Re: ur-q detonation

[Robert W Obrien <rwo@u.arizona.edu>]

On Mon, 27 Oct 1997, Phil Payne wrote:

> In message <3.0.1.32.19971026174016.00685de0@sc.llu.edu> Staci Hemmerlin writes:
> 
> > My 83 ur-q is detonating under boost at about 7 psi.  The wastegate and
> > computer are stock.  The boost will go as high as 8.5 psi.  I am running
> > nothing but supreme fuel (92).  This has been going on for about 6 months.
> 
> Design is 95/98 octane.
> 
> -- 
>  Phil Payne
>  Committee Member, UK Audi [ur-]quattro Owners Club
> 
With all due respect (never a problem you can't solve Audi-wise, Phil) I
think we might be talking about two different means of measuring octane.
USA hi-test is anywhere from 91-93 octane. Was that way back in the brief
reign of the urq in the 80s, too. So I can't imagine them specifying a
fuel unavailable outside racetracks- but it is AoA after all. 
Regards,
Rob
87 5kcst. Fuel door says 92 octane minimum, owners manual states 87 octane
US permissible. Hence my theory on different measurement. Maybe it's
Whitworth gas;)