3076R For 270Rwkw

[75coupe]

thanks for the info, but I actually gave to a reputable tuner a std bov with flange and also the atmo HKS bov and said here you go you choose whatever you think is best, they tuned it they picked which bov to use and they set it up... I told them to do it it right, not cheap or easy, to do it right, as I wanted a reliable usuable setup, and that it hopefully see more track work in the future...

Im not a tuner, I drive the car and it works now if what your saying is that Im going to shorten the life of my turbo then Im disappointed in the tuner as I thought they were a good workshop and had alot of experience... all I know is the car runs and makes power, would like better response of course but that could be because many variables...

So is it worth me going to the same tuner and saying what the hell, or do I goto another tuner and start again with the tuning process...

I honestly believed the tuner who did the work would of really knew what they were doing and thus would of made the best choices, I know they certainly wernt cheap...

[Harey]

+1 for plumbing back the bov on all cars with MAF's. The air has been counted and you are loosing it from the system. The biggest difference I noticed was rough acceleration low down in the rev range. It can be mostly tuned around but mine improved moreso once I plumbed the bov back into the intake. It will help response after a gear change although I couldnt tell the difference.

The problem is if its been tuned around, then if you plumb it back you will prob need a quick touch up.

Trent from Status said with an R34 he strongly recommends it, moreso than the R33 but still recommends it for the R33.

What have you done with the pcv valve? Is that plumbed back as well?

[75coupe]

Im running RB26 cam covers hence no PCV valve, running lines from both cam covers for atmo catch can

So it sounds like I need to start again with another tuner...

tuners have cost me almost as much as the parts the themselves and Im still not finished...

I kinda would of expected the tuner to pull me up on these things, but nope apparently everything was fine from their perspective...

[Harey]

Woah hold on, its not a major thing. It will only affect light throttle cruising where you are in vacuum and only very slightly between gear changes when giving it stick (although I cant feel the difference).

It would only require a tiny bit of retuning. The WOT tuning would not be changed.

When I took my car to Trent the bov was not plumbed back and Trent said look I recommend you plumb it back but its up to you. My first tune was done with the bov blocked off as my metal intake pipe had nowhere to plumb it back to yet. It made exactly the same power, the only difference was just minor driveability things like flat spots and some backfiring on gear changes.

Unfortunately, most of the time its a fair bit of work to plumb back the bov to an aftermarket metal intake, so a tuner is not really going to be interested in doing that work. I would prefer them to at least mention it but I think it falls on the owner to sort that out beforehand. Plus 90% of the tuning will be the same anyway.

[75coupe]

yeah I understand its not a massive tuning change, and I have the in my metal intake a large nipple to take the plumb back from the BOV which was blocked off to use the atmo bov instead, but I have a few other things I want to look into in the tune as well... I have an excessive knock issue.

is it really that bad for the turbo to suffer reversion?

thanks for your advice it is appreciated, I put everything together and then asked for them to check and advise and all of it, nope everything is fine... oh good I thought...

maybe I should get another tuner to look at it and see what they say or by the seems of it just an experienced forum member might be able to help...

oh and sorry for kinda hijacking your thread OP...

[Harey]

There are many threads on here about turbo reversion and whether its dangerous to the turbo. Tends to be most people saying that it is dangerous but most stories I have heard have been after a long time and could be other things. Either way I think its preferable to not have turbo reversion.

You could start another thread and post up pics of your engine bay and we can discuss. On this forum you get experienced tuners such as Trent from Status Tuning answering you anyway so you get the best of both worlds!

That does suck if you had it all ready to go and asked the tuner and he still said its fine without the bov plumbed back!

[Tangles]

I tapped my rb25 stock BOV with a hammer on the head above the spring, compressed it a little

works very well on a 400hp engine

[Rolls]

You see - BOV open between -30psi and around -24psi, and then when the car goes to -20psi, its closed and you're "tat tat tatting" to premature turbo failure via reversion..

it wont kill the turbo, lots of cars came from the factory without a bov at all and many high hp high boost cars dont run them either, even F1 cars pushing 50psi didn't run them. Not saying you shouldn't run one (lots of good reasons for recirc) but it wont kill the turbo.

[75coupe]

thanks for that, I'll get sick of the sound pretty soon anyways and want to shut it up, thats what happened last time anyway....

uh oh, did I inadvertedly start a BOV war.... lol

[The Mafia]

I know a lot of people don't run them at all, and they say reversion is on, but Nissan as a whole thought it was a good idea, and their cars work best with a plumb back so its best to keep it that way unless you move to a map sensor.

Plus, sneezing is gay, and attracts cops like flies to shit.

And women don't get naked and jump into your car when they hear it. Sorry to burst all of your bubbles.

lol.

[75coupe]

wow you really have an issue with them huh....

I really dont care if my car sneezes or not I let the tuner advise me on what their experience thought was best.... they chose the atmo bov even though I had provision for the plumb back and also supplied them a std plumb back bov...

Im usually going to fast to see if women are naked or not, let alone worry about their being any bubbles...

luckily I dont carry any shit around with me either hence not having any cop issues...

but I am interested in keeping my expensive turbo safe, so that is the point of view Im interested in.... thanks for the info everyone, back to topic...