Installing Aftermarket Bovs

[usmair]

Hey.. I'm planning on installing aftermarket bovs (blitz super sound dd) soon but I just wanted to check if installing them on a gtr tuned using a pfc with stock bovs will cause any dramas.

I've heard there could be stalling issues

Anyone with any thoughts/prior experiences?

[N1GTR]

Why on earth would you replace the stock units?

My advice: don't do it. Stockers have proved themselves over and over and over to take huge power with zero fuss. Best part, they're free.

[Piggaz]

Why do you want to replace something that works perfectly?

AFM's wont like it.

Leave them alone and spend the money on something to improves the car... not some poofy noise!

[doo doo]

I've used an atmo bov with my power fc and i think one issue is that the stock bovs are usually slightly open at idle which avoids turbo shuffling and potentially upsetting afm signals. Mine shuffled a lot when I put the atmo bov on (running the power fc) and had it tight enough to be necessarily closed at idle, plus I had some compressor surge at lower flow rates which really messed with the afm signal and therefore the afr's- I think the stock bovs would have alleviated this. The issues disappeared when I went to map sensor based ecu, and then being able to soften the bov spring to allow it to open at idle got rid of the shuffling. My feeling is that the stockers would be the most trouble free option with afm based ecu.

Edited August 31, 2011 by doo doo

[R31Nismoid]

You'll need a retune to stop the stalling/backfiring issues that you'll get.

comp surge might also start to occur.

[usmair]

i like my ppssh sound

plus i got a good price so decided to put them on... been driving around with the stockers for a while and I kinda miss the sound... each to their own

thought there would be stalling issues... ill get em put on when the haltech goes on

[dori34]

can the GTR stock BOV be run as atmo?

i got a haltech ecu running map sensor so i wont have issues with the AFM not liking it or stalling.

the blitz BOV i got installed atm is rubbish as i suspect it to be leaking & not holding boost.

ideally i want to upgrade to a HKS SSQV but if a GTR bov can do the job properly that will be the option to go.

[R31Nismoid]

Well they leak @ idle/low throttle, so not really... As the air is going through the turbos but not making it to the intake so response would be doughy as a result.

You'd need BOV's that seal always in that situation

[N1GTR]

can the GTR stock BOV be run as atmo?

i got a haltech ecu running map sensor so i wont have issues with the AFM not liking it or stalling.

the blitz BOV i got installed atm is rubbish as i suspect it to be leaking & not holding boost.

ideally i want to upgrade to a HKS SSQV but if a GTR bov can do the job properly that will be the option to go.

Has been done, i think it cost about $50 to do and worked perfectly. The guy who did it was "sh@un"

[dori34]

Has been done, i think it cost about $50 to do and worked perfectly. The guy who did it was "sh@un"

thanks, will try and search for his posts/thread if he made one.

[R31Nismoid]

Has been done, i think it cost about $50 to do and worked perfectly. The guy who did it was "sh@un"

So he had them modded you mean ye?

Just a spring or similar id imagine.

[dori34]

if its anything like what ive found from searching, they blocked the hole on the base of the bov with a screw or welded it so its sealed.

gonna try tonight by removing the bov and installing a blanking plate, if this improves response i will leave it this way till i get enough coin to buy a HKS one.

i cant be bothered to buy a GTR/GTST bov and mod it as i dont have the time or patience.

dammit blitz, why couldn't they just made a good BOV from factory like HKS!

[Kenna802]

No Offence Nismoid but you have handled this BOV thread very well, I was actually starting to believe that you hated BOV's and would destroy anyone that had one. I almost wondered if you would offer money for people to send there old BOV's in if they went back to reticulation ( just a thought lol) anyways i had a BOV and have gone back to retic I have now noticed car runs much better down low before boost and spool up time and also keep MIster Plod away as well.

[R31Nismoid]

I don't hate BOV's, just a lot of people swap them over and pay the price (poor running etc), and then come back in a few months with another thread about stalling/backfiring or economy etc.

If you go about it the right way however (which means retune, custom work etc), then it's all good.

There just aren't a lot of people willing to do things properly and then complain about the half-baked set-up that results.

[Kenna802]

Can't argue with that , I think though everyone has to learn the hard way lol I do !!

[N1GTR]

So he had them modded you mean ye?

Just a spring or similar id imagine.

Nah no spring, it was years ago and I cant remember exactly - ill sms him and see if he remembers

[N1GTR]

"gotta put little cylindrical filters on the bov outlets so they don't suck crap in off boost (there's some K&N variety that's almost an exact fit), then block off the recirc pipe"

[sh@un]

It indeed does work perfectly, and will give you the noise you'd expect on gear changes. Personally I started to find said noise very annoying everytime you backed off the throttle slightly when having a go. Pretty sure it didn't make any difference to turbo response between gears in the end anyway.

Obviously, as has been mentioned, you can't do it on cars still running AFM's. MAP based load-sensing only.

[Piggaz]

Ptshhhhhhh!

[Room42]

Ptssshhhhhhh....BANG...FLAMES...Stall... Oops that was the intercooler pipe popping off again