Ok im going to be putting a 5557 turbo in my car and i know our vacuum at idle is around 19 or so. Now with the different turbo will this change. Im getting a zzp bov one looks like tial and it has a 21inch spring and im thinkin this may be to much. So if anyone could help me would be appreciated

 

It should not change. Your idle for one is determined by your idle air controller and your turbocharger isn't building pressure either.

 

So use the vacuum line from the factory BPV instead of any old vacuum source?

 

whats the best way then to hook up a tial bov

 

He just told us

 

so i need a new spring then not the 21in spring that comes stock with the zzp one?

 

ya im gonna do a maf relocate to the coldside piping

 

boosting 25psi the tial wouldnt even open with that spring. i just ground down the spring and it works beautifuly now but you can always purchase the smaller springs. i thought they usually came with a 14 spring or something around there.

 

Ya they usually do but zzp has a bov its basically a tial i guess and its 65 bucks. So i could either buy a new spring or cut it down i guess

 

it should open fine on the 21 inch spring. how much vacuum does your car make at idle? typical lnf's make 21 in/hg. so you would use the 21 spring in the zzp bov. zzp tried to make it simple and most still confuse it

 

yeah you can always cut it down. i know when i had the larger spring in there the bov didnt even want to open but i have an authentic tial./

 

how so? it works on pure vacuum. as long as it's hooked up to a pure vacuum source with no tee's in it to any other crap, it will open fast and crisp