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Author Topic:   Dynamic compression ratio/cam selection
kopps67
Journeyman

Posts: 31
From: maple valley,wa,98038
Registered: Apr 2003

posted 09-15-2003 06:15 PM     Click Here to See the Profile for kopps67   Click Here to Email kopps67     Edit/Delete Message   Reply w/Quote
I have a 10.25/1 351 windsor that calculates out to be about 8.5/1 dynamic with a hyd 270-280 advertised duration, i'm upgrading to a solid and want the DCR to remain the same if-not increase it. Will I need to approx same adv duration with same lobe centers and intake cent line?
Also how can I increase DCR?
thanks
mark

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steve'66
Gearhead

Posts: 8826
From: Sonoma,CA,USA
Registered: Mar 2000

posted 09-15-2003 08:15 PM     Click Here to See the Profile for steve'66   Click Here to Email steve'66     Edit/Delete Message   Reply w/Quote
Mark,

Yes, and you can increase DCR with a shorter duration cam. But why would you want to, DCR is something you give up for a bigger cam that makes power higher in the rpm range where more h.p. is available. A big cam with a lower DCR is one way to run pump gas in a high compression engine for example.


SteveW

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