Does anyone know vacuum number (in/Hg) of 996tt at idle? I try to get spring to match Tial Blow off valve. Thanks in advance.

 

my HKS reads -10 - -11.0 or so

 

Chris, You mean 10-11 psi, or 10-11 in/hg . I saw somewhere you also use Tial BOV. What spring rate do you use ,11psi?

 

in/hg at idle. Driving around it varies of course.

The springs... Honestly I used the ones that came from TiAL. We never touched them. In fact I put them on the car from the box. They are the 50mm or 55mm, whatever the BIGGEST ones were. Not the Q versions.

 

chris do you have the Q bov's ?

 

At idle: cold engine - neg 0.6bar, warm - neg 0.7bar

 

mine is about 20in/hg when w]engine is warm.

 

Nick no mine are the standard 50mm BOV's, or whatever the largest ones available. I know UGR uses the Q series, but I wanted the beefier looking ones because they look nastier!

As far as Springs, because I've had a few questions about them. I am honestly not sure because I pulled them out of the box and we bolted them to the Y-Pipe. Tony @ EPL ordered them for me. The only springs we changed were the TiAL 44mm Wastegate springs.