Burger Tuning BMS Elite BMW/Supra B58TU Charge Pipe Blow-Off Valve (BOV) Kit

[R8TTEDR]

For those of us that are not in a huge rush, when do you suppose we should order if we're willing to wait for the revised pipe with the different sensor bracket ?

Maybe 8 months to a year as we made a few hundred sets. There is nothing wrong with the pipe or sensor location, everything fits as it's supposed to and works flawlessly. It doesn't hit anything, it's not hard to install, etc. You install it once, and that's it. Enjoy the upgraded pipe with BOV lol.

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[racebuild]

Installed one today, for those concerned with the sensor placement. It’s an easy fix you unclip the 90 deg wire guide from the connector, flip it, snap it back together and you’re good. Now the harness will route correctly with no bind.

Double o-ring at the turbo outlet is nice and snug compared to any charge that uses the oem style o-ring.

 

[dustwhyn]

Anybody else notice that the BOV tends to crack open below 5-ish PSI? It’s most noticeable when cruising at part throttle. It’s made my turbo noticeably less responsive on the low end, and it feels like the car is fighting itself to overcome the lost boost pressure, but once it gets over 5 PSI, it closes again and the car acts normal.

 

[Bigboss]

Anybody else notice that the BOV tends to crack open below 5-ish PSI? It’s most noticeable when cruising at part throttle. It’s made my turbo noticeably less responsive on the low end, and it feels like the car is fighting itself to overcome the lost boost pressure, but once it gets over 5 PSI, it closes again and the car acts normal.

have you been data logging and notice your fuel trims being thrown off on throttle? Sounds like you’re dealing with the exact issues of aftermarket BOV messing up the air to fuel ratio which is why im skeptical of this product in the first place..

 

[i3igpete]

Anybody else notice that the BOV tends to crack open below 5-ish PSI?

that almost sounds like a mechanical issue, like the bov seals are getting stuck or the spring is off axis and binding. does the valve appear closed with the engine off? I can't imagine any other way how it would open with positive manifold pressure.

aftermarket BOV messing up the air to fuel ratio

AFAIK, this is only an issue with MAF-based systems. the B58 is speed density, no?

 

[racebuild]

Anybody else notice that the BOV tends to crack open below 5-ish PSI? It’s most noticeable when cruising at part throttle. It’s made my turbo noticeably less responsive on the low end, and it feels like the car is fighting itself to overcome the lost boost pressure, but once it gets over 5 PSI, it closes again and the car acts normal.

I noticed this after the install, anything under ~30% throttle the bov is cracked open. It was mentioned earlier in this thread it has the pink spring installed which is the softest spring. B58 produces very little vacuum at idle bc of the valvetronic, so soft spring makes sense. However it is possible that during driving as the valvetronic value changes so does the amount of vacuum produced which is higher than the spring rated at.

I’m gonna log vacuum at part throttle and after lifting under full boost to see if this is true. Spring options listed below if a stiffer spring is needed.

TurboSmart Spring kit:
• Pink Spring (Inner -4 InHg)
• Purple Spring (Outer -10 InHg)
• Orange Spring (Inner -8 InHg)

They also offer a blue spring (18 InHg) separately.

@SgtCki is this the issue you had? How is it with the stiffer spring?

 

[Bigboss]

AFAIK, this is only an issue with MAF-based systems. the B58 is speed density, no?

the supra is speed density but just like most MAF (atleast in my civic)they both have an internal BOV that recirculates the pressure. So if this is venting the excess pressure to the atmosphere instead of recirculating it, you would end up losing any pressure that you would otherwise have. Im not sure how it works on speed density when it comes to venting pressure. Maybe a pro on this platform can clear some explaining in fortnite terms.

 

[i3igpete]

there is no recirculating bov from the factory. during shifts, the engine keeps the throttle open and uses valve overlap to "swallow" excess manifold pressure and dump it to the exhaust. the farting noise is, essentially, a fart.

 

[R8TTEDR]

During part throttle the throttle blade is partially open to hit target boost (regulates boost per ECU target) The bleed off is normal as it's an aid in regulating boost control. Check your logs and you will see your target psi will match requested psi.

 

[a90fresh]

Cruising around BOV sound clip.

 

[Bigboss]

Cruising around BOV sound clip.

you have stock intake sounds amazing

 

[i3igpete]

i came to a similar conclusion. driving around town at light throttle shows positive charge pressure and negative (clipped at zero) manifold pressure. in this case, i would expect the BOV to remain cracked open.

which channel is everyone monitoring?

 

[racebuild]

i came to a similar conclusion. driving around town at light throttle shows positive charge pressure and negative (clipped at zero) manifold pressure. in this case, i would expect the BOV to remain cracked open.

which channel is everyone monitoring?

Went to log, was hoping absolute manifold air pressure channel would also show vacuum… it does not. Gotta grab a mechanical gauge and test.

 

[razorlab]

there is no recirculating bov from the factory. during shifts, the engine keeps the throttle open and uses valve overlap to "swallow" excess manifold pressure and dump it to the exhaust. the farting noise is, essentially, a fart.

Exactly. This whole mod makes the car run as not intended. Crap.

 

[R8TTEDR]

Exactly. This whole mod makes the car run as not intended. Crap.

There are easier ways to say that you don't understand how something works. Being constructive and giving data would be the best way instead of just saying something is crap

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