 split duration camshafts |
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| mightyohm |
 Jan 30 2004, 06:31 PM
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Advanced Member  Group: Benefactors Posts: 2,277 Joined: 16-January 03 From: Seattle, WA Member No.: 162 Region Association: Pacific Northwest   |
Has anyone looked into split duration cams? I know Jake loves them. I don't know of anyone who is making an off the shelf split duration cam for the 914, are people having custom cams ground to their specs? Is there a recipe for turning an off the shelf cam into a split duration cam, using stock heads/CR? Add so many degrees duration to the exhaust?
Jeff |
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| URY914 |
Jan 30 2004, 08:48 PM
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I built the lightest 914 in the history of mankind. Group: Members Posts: 126,350 Joined: 3-February 03 From: Jacksonville, FL Member No.: 222 Region Association: None |
QUOTE In this context, "split" means "different for intake than for exhaust". So a split-duration cam grind has a different duration (angle of cam rotation that the valve is open) for the exhaust valves than for the intake valves. Similarly, a split-lift cam grind would have a different amount of valve lift on the exhaust valves than the intake valves. Either or both are not a bad thing when the intake side of the engine flows significantly better (or worse) than the exhaust side. Leaving the valve on the worse-flowing side of things open longer, or opening it more, can help ameliorate the worse flow on that side to at least some extent. --DD From the Great Dave Daring (I'll stop now, class dismissed (IMG:style_emoticons/default/clap56.gif) ) Paul |
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Posts in this topic
jkeyzer split duration camshafts Jan 30 2004, 06:31 PM
URY914 Go the Webcam website and they have them and expla... Jan 30 2004, 06:34 PM bernbomb914 I am building a 2270 with a split duration cam fro... Jan 30 2004, 07:20 PM jkeyzer Where are they listed? I must be missing somethin... Jan 30 2004, 07:44 PM URY914 Where are you looking? Jan 30 2004, 08:07 PM URY914 This is from the Webcam website:
DUAL PATTERN:
A ... Jan 30 2004, 08:15 PM URY914 QUOTE
URY914 QUOTE
McMark I'd even go so far as to say that all cams are... Jan 30 2004, 09:45 PM DNHunt Being kind of new to this I have a question. I hea... Jan 31 2004, 07:02 AM lmcchesney Dave,
That is a specific question I have had with ... Jan 31 2004, 08:08 AM DNHunt L
I don't have a clew. Sorry but that's ... Jan 31 2004, 08:43 AM
lmcchesney Monk would not show disrespect to honorrible Grass... Jan 31 2004, 04:55 PM |
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