where to mount BOV
#1
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where to mount BOV
trying to figure out best place to mount my big red race bov i had it mounted right after the head unit before the intercooler but it was loud as hell drove me nuts on the highway on my new setup I've got the BOV mounted on the exit side if the intercooler
#2
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There are different theories..........
In my opinion, the best place to have it is after the intercooler. The hot side of the intercooler is always gonna show a different pressure than the intake manifold. The vac/boost line to the top of the diaphragm is exposed to the press/vac in the manifold, therefore it is my opinion that the bottom side should be exposed to the same.
For example, if the BOV is mounted before the intercooler
Lets say you have an intercooler that shows a 5 psi drop in pressure. At 10 lbs of boost in the manifold, the top of the BOV will see 10 psi and the piston in the charge pipe will be exposed to 15 psi. What happens????? The BOV is not 100% shut at full boost.
There is a disclaimer that should be stated however. The big red BOV has an adjustment nut/stud on top to deal with this so the issue can be tuned out. Only problem with that though is that pressure drop through the intercooler is probably not linear. Meaning that at 5 psi in the manifold you may only see a 1 psi drop through the cooler. At 15 psi in the manifold you may see a 7-8 psi drop through the cooler.
Hope you're picking up what I'm putting down. Ready to see your **** running again.
In my opinion, the best place to have it is after the intercooler. The hot side of the intercooler is always gonna show a different pressure than the intake manifold. The vac/boost line to the top of the diaphragm is exposed to the press/vac in the manifold, therefore it is my opinion that the bottom side should be exposed to the same.
For example, if the BOV is mounted before the intercooler
Lets say you have an intercooler that shows a 5 psi drop in pressure. At 10 lbs of boost in the manifold, the top of the BOV will see 10 psi and the piston in the charge pipe will be exposed to 15 psi. What happens????? The BOV is not 100% shut at full boost.
There is a disclaimer that should be stated however. The big red BOV has an adjustment nut/stud on top to deal with this so the issue can be tuned out. Only problem with that though is that pressure drop through the intercooler is probably not linear. Meaning that at 5 psi in the manifold you may only see a 1 psi drop through the cooler. At 15 psi in the manifold you may see a 7-8 psi drop through the cooler.
Hope you're picking up what I'm putting down. Ready to see your **** running again.
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milesp07 (05-30-2017)
#6
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Like I said above....many theories........either way has been proven to work.
My opinion, accurate actuation of the BOV.
Your opinion, impeller durability is more important.
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#10
Also if you are running an aftermarket MAF make sure its before the MAF. Might be common sense, but i didnt know at first lol, most delete maf anyway, so no worries i suppose.