850wagonT5 Posted May 18, 2011 Report Share Posted May 18, 2011 Oh, and with the NA cams, what timing would you recommend for an automatic car w/ bigger turbo (T04E) on NA cams? Thanks! Link to comment Share on other sites More sharing options...
850wagonT5 Posted May 23, 2011 Report Share Posted May 23, 2011 Been messing around with cam timing a little bit...I'm still not satisfied with the LSA. Tried spreading the I and E apart a bit to reduce overlap and bring the power band down a smidge but the sweet spot is escaping me. Then again, I'm messing around with factory cams trying to look for substantial gains so maybe that's half the problem. lol. Where did you guys feel comfortable and what turbos/boost pressure were you using? Also...if you're retarding the intake and advancing the exhaust, aren't you then bringing the I and E lobes closer together thereby increasing overlap? I could just be mildly retarded, but...wouldn't spreading the E and I apart from each other (retard E, advance I) increase the lobe separation angle, and reduce overlap? :blink: Link to comment Share on other sites More sharing options...
EricF Posted May 23, 2011 Report Share Posted May 23, 2011 Also...if you're retarding the intake and advancing the exhaust, aren't you then bringing the I and E lobes closer together thereby increasing overlap? I could just be mildly retarded, but...wouldn't spreading the E and I apart from each other (retard E, advance I) increase the lobe separation angle, and reduce overlap? Overlap occurs when the exhaust valve is still open from the exhaust stroke of one cycle and the intake valve begins to open for the intake stroke of the next cycle. So advance the exhaust cam and the valve will be closed sooner. Retard the intake cam and the intake valve will begin to open later, thus reducing overlap. That's maybe a difficult to understand explanation but I only had one cup of coffee today ;) Link to comment Share on other sites More sharing options...
ozzimark Posted May 23, 2011 Report Share Posted May 23, 2011 To expand on that a bit, the exhaust cam event happens before the intake. So if the exhaust cam is advanced, it moves away from the intake cam. Same is true if the intake cam is retarded :tup: Link to comment Share on other sites More sharing options...
850wagonT5 Posted May 23, 2011 Report Share Posted May 23, 2011 To expand on that a bit, the exhaust cam event happens before the intake. So if the exhaust cam is advanced, it moves away from the intake cam. Same is true if the intake cam is retarded This is what I was missing. Was visualizing from a picture that ended up making it more difficult! Thanks! Oh, and after doing this, my vacuum went from 18 in to 8 in. LOL! :lol: Link to comment Share on other sites More sharing options...
NChoy Posted June 12, 2011 Report Share Posted June 12, 2011 Here is the install post on V70R.com, as well as some feedback comments. Sorry... didn't know Lucky was posting up his own thread, otherwise we would have collaborated!A link might help: http://v70r.com/forums/topic/32069-na-cam-install-over-the-weekend/ Link to comment Share on other sites More sharing options...
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