VTA’s
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ZAC MOTORSPORT (12-01-2023)
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ZAC MOTORSPORT (12-01-2023)
11-29-2023, 12:42 AM
#5
Junior Member
Thread Starter
Really??
I didn’t realize, is this a pretty common consensus? I also thought they did have a benefit other than sound as they act like a true diverter valve and only let the boost out when you get off the throttle quick or if it’s overboosting?
I also figured with SOOO many companies having them as an option they must sell a lot, therefire figured they were common and people must like them. definitely would like to hear more opinions though.
I didn’t realize, is this a pretty common consensus? I also thought they did have a benefit other than sound as they act like a true diverter valve and only let the boost out when you get off the throttle quick or if it’s overboosting?
I also figured with SOOO many companies having them as an option they must sell a lot, therefire figured they were common and people must like them. definitely would like to hear more opinions though.
11-29-2023, 10:23 AM
#7
MBWorld Fanatic!
I'm not a turbo system expert, but this is the way I understand it: The OEM system uses a bypass valve (BV) that serves the same function of a blow-off valve (BOV). The BV is a closed system that vents to the intake and the BOV is an open system that vents to open air.
Some of the advantages of a BV is slightly better turbo response when immediately laying back into the throttle, as some pressure is retained in the system compared to bleeding 100% out through a BOV. A BV system is also quieter.
From my understanding, I can't say a BOV has any measurable performance gain, but a BOV can add performance capacity in the circumstance where if you've heavily modified the engine and greatly increased the boost to the point where a BV cannot keep up and is venting too much pressure to the intake side, a BOV will fix that condition.
IMO, unless you have heavily modified the engine, a BOV may cause a slight loss of responsiveness but will give you the “pfffssh” sound.
Some of the advantages of a BV is slightly better turbo response when immediately laying back into the throttle, as some pressure is retained in the system compared to bleeding 100% out through a BOV. A BV system is also quieter.
From my understanding, I can't say a BOV has any measurable performance gain, but a BOV can add performance capacity in the circumstance where if you've heavily modified the engine and greatly increased the boost to the point where a BV cannot keep up and is venting too much pressure to the intake side, a BOV will fix that condition.
IMO, unless you have heavily modified the engine, a BOV may cause a slight loss of responsiveness but will give you the “pfffssh” sound.
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TugboatBill (11-30-2023)
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11-30-2023, 11:06 AM
#8
a VTA BOV will cause issues on anything that is not map based (MAF, AFM etc) since it measure the air, it calculated everything for that air existing which then leads to overly rich condition during bov activation. Granted the E63s quick shifting negates that mostly but it will still be an issue on long pulls.
In otherwords, leave the ricer-o-roni for the JDM folks. Unless you are tuning the car for that and have bigger than stock turbo... then it does nothing.
dont do it on the E63s closed system.
In otherwords, leave the ricer-o-roni for the JDM folks. Unless you are tuning the car for that and have bigger than stock turbo... then it does nothing.
dont do it on the E63s closed system.
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Keith66 (11-30-2023),
ZAC MOTORSPORT (12-01-2023)
11-30-2023, 01:06 PM
#9
MBWorld Fanatic!
I think the reason there are so many aftermarket BOV's available and they sell well is because it's an easy mod that makes a "cool sound" (subjective) and many think it's a performance mod, but it really isn't in our case on a stock car.
It's similar to "cold air intakes" that have open air filters in the engine compartment. Yeah, it makes cool sucking sounds and you may hear more turbo sounds, but in reality, they are sucking hot air in your engine and degrading performance, especially after sitting at a traffic signal in warm ambient temps.
If the sound is worth more than the actual performance, then go for it and enjoy it!
JMO, and I've been wrong before.
It's similar to "cold air intakes" that have open air filters in the engine compartment. Yeah, it makes cool sucking sounds and you may hear more turbo sounds, but in reality, they are sucking hot air in your engine and degrading performance, especially after sitting at a traffic signal in warm ambient temps.
If the sound is worth more than the actual performance, then go for it and enjoy it!
JMO, and I've been wrong before.
Last edited by Keith66; 11-30-2023 at 01:12 PM.
12-01-2023, 02:15 AM
#10
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Join Date: May 2018
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AMGs :)
a VTA BOV will cause issues on anything that is not map based (MAF, AFM etc) since it measure the air, it calculated everything for that air existing which then leads to overly rich condition during bov activation. Granted the E63s quick shifting negates that mostly but it will still be an issue on long pulls.
In otherwords, leave the ricer-o-roni for the JDM folks. Unless you are tuning the car for that and have bigger than stock turbo... then it does nothing.
dont do it on the E63s closed system.
In otherwords, leave the ricer-o-roni for the JDM folks. Unless you are tuning the car for that and have bigger than stock turbo... then it does nothing.
dont do it on the E63s closed system.
VTA has no performance advantage apart from stopping that super heated air from entering back into the intake.
Recirculating the air back into the intake on these cars is purely to keep noise levels down. Let's face it. most new AMG owners do not mess with these cars
We offer VTAs and also our RPA, which does have its advantages.
All VTAs will sound the same. It's just a spacer with a few holes in it .
