Rich in Texas!

[Shannen Durphey]

Yikes!  You have a 305TPI?  Well, forget it.  It's hopeless.  
; )  

Just kidding.  The ARAP calibration that I mentioned is for a 350. 
It's probably not a good starting point for a 305.  When you start
making changes, remember to start small and write everything down. 
Don't change a bunch of things today then try to decide tomorrow which
one made the most difference.  Writing everything down will take
longer and will be a PITA sometimes, but you'll really get a feel for
some of the relationships between the numbers on the pc screen and the
car's performance.  And it's still a whole lot easier than chasing
down jets, metering rods or advance weights.

Shannen


Sahli wrote:
> 
> Basically altering or refining the settings, how much horsepower/percentage
> of performance do you think the factory missed. I know I can make
> adjustments to compensate for worn ring or sluggish injectors. I'm new at
> this and the DIACOM has let me into some of the controls than you never see.
> I have a 305 TPI and there is a guy who is running 9's lotta Vortech and
> intercooler to help. Just trying to maximum power without any explosions.
> Thanks Rich
> -----Original Message-----
> From: Bruce Plecan <nacelp at bright.net>
> To: diy_efi at diy-efi.org <diy_efi at diy-efi.org>
> Date: Tuesday, September 19, 2000 8:49 PM
> Subject: Re: Rich in Texas!
> 
> >There's been mention of a 30HP lose in back to back testing, BUT that was
> in
> >a turbo application at about 550HP.  I can see where in that application
> >there may be cause for that.
> >
> >I'm not sure what your asking in the 2nd question
> >Bruce
> >
> >
> >> Sounds like an idea. I understand that the MAF is a restrictor. Is there
> >> actual horsepower to be found , when the ECM setting are changed/altered?
> >> Rich
> >> -----Original Message-----
> >> From: Shannen Durphey <shannen at grolen.com>
> >> To: diy_efi at diy-efi.org <diy_efi at diy-efi.org>
> >> Date: Tuesday, September 19, 2000 8:10 AM
> >> Subject: Re: Rich in Texas!
> >>
> >>
> >> >Hi, Rich.
> >> >
> >> >Sounds like the guys running large displacement engines or
> >> >superchargers are finding the MAF sensor is only effective part of the
> >> >time.  It doesn't take long for the engine to start using  more air
> >> >than the sensor was designed to measure. Once the sensor's maxxed out,
> >> >the ecm can only make it's best guess for fuel.  Sometimes the best
> >> >guess is helped by add on injectors, or rising rate fuel pressure
> >> >regulators.
> >> >
> >> >Bruce's suggestion is to use the ECM from a GMC Syclone or a
> >> >turbocharged Pontiac Sunbird.  This ecm (part no. 1227749) uses a MAP
> >> >sensor and can be used for an 8 cylinder engine.  You might think
> >> >about converting over.
> >> >
> >> >Shannen
> >> >
> >> >
> >> >
> >> >Sahli wrote:
> >> >>
> >> >> Shannen,
> >> >> This is Rich from Texas met you in NH. Well I'm scanning my 88 305 TPI
> >> with
> >> >> DIACOM and I'm trying to figure out what areas have to be altered when
> >I
> >> >> install an supercharger. I realize that most of the fuel maps. Has
> >> anybody
> >> >> had success programming their own chip for supercharger application,
> >open
> >> to
> >> >> all. Thanks
> >>
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