Twincharger controling system

[Ord Millar]

It sounds like you could do that with two (or more) 393 type comparators.
Because their output is open-collector, you can hardware "AND" or "OR" them
if you need to.  Maybe a low pass filter first?

-----Original Message-----
From: Robert Scott Winnicki <bobw at WPI.EDU>
To: diy_efi at efi332.eng.ohio-state.edu <diy_efi at efi332.eng.ohio-state.edu>
Date: Thursday, April 15, 1999 5:38 PM
Subject: Twincharger controling system


>
>I am curently trying to build a controler for my twin charged 87 TII RX7.
>The car has a 40 CI Supercharger blowing through the stock rx7 turbo.  THe
>SC has a electric clutch and is curently manually operated (via a triger
>on the shifter)  I have two pressure gagues mounted on the car (one
>pre-Turbo and one post turbo)  Right now I usally triger the SC at about
>-10 Hg then let off on the SC when I see the pre turbo gauge starts to
>drop.  In addition I have a one-way check valve that allows the SC to be
>bypassed
>
>The problem:  It is really hard to manually turn on and off the SC during
>anything but dragging (straight line stop and start)
>
>I want to make a circut that will compare the pre turbo and post turbo
>pressures and operated the SC according.  Any ideas?  I think I will have
>to go digital, but I suck at designing circuts.
>
>thanks
>bob
>
>