers with degrees. Once we found the hydraulic roller section, the first column lists each lobe by number.
The 3709 lobe is listed as 265 degrees of advertised duration with 212 degrees at 0.050 and 0.328-inch lobe lift. Learn how your comment data is processed. Then do the same process with the lobe at 0.050 on the closing side. back of cam has 660 371079 front of cam has s42008L, i have a 572 hemi and i am in the process of pulling the cam but the harmonic damper is being a pain . With thousands of active lobes in the COMP library, the combinations are infinite for any given engine. Less overlap generally produces a more stable idle while more overlap makes the idle lumpier. In the catalog, you will see the cams listed by configuration starting with flat tappet hydraulics and then hydraulic rollers–which is what we want. Grind numbers are HR 224/339. Required fields are marked *. 25-12. 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 …. If you need a new camshaft, it can be a bit confusing to put together the identification number of the camshaft you need for your car. Other examples include small block Chevys -12, big block Chevys -11, and 5.0L small block Fords -35. For example, you might have a camshaft stamped with the numbers 899C, followed by various numbers with degrees.
The second lobe number 3711 refers to the same family of lobes–this one spec’d at 269 degrees advertised with 216 degrees at 0.050-inch tappet lift with a lobe lift of 0.330 and a theoretical valve lift of 0.561-inch. We investigated a couple of our Comp off-the-shelf LS cams and found they were ground with 5 degrees of advance, but that is no guarantee that your camshaft is ground that way. Find the exhaust number and add it to the end of the list of numbers. This requires a little more time but COMP does not charge extra, which is a great service if you are into tweaking the cam a bit to do something special. This advances the intake centerline by that number of degrees. Under that heading toward the bottom we found a tab for the Cam Lobe Master Catalog. COMP Cams uses two-number designations for all its engine families. The end of the cam is stamped 3709/3711 HR 114 followed by CC and 7661-11. 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. If the number was 110 degrees, this would increase the amount of overlap. Trying to find the specs on this camshaft. The HR refers to this as a hydraulic roller camshaft while the 114 refers to the lobe separation angle (LSA). i have a 383 chev engine ibought and would like to know what cam is in it. Stamped numbers are 529506 and 031531.
Ask Away! The camshaft is an important part of your vehicle; it helps certain elements of your car run smoothly, from regulating the timing of your valves to bringing in fresh air to kick out exhaust. 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. For instance, the number for a Toyota 3SGE would be CS 3SGE. Take the 899C and add it to the model prefix. i have some stamps on the cam that i can see EP236 and CWC can these be used to idetify the cam. Telling one from the other visually is relatively easy. In the image on the left is a hydraulic roller cam, the rounded lobes are readily appearant compared to the flat tappet cam to the right of it. Locate the ID number on the camshaft. The 3709/3711 numbers are references to lobe designs. Jeff Smith: First of all, the CC refers to COMP Cams. This will give you the intake centerline. Other examples include small block Chevys -12, big block Chevys -11, and 5.0L small block Fords -35. cs1563l crk2090b e-1563 r607011 h10528l 17-621 cam140l cam -1.625 -37sp -16-1/8in early/ crk2122b late cs1564r crk2090b e-1564 r607012 h10529r 17-620 cam140r cam -1.625 -37sp -16-1/8in early/ crk2122b late cs1584r e-1584 h10817r17-624 cam108r camshaft cs1585l e-1585 h10816l 17-625cam108l camshaft To submit your questions or ideas, or to simply learn more about It Still Works, contact us. can you help me to decode this cam . 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. The 7661-11 is a serial number specific to that camshaft only. 1998-2000 CAMARO/FIREBIRD 5.7L LS1, 1X RELUCTOR, 1999 4.8L LR4 AND 5.3L LM7, 1X RELUCTOR, 3-BOLT, 1999-2000 6.0L LQ4, 2000-07 4.8L LR4, 2000-07, 2000 CORVETTE 5.7L LS1, 1X RELUCTOR, 3-BOLT, 2002-05 5.7L LS6, 1X RELUCTOR, 3-BOLT SPROCKET, LT4 H.O.T crate motor cam, use w/1.6:1 roller, GM 350 HP Cam, RPM Range: 2200-5200, Rocker Ratio, ∀A Stamped between gear and first journal. 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. All you have to do to determine valve lift is multiply the lobe lift times the rocker ratio. The LS engine is designated 54 and this number is generally the first two numbers that define the actual cam part number. This article was written by the It Still Works team, copy edited and fact checked through a multi-point auditing system, in efforts to ensure our readers only receive the best information. It is typically located in the center of the cam between the lobes. If your camshaft is for a custom vehicle or alteration, you may need to get even more specific. I purchased a used hydraulic roller camshaft from a friend that was originally used in an LS1 engine.
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