The bog is caused by the cams. If you look at stock US spec cams the bog is not there or hardly there. If you look at even the european intake cam the bog begins to become apaparant. If you look with big cams 268s, 276 the bog is quite large. I don't think its a fuel issue, I thinks is more of a port velocity issue. On a side note. On some of velocity's dyno's where they used the tt race header, they gained torque (11 ft/lb IIRC) where this bog occurs. I am no engine builder, I've just observed as many dyno's as I can get my hands on.
Tony 91 GLI 81 Scirocco (soon to have a 2008cc 16v) --- John Caldwell <[email protected]> wrote: > On Mon, 17 Sep 2001 [email protected] wrote: > > > > http://www.scirocco16v.com/Images/dyno_charts/riley-dyno1lg.jpg > > > > This chart shows a problem that seems to be present > on both CIS-E and > moronic 16v's... the massive bog at 3500 rpm. It > seems to get worse on > modified cars, and it looks as though it's mostly > caused by the fuel map. > It's already on the rich side there and then leans > out at the top end, but > with a non rpm sensing fuel module, it looks like > there's just way too > much fuel there. It would be nice to have a fuel > curve along with the > dyno chart to be able to see it, but that's my guess > as to what's going on > there. > > Yet another reason why that k-star box would be > nice... you can actually > adjust the fuel and timing in 500 rpm increments. > > Side note- > I found this dyno chart of a "hot import" on the > net, and WOW... all I can > say is that I wish my car would do a pull like this > one! > > http://www.dynolab.net/images/cart.jpg > > _____________ > List Sponsor: http://www.netsville.com > To remove yourself from this list, send mail to > [email protected] with 'unsubscribe a2_16v' in > the body of your message > See us on the web at http://www.a2-16v.com > Visit the 16V Homepage at http://www.gti16v.org __________________________________________________ Terrorist Attacks on U.S. - How can you help? Donate cash, emergency relief information http://dailynews.yahoo.com/fc/US/Emergency_Information/ _____________ List Sponsor: http://www.netsville.com To remove yourself from this list, send mail to [email protected] with 'unsubscribe a2_16v' in the body of your message See us on the web at http://www.a2-16v.com Visit the 16V Homepage at http://www.gti16v.org
