Re: 4KTQ conversion questions

[Huw Powell <audi@mediaone.net>]

>     The real problem here is not any of the systems delivering enough fuel at
> a 14:1 air/ fuel ratio, but more like 12:1 for on boost demands.  Any NA
> CIS-E could support a turbo charged application, but it would do so thinking
> the extra air being inducted was for a NA application since there is no
> mapping for boost.  But once 10 to 15 psi occur, that 14:1 ratio will be
> insufficient to help retard detonation and keep combustion temps down (EGT).
> That is where the boost input on the turbo ECU comes in, so it can compensate
> for the differing fuel demads when on boost...

and I take it the 80-83 5kt is just detuned to where that doesn't even
matter?  Since that car had simple K-Lambda CIS with exactly the same
ECU as the n/a cars...

-- 
Huw Powell

http://www.humanspeakers.com/audi/

82 Audi Coupe; 84 4kq; 85 Coupe GT; 73 F250