[urq] RE: ur-q plugs

[Glen Dustin Powell]

The factory specified ur-q heat-range is '5', '7s' are specified for most
5000T and TQ and other non-20V cars. (gentlemen - start, I mean check your
maunals! :) The 91 200q20v F5DPOR plugs will not work in the 10V ur-q
without custom whars. They are the much smaller 'peanut' size plugs and use
a 5/8" socket. This size was used on many 'mericun cars since the late
70s-early 80s. The 10V ur-q plugs are the old-style 'big' 'mericun plugs and
use a 13/16" socket and are physically larger in most dimensions with the
exception of the threads. The F5DPOR plugs will thread into the 10V head and
appear that they might werk. But. The OEM ur-q spark-plug whars will not
touch the contact on the peanut plugs, the peanut plugs are way too short to
reach the whar's centre contact way up inside they-aah in the whar's plug
boot. Audi likely needed the small physical size of the peanut plugs to fit
way down inside they-aah between all them cams and valves in the 20V head
ahh-yup. BTDT with trying to use 20V peanut plugs with the ur-q. Just use
the W5DPO for the same benefits. If the cost of W5DPO is unacceptable to you
then try the tri-electrode version of the WR5DS, I think it is WR5DTS, but
Bosch recently changed their numbering system...... The W5DPOs do work well
IMFO. Consider taking the time to index them upon installation, I swear I
can detect an improvement in responsiveness! (it's likely all in my head)

Cheers,

-glen


<snip>

> >
> > I hate to dump all these questions at once but maybe someone can help me
> on
> > a few points with my newly acquired 1983 urquattro.
> >
> > 1. plug gap using copper bosch plugs (heat rating 7) or should I return
> > these and pick up the 20V turbo plugs ($20 each w/ a heat rating of 5)
>
> My owner's manual claims the stock plugs are a "5" heat range ... WR5DS
...
> while some people swear by F5DPORs in modified turbos, it really isn't
clear
> to me that they are necessary on a stock car.  You can't use the factory
> spark plug wires with the F5DPORs that the 20v uses ... for the same plug
> that fits the stock wires look for a W5DPO (thanks Gary K!).  For a stock
> car I think I'd use the triple ground electrode Bosch units though ...
<snip>