Sorry to bust everyones bubble, but theres NO WAY pcm programming alone can
allow a vehicle to use premium fuel efficiently. Yes it can be set in the
PCM, but the stock compression ratio works the best with 87. So unless
you've done work on the heads and pistons, you cannot increase the
compression ratio, or run premium fuel efficiently. Not even having a
bigger TB will help, just increase the ammount of fuel needed.
-- Gary Hedlin President Hedlin Web Designs http://www.hedlin.net ""RayB"" <bpracing@worldnet.att.net> wrote in message news:DHELJEKAGJCDGEGBEHHJOELKDBAA.bpracing@worldnet.att.net... > > > -----Original Message----- > > From: owner-dakota-truck@bent.twistedbits.net > > [mailto:owner-dakota-truck@bent.twistedbits.net]On Behalf Of Kyle > > Vanditmars > > > > "Droo" <03dakotaCC4.7_4x4@comcast.net> wrote in message > > news:3ED56361.3000802@comcast.net... > > > > > > No it isn't. If you ran your stock 3.9 on 91 octane, you wouldn't see > > > better performance. And they need to run the high octane fuel because of > > > the new programming. All chips are like that. It would ping like a mofo > > > otherwise. > > > > That's not the point. They should be using the same grade of gasoline on > > each run regardless of the timing curve. Granted, it probably > > wouldn't make > > any difference if they both ran 91, but it should still be done > > to see what > > the TRUE benefits of the superchips box are. To compare, it would make no > > sense to test a Fastman 52mm tb on an otherwise stock vehicle, > > then test an > > F&B 52mm on a vehicle with headers. You are looking for the differences > > that the tb's make, and that alone. It's basic science, and one of the > > first things you were likely taught in your high school science class. > > Have to agree with Kyle, in principle. :-) Regarding octane ratings... my > truck, with all my mods, performs better on 92 octane than on 94 octane. > More octane than you need can hurt performance. So....and this part is pure > speculation...Superchips chose to be honest and used the appropriate octane > in the stock motor for best performance, then used 91 with their mods and > charted the difference. Perhaps if they had used 91 in the stock motor > their numbers might have looked even better but wouldn't have been realistic > if the truck owner hadn't used 91 in their stock motor. Possibility?? > > RayB > http://www.dragtruk.com/ENTRIES/20KM1FD2KWBP.html >
This archive was generated by hypermail 2b29 : Fri Feb 06 2004 - 11:46:22 EST