Cant get my Bov to work since i changed turbo

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14-10-2009, 10:42 AM
FastFwd

Quote:

Originally Posted by bloodsword27

take off the little hose that goes to the bov whilst the car is running. the revs should drop as the ECU detects an air leak (unless u have aftermarket ecu and tuned on MAP). if drops, and then back to normal wen u stick it back on, then bov stuffd more than likely. if nothing happens wen u pull it off (std ecu, running afm) then something along the line of the hose is restricting airflow eg clamped between somethng or leak

btw gimme *useful post* thingo so that i can go into the trading forum (cant get in for some reason)

sorry to be blunt dude but your comment was far from useful. This has to be the most primitive way of checking that your vac line is actually working. And yes i do have an aftermarket ECU, and it doesn't make a difference really. AFM - lols its a B series honda motor dude.

Also like i said in my previous posts ive explained that ive tried different vac lines and sizes to test so clamping, or blocked lines are not the case.
14-10-2009, 10:46 AM
FastFwd

Quote:

Originally Posted by lookingforboost

hey man strange thing you have happing there, i8 have a SSQ here with the same clamp if you were close i would let you borrow it to see if its the bov but in saying that ppl with that turbo say that the bov dosent go off untilll higher rpm or higher boost.

i gave up changing bov's after 4 different ones and 3 different vac lines on the 180 when it wouldnt go off so i left the flutter :P sounds better anyway

Yeah man very very strange. I cant figure it out really. I think i might have to pull apart the bov again. Im almost sure there was nothing wrong with it. The little piston rod felt nice and smooth. Before i cleaned it there was a little bit of dust in there but i cleaned that up. Just dont know...

Yeh i love the flutter way more to but ill be boosting it up to 20+ pound soon and its not really that great for the turbo running that pressure back through the turbo on release.
15-10-2009, 11:04 AM
Limbo

i have heard of the HKS ones dying at times for no reason when i was researching BOVs
15-10-2009, 12:12 PM
FastFwd

dam...yer im gonna pull it apart this weekend see if i missed anything.
15-10-2009, 02:53 PM
Limbo

lol mine is only a spring and a piston, not much parts to play with.
I lubed mine up with engine oil
15-10-2009, 03:43 PM
FastFwd

Quote:

Originally Posted by Limbo

lol mine is only a spring and a piston, not much parts to play with.
I lubed mine up with engine oil

Yeh previous bovs like the turbo smart ones are soo easy to pull apart. Just screw the top off and it all comes apart. The HKS has about 15-20 allan key bolts in it.

And pulling it off and on the intercooler piping is a b1tch. not to sure if you knwo what i mean but they are held down by those cer-clip type washer deal. Mission to remove and put back on.
15-10-2009, 08:54 PM
lookingforboost

yeah lol i had a removable pipe section i so i never had to take it off the adapter :P

i actully think it might be a thing with that turbo man caz a few other ppl have had the same sorta thing happen running that turbo on a few different cars ???
16-10-2009, 02:10 AM
blommer

most aftermarket bovs have harder spring rates in them as they vent out on slightly higer psi.
Turbocharged cars like wrx, skyline etc all run on at least 1bar from factory and that is why the bov vents out.
Forced-induced hondas are running way lesser than a bar, hence it might seem the bov is not working as it needs higher boost to vent off??
Just my opinion...
16-10-2009, 07:46 AM
seihoa

Quote:

Originally Posted by blommer

most aftermarket bovs have harder spring rates in them as they vent out on slightly higer psi.
Turbocharged cars like wrx, skyline etc all run on at least 1bar from factory and that is why the bov vents out.
Forced-induced hondas are running way lesser than a bar, hence it might seem the bov is not working as it needs higher boost to vent off??
Just my opinion...

Most turbocharged nissans run only 7-8psi from factory....

WRX and EVOs on the other hand run close to a bar.

Also with the hks ssqv you wouldnt need to build much pressure for it to vent even with jst 2-3 psi u can hear it slighty venting already.
16-10-2009, 10:23 AM
Limbo

yeah man i know what you mean i help a friend remove one from his car also.
He put his stock ones back in for the long weekend LOL

Quote:

Originally Posted by FastFwd

Yeh previous bovs like the turbo smart ones are soo easy to pull apart. Just screw the top off and it all comes apart. The HKS has about 15-20 allan key bolts in it.

And pulling it off and on the intercooler piping is a b1tch. not to sure if you knwo what i mean but they are held down by those cer-clip type washer deal. Mission to remove and put back on.

BTW... factory turbos are generally 6PSI
20-10-2009, 08:24 PM
albii

Quote:

Originally Posted by blommer

most aftermarket bovs have harder spring rates in them as they vent out on slightly higer psi.
Turbocharged cars like wrx, skyline etc all run on at least 1bar from factory and that is why the bov vents out.
Forced-induced hondas are running way lesser than a bar, hence it might seem the bov is not working as it needs higher boost to vent off??
Just my opinion...

1 bar is 14.7 psi ..no way...Rex runs about 11 12.
The bov on factory turbo cars are always plumb back and requiure hardly any spring tension to operate.
If you vent the factory bov to atmosphere it would leak and cause the car to idle rough and it wouldnt hold much boost plus it would cause excessively rich mixtures.
My guess is that the spring tension has not been set right. That's right , even your bov needs to be calibrated and tuned for optimum operating performance.
21-10-2009, 11:02 AM
FastFwd

Quote:

Originally Posted by albii

1 bar is 14.7 psi ..no way...Rex runs about 11 12.
The bov on factory turbo cars are always plumb back and requiure hardly any spring tension to operate.
If you vent the factory bov to atmosphere it would leak and cause the car to idle rough and it wouldnt hold much boost plus it would cause excessively rich mixtures.
My guess is that the spring tension has not been set right. That's right , even your bov needs to be calibrated and tuned for optimum operating performance.

You are right about the 1 bar and the rex stock psi but not all stock cars have a bov. Earlier models of of the sr20 red top didnt come with bov's. all the old turbo rotarys didnt come with bov's.

Yes if the bov leeks to the atmosphere it wont cause much issue you will just loose pressure and it might throw out your fuel mixtures a little but for either having a bov plumback or not doesnt make a difference.

Also the standard hks ssqv doesnt have spring sets or an adjustment so its already suited for 90% of turbo's on the market. I went from a gt2860r, to gt28rs to gt2871r and all turbo's ran fine with this bov until i got to the gt2871r and these turbo sizes arnt much different. Just to confirm i installed the same bov and same turbo on my gf's s15 and it runs fine. Yeh the difference is a sr20 but just to let everyone know we are rulling out the turbo size change here because i know this bov works with turbo's as small as t25 and as big as gt40 because i have applied it to most of these turbos myself.

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