YES. EGR basically pumps exhaust into the intake again and since it takes up space and doesn't burn as well, you have to open the throttle a bit more to get the same power. Opening the throttle further reduces pumping losses and improves volumetric efficiency. Similarly, using taller gears requires greater throttle angles--same effect. Ie. cruise at 40 mph in 5th.
I've found that running lean during cruise also saves some gas. I do get a bit of a miss if it gets too lean, but around 15.5:1 seems to work well. Also, setting your overrun zones to turn off all fuel will help and improve compression braking. Not sure how possible this is on a link though. I've also noticed that fuel pump type enrichments can be a huge source of wasted fuel. As well as lift-throttle areas where fuel delivery lags behind. Matt -- not a hypermiler but not happy to fill up a miata for $50. > Also -- I don't have EGR hooked up. I think taking care of that would > help, too, right? > > > -----Original Message----- > From: [EMAIL PROTECTED] on behalf of Bryan Wyatt > Sent: Thu 5/22/2008 10:57 AM > To: Miata Power List > Subject: Re: Hypermiling with a Link ECU > > I was wondering when you'd ask about that...24mpg, huh? Now I don't feel > so bad! > > -Bryan > > --- On Thu, 5/22/08, Chad J. Douglas <[EMAIL PROTECTED]> wrote: > > > From: Chad J. Douglas <[EMAIL PROTECTED]> > Subject: Hypermiling with a Link ECU > To: [email protected] > Date: Thursday, May 22, 2008, 10:49 AM > > > > > Now that fuel is over $4/gal, I've got to do something about the abysmal > fuel mileage my Miata gets. > > Last year, I removed the turbo because I couln't keep my foot out of it. > That has helped. It took me from an average of 17MPG to 24. > > However, 24 is still icky. I've adopted several hypermiling techniques > to try to reduce fuel consumption, such as starting slowly from a stop, > keeping the revs down while also keeping the engine at more than 10in of > vacuum. > > This has caused some interesting revelations. Sometimes it's best to > stay in 4th and run the revs up a little further before shifting to 5th > because it lets you keep the vacuum needle in the target range. > > So.. Now we come to the Link. > > What can I do with the engine management to increase economy. I'm > willing to sacrifice power. Also, if reattaching the turbo can produce > real gains, I'm willing to consider it.. But I'd rather not face the > temptation to "put my foot in it." > > Thoughts? > > _______________________________________________ > Miatapower mailing list > [email protected] > http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower > > > > > _______________________________________________ > Miatapower mailing list > [email protected] > http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower > _______________________________________________ Miatapower mailing list [email protected] http://list.miatapower.net/cgi-bin/mailman/listinfo/miatapower
