Date: Fri, 6 Nov 2020 13:52:28 -0700
Reply-To: OlRivrRat <OlRivrRat@COMCAST.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: OlRivrRat <OlRivrRat@COMCAST.NET>
Subject: Re: GoWesty Engine Management system
In-Reply-To: <CAB2Rwfhz6K+X+Ar3RuGgG5ELSrJNPvESnK=vPZ58dLLHDLf76w@mail.gmail.com>
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Neil N
The OEM AFM gets replaced with a MAF Sensor ~
ORR ~ DeanB
On 6 Nov , 2020, at 10:44 AM, Neil N wrote:
> Thanks for taking time to lend your first hand experience and
> knowledge with this system Dennis.
>
> I find it interesting that GW was able to make an OBD2 system work
> with the older style PWM idle control valve and AFM.
>
> re: performance off idle at ~ 2000 RPM (and maybe fuel efficiency?),
> I'd be curious if using the OE WBX idle control valve and AFM on this
> GM type engine management system, are significant factors. i.e. is the
> Delphi ECU normally used in an application(s) where *all* idle air is
> controlled by the idle control valve and throttle angle, engine load
> etc. is reported by a typical TPS-MAF (or MAP) vs an AFM? i.e. in the
> original application(s), would the Delphi engine management normally
> "transition" from idle to off idle by gradually adjusting the idle
> valve. And, IF typical TPS-MAF sensors respond quicker than an AFM,
> would that response time factor in.
>
> I can't imagine how much time it took GW to develop this system and
> I'm quite sure there was some "give and take" on that.
>
> Neil.
>
> On 11/5/20, Dennis Haynes <d23haynes57@hotmail.com> wrote:
>
>> Eric's is the 4th GW EFI that I have installed and a 5th is scheduled to be
>> installed soon. So here are some of my thoughts.
>>
>
>> In addition to the cost of the system you will most likely want the add on
>> scan gauge.
>
>> Also consider that some parts of the original system get reused such as
>> the idle control valve and fuel pump. If
>> you need a harness and also suffering from worn throttle body and/or air
>> flow sensor those costs do help a lot with the down payment. The system does
>> offer some nice features including CARB approval, coil on plug ignition,
>> sequential injection, O2 sensor that works, Knock Sensor,OBD2 diagnostics,
>> and the GW modified scan gauge lets you read most any sensor and output.
>
>> Performance: Of the 4 systems I installed 3 were for a 2.3L and one was for
>> the GW 2.7L. One of the 2.3L was installed using the OEM fuel injection a
>> year earlier. This installation also had the 4th gear changed from the .85
>> to a .78. The customer was a bit disappointed in highway-hill climbing
>> capability especially at 70 mph plus. After the GoWesty EFI that power curve
>> was back and the before-after was "obvious". For the 2.7L all I can say is
>> wow. Still no rocket! The customer allowed me to test drive to/from work and
>> I also took it on a short trip. The van had a 5speed with 5th gear and final
>> drive changed out along with the 225/55-17 tires, 3200 RPM at GPS 70 mph. It
>> was great. Local fuel economy was disappointing to say the least. For the 75
>> mile trip I did ~18 mpg. This included 70-75 run along with some city
>> traffic. Monitoring the engine parameters it is a bit interesting to watch
>> the igniton timing retard as the throttle is pushed further. I guess NOx
>> reduction and anti knock was part of the plan. Idle speed control is a bit
>> on the lazy side.
>>
>> Quirks: For all the systems sometimes it won't start immediately, release
>> key, try again and instant go. I had a 92 motorhome, Ford 460 that did the
>> same thing.Go figure. Sometimes going off idle there is a hesitation or
>> stumble and under 2,000 rpm and light throttle feels a bit off. Over 2,000
>> rpm things are great.
>
>
>
> --
> Neil n
>
> VE7TBN
>
> 1988 Westy 50º ABA swap: https://tinyurl.com/yap5hpwt
>
> 1981 Westy 15º ABA swap: https://tinyurl.com/y9n4xob8
>
> VAG Gas Engine Swap Group <http://tinyurl.com/khalbay>
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