Hi Everyone, I've added new section on the left bar of the blog "Technical Reviews", I will add more and more reviews for every aspect related with Subaru. If u need to do more reading on it. Click on the title. So far I've reviewed one, it is about Blow off valve and Bypass Valve.
Happy reading guys.
Monday, June 29, 2009
Blow Off Valve (BOV) and Bypass Valve (BPV) Technical review
Hello everyone, We would like to share what is the definition of BOV and the purpose of it
Most people confused between BOV (Blow of Valve) and BPV (Bypass Valve). For Subaru Original Blow off valve is actually referred to BPV not BOV. The definitions of BOV and BPV: -
Blow Off Valve - To release pressure from intake tract of a turbo car when throttle closes. It is a vacuum-actuated valve designed to releases the air to the atmosphere. When it releases, then you can here the sound of the BOV.
Bypass Valve - To release pressure from the intake tract of a turbo car when the throttle closes. It is a vacuum-actuated valve designed to recirculate the air back into the intake before the turbo inlet, but after the airflow sensor.
From the above definitions, you guys can differentiate the function of each valve.
Purposes of BOV/BPV - Without BOV / BPV, when the throttle closes and intake system under pressure, a pressure wave will travel back to turbo charger and can result the compressor wheel will stall or also known as "compressor surge". This is hard on the bearings and decreases the turbo's lifespan, and it also means the turbo will take longer to spin up the next time the throttle opened. So, To judge whether BOV/BPV is good or not. its depend at your owned risk. :)
but from our point of view, it is recommended and it is still depends on your modification level.
Is it necessary for Subaru turbo's to use aftermarket BOV/BPV - Not necessary, unless you go for higher boost level then the application of aftermarket is needed.
Downside and Negative effects of aftermarket BOV - It is not necessary and not recommended for stock condition turbo car to install aftermarket BOV, most aftermarket BOVs will require "tuning" (usually via supplied washers, a screw, or other mechanism on the BOV itself) to allow them to idle correctly and blow off at the right time.
The downside of releasing the air to atmosphere is that it has already been metered by the mass air sensor, and when it blows off, the ECU will be injecting the wrong amount of fuel into the cylinders. The engine temporarily runs rich, meaning too much fuel is injected into the cylinders. To resolve this issue, light tuned will be adviceable (Piggy back EM/ECU will helps the problem)
We conclude that If you are wanting to be 100% sure you arent losing any power from a BOV, and you are running under about 22PSI, you are best off sticking with a stock unit.
[Resources :- Nasioc Forum by Unabomber's Manifesto]
[Summarize by MrZeroWrx BSC]
Most people confused between BOV (Blow of Valve) and BPV (Bypass Valve). For Subaru Original Blow off valve is actually referred to BPV not BOV. The definitions of BOV and BPV: -
Blow Off Valve - To release pressure from intake tract of a turbo car when throttle closes. It is a vacuum-actuated valve designed to releases the air to the atmosphere. When it releases, then you can here the sound of the BOV.
Bypass Valve - To release pressure from the intake tract of a turbo car when the throttle closes. It is a vacuum-actuated valve designed to recirculate the air back into the intake before the turbo inlet, but after the airflow sensor.
From the above definitions, you guys can differentiate the function of each valve.
Purposes of BOV/BPV - Without BOV / BPV, when the throttle closes and intake system under pressure, a pressure wave will travel back to turbo charger and can result the compressor wheel will stall or also known as "compressor surge". This is hard on the bearings and decreases the turbo's lifespan, and it also means the turbo will take longer to spin up the next time the throttle opened. So, To judge whether BOV/BPV is good or not. its depend at your owned risk. :)
but from our point of view, it is recommended and it is still depends on your modification level.
Is it necessary for Subaru turbo's to use aftermarket BOV/BPV - Not necessary, unless you go for higher boost level then the application of aftermarket is needed.
Downside and Negative effects of aftermarket BOV - It is not necessary and not recommended for stock condition turbo car to install aftermarket BOV, most aftermarket BOVs will require "tuning" (usually via supplied washers, a screw, or other mechanism on the BOV itself) to allow them to idle correctly and blow off at the right time.
The downside of releasing the air to atmosphere is that it has already been metered by the mass air sensor, and when it blows off, the ECU will be injecting the wrong amount of fuel into the cylinders. The engine temporarily runs rich, meaning too much fuel is injected into the cylinders. To resolve this issue, light tuned will be adviceable (Piggy back EM/ECU will helps the problem)
We conclude that If you are wanting to be 100% sure you arent losing any power from a BOV, and you are running under about 22PSI, you are best off sticking with a stock unit.
[Resources :- Nasioc Forum by Unabomber's Manifesto]
[Summarize by MrZeroWrx BSC]
Sunday, June 28, 2009
Happy Birthday to MrTypeR aka Our Brada Dullah
Happy Birthday bro
Have a good one bro for this birthday and good luck for the upcoming MODS.. cant wait for the typeR on the road again sooonnnn.. yahooo.... we are happy for u broo
Wednesday, June 10, 2009
AdvanRex a.k.a Lanzar Optidrive
AdvanRex a.k.a Lanzar Optidrive
This is Subaru Ver.8, owned by one of the member’s known as AdvanRex. The owner still maintains the stock looks of the car, with only additional aftermarket trust front lips. By looking at the front bumper, Greddy Front Mount Intercooler was fixed not only to enhance the look of the car but to increases the power output.
With the current MOD, I reckon this wrx can go till 300hp. So, if u underestimating this Subaru by only looking the the wrx look, then u are wrong. Trust downpipe and full blitz nur exhaust sytem was installed and can produces more power especially on the straight and free flow with 3” straight piping system.
Previously this wrx was installed with bigger turbo (GT30), but due to the complexity of not enough resources to fulfil and reliable parts. Owners actually make a good choice to install back the stock turbo of wrx, and believe it or not the power is just pretty powerful.
Suspension of JIC Coilover system was installed and beautiful looks of ADVAN RGII was fitted to suit the tough looks of the car. AFC NEO also installed as their piggy back ECU to bypass some of the restricted function from the stock ECU and this make the car reliable and when we talking about safe. This is one of the good examples of safe modification.
To end the statement, I believe you guys interested more on the pictures. Hehe.. enjoy the pics guys
Tuesday, June 9, 2009
Subaru WRX Ver.10 For Sale
2008 SUBARU WRX V-10 FOR SALE
5K Deposit and cont bank 700++ for 5 1/2 years
NEGOTIABLE
Mileage = Almost 40k KM (38k ++)
Inclusive
5K Deposit and cont bank 700++ for 5 1/2 years
NEGOTIABLE
Mileage = Almost 40k KM (38k ++)
Inclusive
- Come with 18" Sport Wheel (Newly Bought)
- Greedy Type RS blow off valve
- Bolt on Blitz air filter
- Blitz racing lube oil
- 3" Custom piping and exhaust
- service and fully maintain at Hayashi Motorsport
- Bodywork care by swissvax
Saturday, June 6, 2009
Sunway Trip to N1 Racing, Redzone and Kakimoto
I went to Sunway, KL. I went to visit mentioned motorsports and It was soooo amazing and interesting.. lots of things to be grabbed, but unfortunately I came back with empty hand. ahakx. Save budget.
And guess wat car I saw.. hehe nothing can be explained. enjoy the pics
Tuesday, June 2, 2009
Hypertune Photoshoot
Hi All, I didn't manage to snap lots of pictures because I was working on that day. Anyway, Enjoy the pictures and Stay Tuned
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