blowoff valve questions for 20vt

[Brett Dikeman]

On Mon, 18 Jun 2001, Chris Covington wrote:

> Has anyone here ever run a blow-off valve instead of replacing their BPV
> when it blows?  I see that many manufacturers use those from the factory
> (Mitsubishi, Nissan, Mazda) and this could help eliminate our blown
> hoses, etc. issues with chipped cars and/or upgraded turbos, since the
> pressure is relieved instead of being re-routed.  It seems that
> Audi never has though, I assume even with the RS4, RS2, etc.  Thoughts?

I've replaced the michellin man hose on my car ONCE.  I've owned it for 4
years and about 60,000 miles; 3/4 of that, it's had a chip in it(and the
hose blew before the chip.)

The hose blows because of oil and because the TBPV fails, or the hose
controlling it fails.  Reroute the vacuum line or replace most of it with
copper tubing for a permanent fix.

Never install a blowoff valve on a car not designed for it.  It
immediately causes mixture problems and will trash your catalytic
converters faster than you can say "Krispy Kritter."

Brett