Date: Sun, 3 Jul 2016 09:53:35 -0600
Reply-To: OlRivrRat <OlRivrRat@COMCAST.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: OlRivrRat <OlRivrRat@COMCAST.NET>
Subject: Re: GOWESTY AFM no start problem
In-Reply-To: <BAY405-EAS353C4946838A5BFDA3F603DA0270@phx.gbl>
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Adjusting the Ignition Timing of a NA ICE to Spec' for the Atmospheric Equivalent
of SeaLevel Conditions that Actually exist @ the Alt @ which that NA ICE is being Tuned
For, is Not Tampering > It is the Only Truly Correct Adjustment ~
Most, if not all, of todays Modern NA ICEs DoNot have Manual Adjustments Available
Due To the BuiltIn ability to make this Adjustment OnTheFly Via OnBoard Sensors & ECUs ~
For Example, the 2001 EJ25 in My VDubaru has an Atmospheric Pressure Sensor which
when in concert with the IntakeAirTemp' Sensor, Allows the ECU to make FuelFlow & Timing
Adjustments Based On Pressure Altitude, Not Just Actual Physical Alt' ~ The Sensor that it
DoesNot have, that I wish it did, is a Hygrometer, as that would give it the info needed to be
able Know the Density Altitude for which it needed to adjust ~
DigiJet & DigiFant were Headed in the right Dir' with their AFM & IAT but Fell Short by
Not Adding a Atmos'Press'Snsr & Hyg' ~
ORR ~ DeanB
On 3 Jul , 2016, at 7:38 AM, Dennis Haynes wrote:
> Ignition timing also effects emissions, especially the formation of NOx. I
> know many don't care but that is why our engines are low compression and
> de-tuned. The only thing our engines have besides the low state of tune to
> control NOx is the 3 way catalyst and O2 sensor system. VW did what they
> could to save money including not adding EGR. Tampering with settings is a
> primary reason that almost all adjustment capability has been taken away
> from current vehicles.
>
> Dennis
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> OlRivrRat
> Sent: Saturday, July 2, 2016 9:51 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: Re: GOWESTY AFM no start problem
>
> On 2 Jul , 2016, at 9:58 AM, Dennis Haynes wrote:
>
>> I wouldn't. For most trips he will be heading down to sea level.
>
> Are You Sure of That ~ When I asked DJ >
>
> " @ What Altitude do You Live & Drive Mostly ~ "
>
> His reply was >
>
> " Altitude is 1400' to 3500'. We drive down to the Connecticut Upper valley
> and a over to the White Mountains. "
>
> Is this a GoWesty 2.2 ~ If So, What Timing do they Recommend @ 0'
> ASL ~ Add Alt'Corr' to that ~