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#1 |
Registered User
![]() Join Date: Dec 1999
Location: Modesto, CA
Posts: 565
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how big is your cam?
ive got a crane powermax cam and all the papers that give me that lift and durations, and loads and all that. but whats the one number that people use when tellin exactly what size it is, hence, how big of a difference it makes?
i dont think mine is too big, but the lift is 3027 intake and 3200 exhaust, with a rocker arm ratio of 1.5, advertised duration is 272? intake, and 284? exhuast.
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Current owner of 2016 2500 Silverado Midnight Edition. Former owner of: 69 1/2 ton, change from long/fleet to short/fleet, shaved door handles, shaved tailgate, 4/6 drop, power windows, 700r4 72 blazer, 350 with Holley Commander 950 DFI, crane energizer cam, 350 tranny, dual sanderson blockhuggers/magnaflow exhaust |
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#2 |
Suburbans RULE!
Join Date: Jan 2000
Location: Clinton, IA 52732
Posts: 689
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The most common way to talk the "cam talk" is by valve lift and duration at 0.050 lift. The valve lift is a constant number between cam manufacturers but the duration numbers can be different. Some companies rate the duration at 0.050 lift or 0.006 tappet lift. So that can make comparing cams a little difficult because they aren't using the same parameters.
But if someone were to ask how big your cam is, you would say: 0.454 Intake / 0.480 Exhaust lift with 272/284 advertised duration.
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--Ben 71 GMC Suburban 4X4 The "Beast" 388 CID Stroker, TH350, NP205, 8-lug D44, 14BFF w/ Detroit, 4.10:1 gears, 4-Wheel Disks 4" Lift, 35" MT/R's. |
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#3 |
Registered User
Join Date: Dec 1999
Location: Austin, TX, USA
Posts: 7,721
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Beast is correct, but to clarify a little... Talk about cams duration at .050 tappet lift, but valve lift should be specified at zero lash for a hydraulic tappet and net lift if mechanical or the valve lash should be specified if quoting gross lift figures.
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44 Willys MB 52 M38A1 64 Corvette Coupe 68 Camaro 'vert LT1 & TH700 69 Z/28 355 12.6's @110 69 Chevy Short Step 4 1/2"/7" drop 72 Jimmy 4WD 4spd 4" & 35's 02 GMC 2500HD 4x4 Duramax |
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#4 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,693
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My cam is about 2 feet long...give or take.
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#5 |
Account Suspended
Join Date: May 2002
Location: Olathe, Kansas
Posts: 929
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lol u goof! :p
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