Hi, i just bought a turbosmart type II Vport BOV, now, looking at my engine their is gonna be a spare pipe which i am told is the plumback pipe, when i install my BOV what do i do with the plumbback ?, block it ?, just leave it d/c or what ??
thanks guys,
btw i got a hr32 RB20

You are going to have a few problems with over fuelling on gear changes with a atmos venting BOV. Keep a few snags in the boot so you can fry em up between 1st and 2nd gear a WOT. If you must vent outside, then you will need to block everything, otherwise there will be air getting in after the AFM which is not good.

Regards,
Doc:smoker2:

Block it off, or else the engine will be sucking some air through this open pipe.

I have seen alot of RB20's with atmo BOV, and they seem to not have a problem with over fuelling, if i take it to a workshop to do , rather then myself, is there anything they should be able to do to stop this over fuelling short of a new computer and a MAP instead of airflow ??

over fuelling?? atmo venting? you mean a normal bov that goes pppsshht??? i got the type 3 turbo smart..not a prob...pls explain!
turbo smart adapters for the bov come with a plug to block the return air pipe.....mistakenly i put it in the bov and didn't block the other one....stalled a lot....all the way to turbo smart head office where they pulled all the staff out to have a laugh at the plug in the bov fluttering up and down ...kekeke

Did you tell the staff to **ck off, cause I would of, then I would of run 'em over so they could get a closer look at the blow of valve that is so funny. :p HAHA

Doc

sweet, so all i have to do is block the return pipe, and its all apples ?

yeap...i needed longer piping and stuff...got it of a mechanic mate.
Nah the turbo smart guys were ok...they fixed it all up for me for free.

So has anyone had problems with over fueling when BOV opens when atmos venting on a R33 rb25det when blocking return plumbing

....the overfuelling is only momentary....it's only whilst the BOV is venting ( and the AFM is telling the ECU it's getting more air to the engine than it actually is).......so cruising at a constant speed, there is no overfuelling at all....
.....if you tend to P-CHISH (technical term:D ) all the time, you will see a loss in fuel economy, and you might get a little spark plug fouling in city driving.....
....but this is more than made up for by the added bonus of GINORMOUS flames out the hot exhaust on gear changes when you give it some stick.......:D :D :D

Hope this helps..

Jon.

Originally posted by TINDUCK RACING
....the overfuelling is only momentary....it's only whilst the BOV is venting ( and the AFM is telling the ECU it's getting more air to the engine than it actually is).......so cruising at a constant speed, there is no overfuelling at all....
.....if you tend to P-CHISH (technical term:D ) all the time, you will see a loss in fuel economy, and you might get a little spark plug fouling in city driving.....
....but this is more than made up for by the added bonus of GINORMOUS flames out the hot exhaust on gear changes when you give it some stick.......:D :D :D

Hope this helps..

Jon.

hey hey hey flames?!?! holy shit haha can this happen on a factory BOV?

....in a word,Yes.
..Just slide the rubber pipe connecting the factory BOV to the metal return pipe down the pipe a bit, blank it off with a bit of broomhandle or a core plug, re-tighten the hose clips, and off you go.....the return is airtight, and the factory BOV now vents to atmosphere....big CHISH noises, and if you get the exhaust hot enough,(aftermarket big bore is best)...BIG flames as the unburnt fuel passes through the motor into the exhaust and ignites..........:D

........word of warning though......the factory BOV is a diaphragm type, not a twin piston type, so the car will stall on tickover........not good, especially if ya got an auto.....

.....also them flames can't be good for your cat.....

Take care,

Jon.

Originally posted by TINDUCK RACING
....in a word,Yes.
..Just slide the rubber pipe connecting the factory BOV to the metal return pipe down the pipe a bit, blank it off with a bit of broomhandle or a core plug, re-tighten the hose clips, and off you go.....the return is airtight, and the factory BOV now vents to atmosphere....big CHISH noises, and if you get the exhaust hot enough,(aftermarket big bore is best)...BIG flames as the unburnt fuel passes through the motor into the exhaust and ignites..........:D

........word of warning though......the factory BOV is a diaphragm type, not a twin piston type, so the car will stall on tickover........not good, especially if ya got an auto.....

.....also them flames can't be good for your cat.....

Take care,

Jon.

yeah ive got an aftermarket 3" exhaust system with a K&N. no cat as there are no laws for it in nz... if i block off that pipe..(by the way which pipe is it?) itl spit flames? COOL!

....hehe ...I was just answering your question that it COULD be done with the standard BOV......I'm certainly not recommending you actually do it.....the car will stall all over the place,running very lean on tickover as the diaphragm is held open by the vacuum from the plenum.....not an ideal situation dude.....

..take care

Jon.

Originally posted by TINDUCK RACING
....hehe ...I was just answering your question that it COULD be done with the standard BOV......I'm certainly not recommending you actually do it.....the car will stall all over the place,running very lean on tickover as the diaphragm is held open by the vacuum from the plenum.....not an ideal situation dude.....

..take care

Jon.

ohhh ahhaa sweet... i didnt think it would be tooo good for the car anyway... and as i dont know much about these motors (used to working on old school v8's) im not to keen to get in and touch shit i dont know about haha

hmm...could be why my economy is soooo low!.....but i havn't had any stalling probs whatsoever with the turbosmart type 3 big pssssch trumpet BOV.

I found out why my fuel economy was so poor.......











....apparently, it was because I'd bought a Skyline.........

:hehehe: :hehehe: :hehehe: :hehehe: :hehehe:

Yeah.... i've recently installed a Blitz Super Sound BOV and have also found that my fuel economy has dropped, and also performance doesn't seem to be as good. I don't have any other mods except for that (got the BOV for free).

I think i might put the standard one back on or sell the Blitz and buy and aftermarket Plumb back BOV

--
Andy S

Can anyone reccomend a good air/fuel computer to cure tis problem??
Also does any1 know if u can get a MAP sensor installed on a GTST??

One last ting, Can any1 recomend a good panel repair shop in the Melbourne area ??????

Mick: How the Hell are you going to get a fuel computer to detect/compensate for a momentary loss in air volume after the AFM??

...just wond'rin dude.....

Jon.

Well I know that the Apexi S-AFC does it nicely for a piggyback.
Also tha Autronic ECU does a nice job of dispencing with the airflow meter so there is no need to recirculate the bov then..

Hi Mick,
you can put a map instead of a/f on a gts-t. you can do it with the Link computer available from AVO. This computer is also fully programable so you can tune the sh*t out of it as well!

Yes I have a R33 96 Spec 2 and I just got the car, and a Blitz BOV fitted for me. My car is stalling when coming to a stop and on low revs, the car yard says it has put at least 50 of these BOVs on factory skylines without a worry?? Can anyone suggest why its stalling randomly? My BOV releases air pretty early, maybe 3000rpm if I back off...

I've got a Trust Type R blow off valve on my R32 GTR. For those that haven't seen one it is HUGE. It vents to atmosphere and I have no issues with this over fueling except on the gear changes when under boost. Again this is such a small momentary issue it isn't even an issue.

Yes I've gotten some absolutely HUGE flame outs but not all the time. Some of the flame spurts have been a meter long and nearly half a meter in diameter as told to me by a number of people.

I used to get good flames out of my GTS-t with the factory blow off valve anyways but they do get a bit bigger once you fit a Vent to atmosphere BOV.

As far as I am aware of NO aftermarket ecu or ecu full stop, can or will prevent this moment of less air than is actually there. Even with a plum back system there is still that moment of more fuel than air as there is still a delay before that recirculation takes effect.

Hey Guys,
I have been told that a HKS EIDS (Electronic Idle Stabliser) will fix my stalling problem with my Blitz BOV cos its venting to atmosphere. Has anyone got one of these fitted or knows if they work? and how much they are?

Thanks

You shouldn't be getting a stalling problem in the first place. That sounds more like poor setup of the BOV spring. Try and tighten it up first. If you are stalling that means the valve isn't closing properly, or quick enough for the engine to recover this loss of air volumne.

Yeh I will be with my car tuesday night, I'll tighten it up then, and see how I go. Hopefully that will help it more. Should I reset my computer since Ive had the Blitz Bov fitted and Blitz Air filter?
Thanks guys

Hi, I just install 2 Blitz BOV (atmosphere) on my 89 GTR....I bought this pair used of another GTR from japan and was already set one tighter than the other one....But i adjusted and put them both the same......My bov goes off @ about 3500rpm......but after test drive my car,and start to slow down almost a stop my engine stalled for a few seconds......Can someone plz help??????Should i put it back to setting one tighter than the other????

what up guys. i know the basics about turbos and all that, but i dont get what AMF means. im guessing it has something to do with exhaust gasses?