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TurboSmart BOV

34336 Views 99 Replies 18 Participants Last post by  boostedboiiiii
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Thank you to TURBO329!!!!! Awesome sir, cannot thank you enough for all the sound advice and the help with the install. I honestly have rarely met someone so enthusiastic and positive about the products and the support after the sale, you are truly a credit to this community sir!
Install went fairly smooth, I was honestly very apprehensive about tearing into my new girl. It is weird, I have worked on thousands of bikes, have no problem with everything from the bottom end up, but I was sweating and had a lot of anxiety about tearing into a mchine that has been such a life acheivement for me to own. I took the plunge, and what an absolute joy, the engineers at kawasaki outdid themselves. What a beautiful machine to work on. A place for everything and everything in its place. That being said, getting the stock bov removed and its encumbent plumbing requires a certain amount of patience. The large hose that connects under the plenum to the airbox inlet area is a monster to get at. I figured a great trick to make it easier (this process is not clearly outlined in the service manual), remove the airfilter and its housing, gently work free from the left side of the machine with that large tube already disconnected at the other end and loose, this allows access to the hose clamp attaching it with relative ease. Its oriented in the down position, indicating install was reverse of this. No way to access it otherwise. Once done, very easily buttoned back up. Bypassed the boost solenoid thingy strictly according to Nate's excellent and clear instructions, and snugged her all down. Removed the pair valve and all its garbaggio at the same time. Simply removed and left the pair controller plugged in and tucked up neat so as to avoid the code 64 (air switching valve switch OPEN). This all done, fired her up, took her out. WOW. That blow off sound has immediately become a part of the symphony that is this machines powerplant. JUST AWESOME. Every time you roll off from a moderate amount of boost... PHISHHHHH!!!! Hahahaha. Great stuff! Fun. What bikes are about, FUN! And I do like the fact that the overboost is not being rerouted to the box. Fantastic job on this piece of kit and the fact that it includes the block and clamp for the pornstar hose is excellent! KUDOS SIR!
(That second pic is the H2 crown...

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Its opening lower in the rpm range in the off / on throttle transitions. Much smoother. The stocker vented more aggressively at a slightly higher rpm range. Directly off of the throttle bodies is smoother by virtue of it not relying on the solenoid to determine the blow off openings and closings. The stock setup is really great for passing emmisions tests, but not the best for linearity of response or smoothness in venting lower amounts of boost from lower operating ranges. These are the ranges of maintenance throttle for a corner carver. Makes a fantastic difference and sounds lovely to boot. ;)
Niobium is correct with The boost being vented to the atmosphere versus putting it back into the intake track is much smoother on the throttle transitions on and off the throttle. Absolutely the way to go to make this bike smooth. I would absolutely rather lose one horse power and have the complete rideability that I have now.
Okay you guys have sold me. Ride-ability is super important.
I guess the next question is where does if blow off? Will it effect total boost at high RPM?
Okay you guys have sold me. Ride-ability is super important.
I guess the next question is where does if blow off? Will it effect total boost at high RPM?
It vents to atmosphere (the air) instead of being re-routed (via a hose) back to the intake track.

No boost is lost.

Recirculating (stock setup) is done only to pass emissions.

Vent to atmosphere is the way the system is intended to work.

The custom TurboSmart BOV will handle up to 30psi of boost. Stock bikes make about 16psi and with gears we're looking at 19-24psi max.
It vents to atmosphere (the air) instead of being re-routed (via a hose) back to the intake track.

No boost is lost.

Recirculating (stock setup) is done only to pass emissions.

Vent to atmosphere is the way the system is intended to work.

The custom TurboSmart BOV will handle up to 30psi of boost. Stock bikes make about 16psi and with gears we're looking at 19-24psi max.
Has anyone just tried venting the stocker to atmosphere?
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I took a look at the service manual as to how the BOV works. It looks to me like the real problem is how positive the stock BOV works not to where is vents.
If you look at the diagram you will see that the valve is activated by a signal from the ECU to the Relief Valve, which opens a vacuum line from the TBs. Here is where the problem most likely is. There is a high pressure line from the air box back to the relief valve that closes the valve forcefully. If that line were restricted or plugged all together the transition probably wouldn't be as abrupt.


[A] Intake Chamber
#4 Throttle Bore
[C] #3 Throttle Bore
[D] Throttle Body Assy
[E] Relief Valve
[F] ECU
[G] Blow-off Valve
[H] To Super Charger Air Cleaner Housing
Vacuum
[J] Air Flow
[K] High Pressure
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Ted sir, I mean this with the utmost respect, ride it first, and then you will understand what Turbo329 and myself and others are trying to explain. Some things are very difficult to get across with just words. Especially when it comes to bikes right. Why does this one handle better specifically than another one??? It becomes a discussion on feel. The stock bov is venting essentially acclerated air that has heated up smply by the processes it has been through, back into where we only want clean cool air. Therein lies the compromise the factory made to make a bike that runs extremely rich pass emissions. We vent the less oxygenated air and suck only clean air in, we get a better burn at those critical low operating ranges that contribute to smoothness. This has given me the ability to pick up throttle smoother and more precisely when hitting the twisties with no loss of power anywhere. When you ask for more power via the throttle, the bov is closed and all the intake charge is being burned, when you roll off the throttle, the negative vacuumn created by that physical act pulls open the bov to vent the excess boosted air that has nowhere to go and is not going to be burned until you roll on. Which is that critical stage where you want clean smooth flow, not preheated, re-vented, less o2 rich air.
The result set up this way with a top quality bov, is fantastic. Period. Not too loud, openings are off of the vacuumn created by throttle let off remember, so let off smoothly, vents very smoothly and quietly, let off aggressively, vents aggressively. The TurboSmart bov is a much higher quality piece than the stocker. I hope that helps sir. Once you ride it, you will see.

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Ted sir, I mean this with the utmost respect, ride it first, and then you will understand what Turbo329 and myself and others are trying to explain. Some things are very difficult to get across with just words. Especially when it comes to bikes right. Why does this one handle better specifically than another one??? It becomes a discussion on feel. The stock bov is venting essentially acclerated air that has heated up smply by the processes it has been through, back into where we only want clean cool air. Therein lies the compromise the factory made to make a bike that runs extremely rich pass emissions. We vent the less oxygenated air and suck only clean air in, we get a better burn at those critical low operating ranges that contribute to smoothness. This has given me the ability to pick up throttle smoother and more precisely when hitting the twisties with no loss of power anywhere. When you ask for more power via the throttle, the bov is closed and all the intake charge is being burned, when you roll off the throttle, the negative vacuumn created by that physical act pulls open the bov to vent the excess boosted air that has nowhere to go and is not going to be burned until you roll on. Which is that critical stage where you want clean smooth flow, not preheated, re-vented, less o2 rich air.
The result set up this way with a top quality bov, is fantastic. Period. Not too loud, openings are off of the vacuumn created by throttle let off remember, so let off smoothly, vents very smoothly and quietly, let off aggressively, vents aggressively. The TurboSmart bov is a much higher quality piece than the stocker. I hope that helps sir. Once you ride it, you will see.
Like I said before, you guys sold me. I'm just trying to understand. Hey, I have 5 more months to wait. So I have to live vicariously off of you guys.
I'm wanting to know WHERE one gets this BOV?And the price?Thanks all...great forum;)
I'm wanting to know WHERE one gets this BOV?And the price?Thanks all...great forum;)
I bought mine from Turbo392. Not sure if he has anymore though....
okay Some..thanks.Their site is apparently in Australia...I'll check em out....
Thanks NOLA...already did...Hope all's well with you.Getting some rides in and all.
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I received some more BOV. PM me for details. I'm not allowed to advertise.

My last batch sold out in one night.
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hi, BOV is ordering, just a question regarding Turbo329 installation: do the by-pass of purgevalve for the boost: ECU update needed? (can i also remove the purgevalve after ECU update?)(i will have to clamp the hose coming from the top of the AirIntakeChamber to the purgevalve?)
Okay, reviving this thread,
Looking into the Turbosmart BOV and the billet boost gauge sold by Extreme Creations.

If I've got this right, the BOV simply gets mounted, and the hose from throttle bodies disconnected from the purge solenoid and connected directly to the BOV, no need to do anything else to the purge valve/solenoid?
Also looking at the E.C. site the boost gauge is mounted by the ignition barrel, then the hose is run from it to the hose connected to the plenum, where it is spliced/T-pieced to that hose, thus getting boost readings.

Does this make sense? Anyone using both these products?
I wrote the last post late at night when tired and bored, woke up couple of hours later with a "D'oh!" moment.

Realised that the boost gauge line would just fit straight onto the plenum where the original line from there to the oem BOV goes. As the BOV would then use the throttle body hose, then the plenum one is then free to use.

Watched Turbo329 video on installation of BOV and line placements/block off required, very informative.

One other question, if the oem BOV is used, can this still have a positive effect if plumbed using the throttle body line to it rather than to the solenoid? Or is the oem one somewhat restricted in function compared to the Turbosmart BOV?
Well, just ordered the TurboSmart BOV & Billet Boost Gauge anyway.
I have fitted the Turbosmart BOV and Boost Gauge.

At the moment I have the BOV plumbed as per stock setup. The boost gauge line T-piece has been inserted in line with the pipe from the plenum to purge solenoid. Now, unfortunately I am unable to test ride the bike due to recovering from major surgery, an will be some months before I can (likely get my son to ride the bike and report back).

Regarding the plumbing setup, I am thinking of doing so as per Nate's instructions with the line from the throttle bodies directly to the BOV. Would it then be necessary to block off the line from the plenum, or at least remove completely and put a M6 bolt in the hole, then place the T-piece from the boost gauge inline with the throttle body line that now goes to the BOV?

I'm leaving the solenoid in place, so the third line that normally goes to the stock BOV, does that need to be removed or plugged off? will it make any difference to just leave the solenoid without any lines on it at all?

Cheers,
Don.
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Well, went ahead and re-routed the hosing as per Turbo329/Nate's directions anyway.
Throttle body line now connected directly to BOV, boost gauge T-piece now inline with that throttle body to BOV line.

Line from plenum to solenoid removed & nipple from plenum removed and M6 bolt in place. Solenoid remains in place, electrical wire still connected, all piping removed from it.

Still to have my Test Pilot (son) ride it for report due to recovery - boy am I missing being able to ride this bike!!
Hey guys... I have a question.. The valve is pointing upwards. That means that if you clean your motorcycle generously, water can remain on the edges ... and possibly also dirt. I mean, it's not so well hidden that it's safe from any environmental influences at this point.

Although air is expelled when you open it... I'm still kind of afraid that dirt could get lost in there, or am I seeing it completely wrong?!?!

I would love to have this valve because I just love the sound.

I asked this at Extreme Creations but didn't get an answer. Maybe because the question was so stupid =?
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