Jump to content
SAU Community

Recommended Posts

Hey guys i have a Gtr 33 v-spec with 440awhp it I's running standard bovs I'm awhere they are some of the best put there, just wondering if you can make them louder I'n any way cause mine seem to be very quite and u do not here them at all unless I'm really under it then i here a Lil puff I's this normal?? Thanks!!

Link to comment
https://www.sau.com.au/forums/topic/371508-gtr-33-bov-question/
Share on other sites

Chuck a metal intake system and run pods, its the only way to get sound out of the GTR BOV's. The only other option is run atmo which you cannot do with the GTR BOV because it will be vacuumed open and air is always flowing through it.

The most you'll get out of it is a whoosh kind of sound. Just block them both off and start fluttering :thumbsup:

Hey guys, just wondering why would you sacrifice performance if you run an aftermarket atmo bov? I thought they were meant to be better?

its because the GTR run AFMs and if you make them open to the atmosphere the air that comes out has been metered and the air is still rushing through the AFMs then going out the bovs and the computer is putting fuel into engine for that air which will make engine run really rich while the bov is open meaning when you go for the next gear you have to get rid of that fuel to get engine running its best again.

pods are your best bet or run 1 atmo and 1 return that way there is still air stopping the flow through he AFMs.

Thread closed. Believe it or not, but since SAU started more than 7 years ago, this topic has been discussed before.

Please use the search function in future. It may be found here:

http://www.skylinesaustralia.com/forums/index.php?app=core&module=search&search_in=forums

While we understand that it can be frustrating to have your thread closed - Please consider that other members may feel it to be disrespectful and selfish of you to post a simple question, without using the search feature to review the wealth of information provided by said members over the years.

If you still feel that this action is unjust, then please PM me and we can discuss it further.

Guest
This topic is now closed to further replies.


  • Similar Content

  • Latest Posts

    • my catch can is pretty easy to empty but it overflows due to the blowby/crank case pressure etc. max I have drained is ~600ml even with a ~2.3L capacity. So it is not just about having to drain it out its the mess it makes down the firewall and under the car and rear passenger tyre from the overflow oil being blasted by screamer + air in general. Ending up on the ground cleaning the oil up and having oil on your arms when everyone else can chill and watch the other sessions gets old fast
    • Yeah - the secret learned a long time ago is that the RB likes to belch oil out the covers, and/or starve the pump because it drowns the head in oil, because the upflow of crankcase gases from piston blowby comes up through the oil drain holes in the block and prevents the oil from flowing back down. The external vents from sump are about creating an alternative path/much more XS area for gas flow to decrease the gas velocity up through the oil drains and allow the oil to get back down. So, it's not about pressure at all. It is about flows - gas up and oil down - or when it's not working, gas up and oil not going where it is supposed to after it arrives at the top, except out through the cam cover vents. And regardless of whether the catch can is vented to air or vented to the turbo inlet, it must still be vented because a sealed system would blow out the crank seals, or something equally bad.
    • I just used a can that's easy to empty after every session and pour it back into the fill hole. Takes about 40 seconds when you have 40 minutes between runs :p I don't see how changing any catch can stuff will reduce pressure if the system is sealed. And if it's vented - Does it matter where it's vented with regards to overall pressure?
    • Welp, too late already committed to the cam cover breathers to be welded on. I did think about adding a catch can in line with the drivers side sump breather as a phase 2 along with a drain to the sump on the original catch can but with an inline ball valve so I can have it closed if needed.    Likely a single breather would have been enough but I think I’m overcompensating to hopefully not have to empty my catch can and clean up oil over flow every session.    out of curiosity has anyone actually measured crank case pressure before and after various mods? I’m considering adding a sensor for science 
    • Is it a dog or synchro box? I guess either way, if it is new and crunching in one gear only, it has to come out and go back to the shop to check/measure as there is either an assembly or manufacturing issue
×
×
  • Create New...