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b20f flow numbers 140-160

posted by  fidel on  Sat Dec 23 12:26 CST 2006
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last visit: Mon Jan 31 09:48 CST 2011
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yes it does look like the large valves help flow. contrary to what most volvo engine builders say o this side of the pond. were most i have talked to in sweden have said to always put biger valves in unless rules in a racing class prohibit it.

as far as lift goes i think most cams don't have lift above .47 , well atleast for the ohc, and some big ohv cams go to .51

i just wanted to get a base line before i started working on them. in the end i hope to have all the ports flow the same. i've been contacting some cnc porters to replicate my best ports across a head but none of them want to work with steel heads. it would be easy for me to get a ohc head to flow exactly the same on every port, but it looks like it will take some work on the ohv.






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