Date: Sun, 3 Jul 2016 13:27:09 -0700
Reply-To: Scott - IMAP <scottdaniel@TURBOVANS.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Scott - IMAP <scottdaniel@TURBOVANS.COM>
Subject: Re: GOWESTY AFM no start problem
In-Reply-To: <D250B65B-F359-4F94-864F-24200A43D3C1@COMCAST.NET>
Content-Type: text/plain; charset=windows-1252; format=flowed
Does your subaru engine use a Mass Air Flow Sensor in the air intake or
just a MAP sensor.
in the case of the former ...Mas Air Flow Sensor ( which is a big step
over the quite crude Air Flow Meter like vanagon waterboxer engines use
) .....
This is a BRILLIANT device !
First ..No moving parts, no sweeper contacts ...
the ECU just reads change in resistance of almost invisible tiny wires
in the air flow inside the Mass Air Flow Sensor.
here is what is so great about it ..it's almost 'smart' .
Since ....as the air flow in the device flows over the heated wires,
cooing them...and the ecu reads that,
it is able to respond to humility and barometric pressure differences of
the air !
I'm trying to remember if Subaru has an IAT sensor of any sort.
On 7/3/2016 8:53 AM, OlRivrRat wrote:
> 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 ~
| 
