 Mystery CAM - what can you tell me about this lift and duration |
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| Aaron Cox |
 Nov 4 2006, 08:47 PM
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Professional Lawn Dart  Group: Retired Admin Posts: 24,542 Joined: 1-February 03 From: Corona, CA Member No.: 219 Region Association: Southern California  |
friend here is buying another friends motor...
we went over and measure lift and duration with a dial indicator and a degree wheel... cam had overlap (visible - did not measure) which makes me positive its a carb cam... anyway... the specs (lift is +/- 3 tho) ___________ EXHAUST___INTAKE LIFT (valve) .410" ___ .422" Duration 165 deg 175 deg duration... we measured when it opened, and measured when it closed.... we got big numbers so we divided by 2 to get what we have above... not sure those are correct... but those numbers also coincide to half lift.... so raby/brett/clayton others... what can you tell me about this cam? does it fit a WEB/engle profile? motor was rebuilt many years ago... its a 1911.. and the cam definitely had visible overlap (both valves open for a few degrees, one closing, one opening) |
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| SLITS |
Nov 4 2006, 09:15 PM
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"This Utah shit is HARSH!" Group: Benefactors Posts: 13,602 Joined: 22-February 04 From: SoCal Mountains ... Member No.: 1,696 Region Association: None  |
1.) Was valve lift measured at the valve or lifter?
2.) Generally, duration is reported at 0.050" lifter rise and numbers are given in degrees before/after top dead center or bottom dead center. 3.) The other parameter that is missing is the lobe centers. So, there really isn't a whole lot that can be said. |
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Posts in this topic
Aaron Cox Mystery CAM - what can you tell me about this lift and duration Nov 4 2006, 08:47 PM
Aaron Cox yes. measured lift at the valve.... (no ratio cal... Nov 4 2006, 10:10 PM Brett W Something is not right with your numbers. When yo... Nov 4 2006, 10:15 PM Aaron Cox ahh.. i KNEW we screwed up the duration...
we mea... Nov 4 2006, 10:18 PM swood You guys won't be able to figure it out withou... Nov 4 2006, 10:20 PM
KaptKaos |
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