f1karting Posted October 29, 2007 Report Share Posted October 29, 2007 (edited) Lee: I dug out a tuning book I have from David Vizard.. he claims that given a NA engine on 97 octane reguires say, 35 degrees total advance, that a forced induction engine would have total timing reduced 1.1 degree for each 1psi of boost. So 10 psi = 24 degree advance. Not sure what the boost limits are in his formula??.. cant imagine 32psi=zero advance I have seen Davids tuning forum but cant locate it at the moment to ask him. (OK maybe this is it.... www.gofastnews.com/board/ Graham Bells book, Forced Induction Performance Tuning shows 20-25 degrees as an example for a turbo engine, and goes on to state that 'if not overdone' slightly retarded timing improves turbo spoolup. This article on the detonation proceses is interesting: www.kb-silvolite.com/feature.php?action=read&F_id=29 A solution.. www.jandssafeguard.com/tech.html Edited October 29, 2007 by f1karting Quote If you set no goals you shall surely reach them.. Link to comment Share on other sites More sharing options...
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