View Full Version : Help ID this cam
turtle
03-31-2012, 06:11 PM
I had my supposed lt4 hot cam speced and it doesn't seem to match so checked lt4 nope not that and it's not an lt1. am I reading the sheet wrong or is this used cam just worn out and no good here is the spec sheet
http://i61.photobucket.com/albums/h60/alterchristopher/corvette/563e20b2.jpg
Asked this on ls1 tech as well just want to see what you guys think
97firehawk
03-31-2012, 10:31 PM
492 is the hot cam lift with a 1.5 to get 525 it uses a 1.6 contained in the rocker arm box.
LT4 HOT CAM CAMSHAFT SPECIFICATION CARD (CAM CARD) GENERAL SPECIFICATIONS Part Number: 24502586 Engine Application: SBC - Gen 1, Gen1E, and Gen 2 1986 to present. Lifter Type: Hydraulic Roller Engine RPM Range: 1500-5500 Grind Number: Not Available Serial Number: Not Available ADVERTISED CAMSHAFT SPECIFICATIONS INTAKE: N/A N/A Clearance Hot: N/A EXHAUST: N/A N/A Clarence Hot: N/A The specifications listed above are based on a rocker arm ratio of -.-- IN -.-- EX RECOMMENDED VALVE SPRING INFORMATION Part #: 12551483 Single: X Dual: Triple: Outside Diameter: 1.32” Pressure At Installed Height: 101 lbs. Installed Height: 1.780” Valve Spring Seat (shim): 10212809 Solid Height: 1.215” Valve Spring Retainer (cap): 10212808 Information For degreeing cam and correct only at .050” tappet lift INTAKE Opens: N/A Closes: N/A EXHAUST Opens: N/A Closes: N/A These specs are for cam installation at 109 intake centerline LOBE SEPERATION 112° DURATION AT .050” (Duration measured @ cam lift.) Intake: 219° Exhaust: 228° DURATION AT .006” (Duration measured @ cam lift.) Intake: 272° Exhaust: 281° LOBE CENTERLINE Intake: 109° Exhaust: 115° LOBE LIFT Intake: 0.328” Exhaust: 0.328” GROSS VALVE LIFT (1.6 Ratio Rockers) Intake: 0.525” Exhaust: 0.525” GROSS VALVE LIFT (1.5 Ratio Rockers) Intake: 0.492” Exhaust: 0.492” VALVE ADJUSTMENT Intake: Zero Lash Exhaust: Zero Lash NOTES A Valve Spring Kit is available as P/N 12495494 and includes 16 of P/N 12551483 valve springs. A Valve Spring Retainer (Cap) Kit is available as P/N 12495492 and includes 16 of P/N 10212808 valve
turtle
04-01-2012, 12:38 AM
Ok thank you I just wanted to check with you guys as well cam will be going vette soon got it for free with the 1.6 rockers I just need to get some good springs for it
Bersaglieri
04-06-2012, 03:46 PM
Hotcam 272/281 218/228 .492/.492 112LSA. You've got 275/278 220/226 .492/.492 111LSA. It's close to a Hotcam, I'm not sure how accurate those cam doctor programs are. Is the cam supposed to be a Hotcam or is it a Hotcam "copy"? Hotcams are billet, so that's usually a good way to define one.
-Dustin-
95ImpySS
04-06-2012, 04:12 PM
What does it say on the front of the cam. Where the dowel pin and sprocket attach...
joelster
04-06-2012, 06:16 PM
According to the data from your cam analyzer it is 219.9/225.5@.050" duration which is damn close to the advertised of the hotcam 218/228. Lobe lift is dead on.
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