no, the 'psi' refers to vacuum, converting from psi to in/hg is 2.0x the psi, so if you pull -11in/hg you want the -6psi spring (which will open at -12in/hg)

2 TiAL bov's on anything less than say 1300whp is not necessary

on a 2200hp app, one Q is enough

 

Just out of curiosity why does HP dictate how many BOV's you use?? A 700ci v8 running 15psi of boost making 2000hp surely wouldnt require what a 122ci running 80psi of boost making 1300hp would, correct?? Certain applications run Wastegates for BOV.. Some applications run NO BOV and 70psi of boost..

 

Twin BOV's are for ricers...

 

^ my thoughts exactly

To the OP, if you want to read more about my theories feel free to pm me.

Tialsport--- I have found in my testing, that by heat stressing the springs, or even slight shimming of the spring, would drastically change the characteristics of the valve. Why is it that tial only sells springs in full # increments ?..Not bashing just simply asking.

 

Well ive read up about everything and i relize now why you run two. I was just sitting around wondering if anyone has ran twin bov's. Thanks for all the information. and im DEF not going to be running two. I have ONE tial.
Thanks guys.

 

that actually depends on the car, i know many evos that run it vta no problem on stock maf. Many supras and srt's also run it with out problems and it holds boost fine. I prefer to defend parts that have proven themselves , like the hks ssqv.

 

How do you figure it is a bad bov? On every car besides a evo it holds great boost and works just as well as any other bov.

Maybe the worst for a evo, but no worst then any other full VTA bov.

 

We have build an upper intecooler pipe w/ twin TiALs for a couple customers. We only run one 50mm on our 1100hp car, but the old setup had two.

Check out the link below.



http://www.extremeturbosystems.com/D.../articles.html

 

just keep one valve and call it a day. unless your going for looks..