dual 450 cfm TBI for 383 ci SBC

[don.broadus at exeloncorp.com]

They would have to be P channel MOS fets since the 747 drivers go to ground.
put a 100 ohm or so load resistor on the the 747 output and the other end to
+12 VDC. the P Channel MOSFET turns on when the 747 driver goes to ground.
since P Channel FETS are hard to come by in high currents , It might be
easier to use a inverter with a pull up and a N- Channel FET.
 
Don   







> -----Original Message-----
> From:	Bruce Plecan [SMTP:nacelp at bright.net]
> Sent:	Monday, January 29, 2001 10:53 AM
> To:	gmecm at diy-efi.org
> Subject:	Re: dual 450 cfm TBI for 383 ci SBC
> 
> 
> Stay tuned,
> I got a new box here to try with some Honkin Power Mosfets in it.  Done
> externally would be a min parts deal, just a good heatsink needed.   This
> is
> not intended as a daily driver deal, just a kludge to get the job done,
> and
> for off road purposes......
> It should last with 6 TBI style injectors.
> Just need some TBI injectors to risk.
> My first, *bad deal* has left me with a TBI injector shortage.
> If some one has 6 or so junk TBI injectors that they don't need (but
> function electrically), that would help.  They and the box will run till
> failure so they will be probably totally trashed....
> Bruce
> 
> > -> Other than building a driver box to control the 4 injectors, what
> > -> kinks can people forsee?
> 
> >  Can't you just use the output from the 747 to trigger a couple of
> > Honkin' Big Transistors(tm)?  Or do you need to add extra stuff?
> 
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