Boost gauge - where to tap into?

[cmore]

I'm putting a boost gauge into my 2003 RS6. Where should I tap into to pick up boost pressure?

Thanks,
Chris

[snoopra]

Fuel pressure regulator vac hose (back left top of engine under air box - pain in the @ss to pull air box) or tap into DV vac hose:)

[cmore]

hmmm, I just tried to tap into the DV line and it didn't work out. I was only reading 12psi and power was down big time (chipped engine). I removed the T fitting and put back on a straight line to the DV valve and power was completely back.

So either tapping into the DV line caused the DV to bleed boost or there was was a leak in the line to the gauge.

Are you positive that taping into the DV line is fine? My first choice was the fuel pressure valve, but it did look like a pain to get to.

Thanks,
Chris

[snoopra]

I initially had mine connected to the DV's but moved it to the FPR to clean-up the install. Both had the same boost gauge readings.