MPG (was Re: [Shotimes] Fuel Pressure Regulator.)

[Carl Prochilo]

Well, the good news for me is that the LPM is not a requirement in my SHO,
but it would be highly desirable to be able to reap it's benefits.  As
things stand now, I don't believe that I have an optimized program.
I'm also not interested in blindly attempting the programming changes.  You
are right about Ted being excellent wrt to honoring the lifetime
reprogramming, and my chip has passed back and forth 2x already in the span
of a few months with little to show for it.  However I do have a standing
offer to relax the part throttle settings to see if that will cure my
problem.  I may take him up on that.  Has anyone with an X2J had this type
of change done?

At the end of the day, what will matter are the results.  This comes either
through seat-of-the-pants feel, or by taking actual measurements on a dyno.
I've never done the latter but I am planning to do this very soon.

BTW, a word to the wise.  If you have an LPM and are running a stock FORD
clutch, DO NOT mess with the rev limiter or you are gambling with an
expensive repair.

Carl P.
92 Red

----- Original Message -----
From: "Justin Schick" <jschick@aafp.org>
To: <shotimes@autox.team.net>
Sent: Wednesday, May 14, 2003 9:31 AM
Subject: Re: MPG (was Re: [Shotimes] Fuel Pressure Regulator.)


> When I first heard of it, I caught a snippet in an almost dead thread.
> All I remember is M silk screened on the Motorola chip, I for Intel, and
> "LPMs don't like Motorola chips".
>
> In my case, with the LPM the PCM currently in my car will ping like
> crazy with any part throttle driving under load. No LPM and no ping,
> with both the stock MAF and my recalibrated 80mm. I haven't verified my
> original PCM is Motorola based, just guessing. But my spare PCM is
> definitely Intel.
>
> About your WOT comments from other posts: From what I know, by default
> Ted plays with the spark curves and fuel maps during both part throttle
> and WOT operation. Since my problem was part throttle based (WOT was
> fine, screamed actually) we tried many re-burns to address this issue. I
> know he wasn't trying to make an easy buck, because all it cost me was
> shipping and time. My final burn was for a stock MAF, and I got my 80mm
> recalibrated by Pro-Flo. Still no luck so I just ditched it, but the I
> vs. M thing has given me a wee bit of renewed hope.
>
> Justin
> '92 SHO in KC MO, 190k and counting