Adjustable VSSB

[ae2598 at wayne.edu]

Who designed this circuit?  Is it something that could be put up on the
ftp site for us to build ourselves?

On Sun, 18 Feb 2001, EK wrote:

> Have something you may be interested in. Similar to other calibration boxes, but has a couple extra "features", such as speed foldback (above certain Speed freq is cut in half) or frequency clamp ( wont output speed higher than X regardless of input speed) which should bypass most speed limiters. 12 user adjustable Dip switches adjust output from 4x input to 0.23x input. I put one inside a small Hammond 1590A waterproof AL box for underhood use on my 95 S-10, since speedo cal in this PCM not readily acessable, and dealer wouldn't re-flash correct calibration. Have about 10 PCBs left and complete parts. Email me if interested. 
> 
> Eric
>     -----Original Message-----
>     From: BogHog1 at aol.com <BogHog1 at aol.com>
>     To: gmecm at diy-efi.org <gmecm at diy-efi.org>
>     Date: Sunday, February 18, 2001 8:43 PM
>     Subject: Re: Adjustable VSSB
>     
>     
>     VSSB = Vehicle speed sensor buffer, it would need adjustment/calabration 
>     after a tire or gearing change some comanies sold them but you had to give 
>     them the gearing and tire diameter and then they would program one for you 
>     for about $200, the problem is we don't always change the gears and or tires 
>     size at the same time  so you needed to spend  2 bills every time you made a 
>     change these are common on 89 and up gm vehicles with electronic speedometers 
>     
>     Kurt 
> 


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