Back pressure and torque

[swagaero]

John Hess wrote:
> 
> > ----------
> > From:         Keven D. Coates[SMTP:keven at ti.com]
> > Sent:         Wednesday, August 27, 1997 6:17 PM
> > To:   Bronco Group; Tom Cloud; diy_efi at coulomb.eng.ohio-state.edu;
> > EEC-EFIList
> > Subject:      Backpressure and torque
> >
> > Tom wrote,

> 
> a modern fuel injected engine) can have DRASTIC effects on what your O2
> sensor THINKS it is seeing.  Indeed, low enough back pressures (on
> unheated O2 sensors) can prevent the system from ever going closed loop!  

I think you need to go back to the books on this one an O2 sensor is not
looking at pressure but a voltage generated by tempeture which varies by
the oxy content in the exhaust my exhaust system is only 6" past the o2
sensor and it does a ful voltage scan within 18 sec after startup. That
also includes using 100 low lead av fuel.

 
Steve Parkman