Date:         Mon, 24 Sep 2007 17:46:19 -0400
Reply-To:     Jim Akiba <syncrolist@BOSTIG.COM>
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jim Akiba <syncrolist@BOSTIG.COM>
Subject:      Re: Replacement AFM technology
In-Reply-To:  <ac1f198b0709241418n3f6bdc0x80cbcfee21ac85dc@mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1

>
> We worked on the project and got pretty good results, however we were
> never able to finish the final revision because the buddy of mine that was
> doing the board design etc moved.
>
> We flowed the AFM and MAFs on our flowbench to get the transfer functions.
> I still have the data, and we were going to release it open source, but some
> of our existing customers talked me out of doing so.
>
> The gowesty AFM seems to be up/working, although at that price point it's
> tough. Our unit replaced not only the AFM itself but the entire airbox and
> horrible elbow, which at redline on the boxer introduces a 1psi depression.
> As a result, with the MAF and high flow intake, we saw 9-11% increases in
> power and torque with improvements all across the rev range. The tricky spot
> with doing the intake is that unless you tune it just right, you'll get a
> nasty loud humming resonance, which we eliminated in the final rev of the
> intake tract. GoWesty encountered the resonance too, but since their final
> approach is to keep the stock elbow and airbox they don't have the
> problem(or benefit) of replacing it.. also using the stock airbox allows it
> to fly under CA emissions radar during inspections. I'd prefer to swap in
> the old airbox for the smog test rather than chance it, but I can see why
> they would go that route.  Anyhow, for the time being we do not have the
> person/brain needed to do the final design. If anyone has the EE knowledge
> to do it, but lacks the other pieces which we have, please let me know and
> perhaps we can finally finish it together. We started work on it and
> announced it thanksgiving of 04 on this list. Almost 3 years later with
> lot's of sitting time it still remains unfinished.  I think people would be
> much more willing to pay for the translator if it also gave a bump in
> power/torque and fuel economy potential.
>
> Jim Akiba
>
>
>
> On 9/24/07, Bob Donalds <donalds1@verizon.net> wrote:
> >
> > Jim and the Boys at Bostig did a few tests on my van with a air mass
> > sensor
> > worked well
> > About a year ago
> > they have been off and on the progect for some time it they did mention
> > it
> > on the list
> >
> > Bob D
> >
> >