<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by brad black &raquo;</TD></TR><TR><TD CLASS="quote">
the injected engines have short manifolds and longer duration cams. so they make less low rpm cylinder pressure comparitavely on both counts. meaning they would be less likely to ping because of that. secondly they have a digital tapering ignition advance curve. so they are less likely to ping on two points - cylinder pressure and spark advance. a short manifold, long cam carbed bike would exibit the same tendencies i'd expect.</TD></TR></TABLE>

Hi Brad,

On my Pongo (ST2 cams, FCRs on short manifolds, 95 mm Pistal pistons, .038" of squish), I have retarded the spark plate 2 degrees and I will occasionally get some pinging under heavy load, mid- to high- rpm conditions. Though that could also be some of California's mandated crap gas that I occasionally purchase in the middle of nowhere.

Chris