[Shotimes] What Cause a car to run too lean?

[Ian Fisher]

I do not feel that an LPM is necessary with your mods.

I plan on getting a TwEECer RT for my 3.2 once it's in
but it'll have a few more mods that need some fine
tuning..

Ian

--- Carl Prochilo <gr8sho@prochilo.myserver.org>
wrote:

> So is the net of all this that the LPM in its
> current form isn't really
> doing much other than possibly addressing midrange
> (plus WOT is rich
> anyway), and perhaps isn't really needed?  My SHO
> has the 77 with can, P+
> Y pipe and dynomax, and UDPs on a 3.2L.
> 
> I really want to instrument the PCM in the worst way
> to see what's really
> happening in there.  I suspect one or more things
> may be off...  Then
> maybe some custom tuning.
> 
> About the oil situation, if I'm satisfied my recent
> work has sealed up the
> visible leaks, I will use Mobil 1 synthetic for my
> next oil change and see
> what happens.  Motor has about 100K miles on it.
> -- 
> Cheers,
> Carl Prochilo
> 92 Ultra Red Crimson
> 
> On Fri, January 7, 2005 9:38 am, Ron Porter said:
> > That's Ted's opinion. Remember that Doug Lewis
> also has the opinion that
> > synthetic oil is bad for SHO cams.
> >
> > Now, Ted was one of the SHO performance pioneers,
> and was the best at the
> > "chip tuning via USPS", but those days are ancient
> history. Folks have
> > been
> > doing y-pipes for ages with stock programming, and
> as Dave mentioned, the
> > cars run rich at higher rpm once they are above
> the EPA test rpm. The
> > y-pipe
> > upgrade might make it run "leaner" in that
> midrange, but I don't interpret
> > that to mean that it runs "lean".
> >
> > Remember that the additional airflow comes from
> the metered intake side,
> > where the fuel is also increased to compensate.
> The y-pipe isn't that
> > radical of an upgrade that would run outside the
> PCM's latitude.
> >
> > Ron Porter
> >
> > -----Original Message-----
> > From: shotimes-admin@autox.team.net
> [mailto:shotimes-admin@autox.team.net]
> > On Behalf Of Carl Prochilo
> > Sent: Thursday, January 06, 2005 10:21 PM
> > To: Shotimes@autox.team.net
> > Subject: RE: [Shotimes] What Cause a car to run
> too lean?
> >
> >
> > So you are saying this is a myth?  Ted B. seemed
> convinced that the higher
> > flowing Y-pipes caused the engine to run lean due
> to the additional
> > airflow.  Since I don't have any measurements to
> say otherwise, I can't
> > validate it one way or another.
> > --
> > Cheers,
> > Carl Prochilo
> > 92 Ultra Red Crimson
> >
> > On Thu, January 6, 2005 5:43 pm, Ron Porter said:
> >> Carl, many SHOs have gone to better y-pipes and
> have not had to change
> >> PCM
> >> calibrations beyond the range of the stock setup,
> as the O2 sensors &
> >> MAF
> >> can adjust for the change.
> >>
> >> Ron Porter
> >>
> >> -----Original Message-----
> >> From: shotimes-admin@autox.team.net
> >> [mailto:shotimes-admin@autox.team.net]
> >> On Behalf Of Carl Prochilo
> >> Sent: Thursday, January 06, 2005 4:59 PM
> >> To: shotimes@autox.team.net
> >> Subject: Re: [Shotimes] What Cause a car to run
> too lean?
> >>
> >>
> >> New Y-pipe.
> >> --
> >> Cheers,
> >> Carl Prochilo
> >> 92 Ultra Red Crimson
> >>
> >> On Thu, January 6, 2005 4:36 pm, Leigh Smith
> said:
> >>> weak fuel pump
> >>> bad O2 sensors
> >>> vacuum leak
> >>> dirty maf
> >>> anything else?
> >>>
> >>> Lee
> >>>
> >>>
> >>> ----- Original Message -----
> >>> From: "Frank "SHOrage" Costa"
> <SHOrage@brothersofmetal.org>
> >>> To: "1 SHOTIMES" <shotimes@autox.team.net>
> >>> Sent: Thursday, January 06, 2005 12:02 PM
> >>> Subject: [Shotimes] What Cause a car to run too
> lean?
> >>>
> >>>
> >>>> What Cause a car to run too lean?
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