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83 Ur Q
In message <email@example.com> firstname.lastname@example.org (Phil Payne) writes:
> The official test for the WR turbo is to run the car in second gear, foot hard
> down, to 5500rpm and hold it there using the brakes. Maximum ten seconds!
> Using a spreadsheet, you can recreate the graph in the factory documentation -
> two straight lines giving the lower limit and upper limit.
> The lower limit stretches from 0.67 bar at +20c to 0.83 bar at -20c. The upper
> limit is from 0.69 bar at +20c to 0.85 bar at -20c. WRs go a _lot_ better in
> cold weather!
What I forgot to say is - don't under _any_ circumstances rely on the on-board
boost gauge. Two reasons - one is that someone might have messed around with
its input in the process of fooling the ECU, and the second is that the factory
documentation is _thoroughly_ dismissive of its accuracy. In one place, Audi's
manuals actually refer to it as "eine Attrappe". Attach a proper boost gauge
by T-ing into one of the two lines coming off the top of the inlet manifold,
and lead the hose through one of the bonnet louvres and into the car through a
window. I use a 6" dial instrument. While you're at it, check the integrity
of those lines where they join the manifold.
Also - is the upper chamber of your wastegate still open to air, or is there a
hose attached and, if so, where does it go?
Committee Member, UK Audi [ur-]quattro Owners Club