Re: General tuning question - fuel economy

["Bruce Plecan" <nacelp@bright.net>]

Ya, but you'll get best econpmy at what 92 MPH?.
Hahahaha
50% OD, gad zooks
Grumpy

> I have 87 Vet, 89 code, man trans.  I have done extensive tuning with hwy
> fuel and spark.  I have ended up running zero hwy spark.  I suffered from
> trace detonation with any hwy spark.  I have 11.1 to 1 compression though
so
> your experience may vary.  89 code supports hwy fuel. I tried command as
> lean as 16.0 to 1 and suffered from lean misfire, I am currently running
> 15.5 to 1 at light load areas.  3.45 gears, 30% od in 4th, 23 mpg (US GAL)
> at 70 -75 mph.  AC on.  HOT LT4 cam, headers supperram.
> I just installed  a ZF 6 speed with 50% od in 6th and expect fuel econ to
> improve slightly in 6th once I get a few bugs worked out.
> Mark
> ----- Original Message -----
> From: <JTesta1966@aol.com>
> To: <gmecm@diy-efi.org>
> Sent: Tuesday, June 13, 2000 12:15 PM
> Subject: Re: General tuning question - fuel economy
>
>
> > In a message dated 6/13/00 3:10:46 PM Eastern Daylight Time,
> > smarteney@xlvision.com writes:
> >
> > << e the O2 sensor, hence gas mileage goes down.  How do I compensate,
or
> >  can I?  I noticed there are some Hiway mode parameters, such as Hiway
> spark
> >  add (?), in the 165 ECM that I could take advantage of.  Or, is the
only
> way
> >  to get better mileage mean changing the target AFR? >>
> >
> > In my GN, I run 16.2:1 Hiway mode AF ratio and in the lower load
sections
> of
> > hiwat Mode Spark Advance, I added 4* timing. Added 3-5mpg on the
highway,
> > depending who of my friends you ask
> >
> > ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > Jim Testa
TType86
> on
> > #BuickGN
> > ASE Master Technician
> > buick.fiendish.net:6667
> > L1 Advanced Engine Performance                          NJ Lic MV
> Inspector
> > jtesta1966@aol.com                                  NJ Lic Emission
Repair
> > Tech
> > http://members.aol.com/jtesta1966/buick.htm
>
> --------------------------------------------------------------------------
> --
> > To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> > in the body of a message (not the subject) to
majordomo@lists.diy-efi.org
> >
> >
>
> --------------------------------------------------------------------------
--
> To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
> in the body of a message (not the subject) to majordomo@lists.diy-efi.org
>
>

----------------------------------------------------------------------------
To unsubscribe from gmecm, send "unsubscribe gmecm" (without the quotes)
in the body of a message (not the subject) to majordomo@lists.diy-efi.org