A lot of the time, I have no idea what you're going on about - eg the first paragraph in your e-mail below. I take issue with sweeping statements that are often just plain wrong. I quote them in my replies. You then seem to attempt to blind me with science but contradict yourself at the same time. I'll sign off with simply repeating for the umpteenth time: Over advancing will cause problems with pre-ignition Retarding will correct but going too far will lose you power. These are basic principles, not tied to any particular engine. For more info, read www.pumaracing.co.uk Martin PS You do realise that advancing means increasing the number of degrees before top dead centre? ie set the DeLorean timing to 13 degrees, rev it and the timing will jump off the scale as the spark is sent more and more in advance of TDC because the time taken for combustion to propagate in the cylinder by and large doesn't change, but with the speed of the engine increasing you need to light it up further and further away from TDC..... content22207 wrote: >My point is: PRV drops from 17 down. Race engine drops from something >closer to 0 down. That's why we have vacuum advance diaphragms and >they don't. That's why we can time closer to TDC and they can't. > > To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx Yahoo! Groups Sponsor ADVERTISEMENT <http://rd.yahoo.com/SIG=12cbre51r/M=266841.4316200.5507732.1261774/D=egro upweb/S=1705126215:HM/EXP=1071958845/A=1911858/R=0/*http://www.lifescapein c.com/picasa/landing.php?capid=222&caId=1987> click here <http://us.adserver.yahoo.com/l?M=266841.4316200.5507732.1261774/D=egroupm ail/S=:HM/A=1911858/rand=883101258> _____ Yahoo! Groups Links * To visit your group on the web, go to: http://groups.yahoo.com/group/DMCForum/ * To unsubscribe from this group, send an email to: DMCForum-unsubscribe@xxxxxxxxxxxxxxx <mailto:DMCForum-unsubscribe@xxxxxxxxxxxxxxx?subject=Unsubscribe> * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> .
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