1. When producing low boost (.5 bar or lower) the BOVs cant be heard. Is that because they are not opening or because there is not enough boost to make any noise. 2.If I am running stock boost, (0.6 - 0.7 bar) does that mean that each turbo is producing half of that. Might be a silly question, but would like them to be clarified.
Are they adjustable BOV's? If they are they won't 'blow off' at low boost because they're most likely set to release at a certain pressure...and it's not really necessary to release pressure at low boost anyhow. If you do want to adjust them, and my advice is to get them done by a tuning shop so you get them equal. Also the second qu I'm not sure about...Is that boost pressure reading the balance of the two or the output of one turbo? It may be a dumb qu, but I'll stand by you in ignorance here. :LOL:
Kool thanx for the info guys. The BOvs are adjustable, they are the trumpet style. I was under the impresion that the interanl boost gauge on the dash diplays the combined total of both turbos. So if the guage says .7 bar, then each turbo is producing .35 bar. So I was thinking that each BOV would be releasing only .35 bar of boost, which could be why on low boost that you cant hear anything. (Dose this make sense)..... Also the BOVs have a vacume line on top, how does that work. Cheers guys
pressure is not additive. if boost gauge is reading .7 bar, both turbos are producing .7 bar pressure (and half the total air flow each).
The vacuum line on top works......>> The valve function by providing positive pressure to the top of the valve to match the positive pressure on the bototm. When you close the throttle the pressure in the little hose goes from positive to negative which causes the valve to open with the pressure still being provided by the turbo. It makes more sense when you can "see" what I'm writing but I don't know of any good diagrams
Re: ok, so then people who are running 14 psi on stock turbos That would be me, and that would be correct. I believe that is the limit of their efficiency.
Re: ok, so then people who are running 14 psi on stock turbos and me, i run 14 psi on mine, they are fine.. ive ran 16 a couple of times, but that was only testing, i heard with exhaust, pod, cooler and an aftermarket ecu, 16 psi is fine.. i even heard of a zed running 21 psi with those mods + racing fuel for low 11 sec passes on stock turbos..
