Blow Off Valve Springs

BLOW-OFF VALVE SPRINGS

 

With the amount of aftermarket blow-off valve options that we have available from the likes of Tial, Go Fast Bits, and Turbosmart, you have a variety of blow-off valve springs to choose from. You can choose from soft to stiff spring rates, and this is why you need to have the appropriate spring rate. If you are running a stock turbocharger with stock boost levels, then it would not make sense to have an aftermarket blow-off valve with a stiff spring as it would not open to relieve boost between shifts. This could result in compressor surge issues as the pressure that would otherwise be relieved out of your factory bypass valve or an aftermarket blow-off valve with a proper spring would push the pressure back through the compressor side of the turbocharger. Now if you are running larger boost levels or have a larger turbocharger that moves more air, a softer spring could leak boost under load not allowing you to hit your proper boost targets.

Now generally, when purchasing an aftermarket blow-off valve, the included spring is a good medium to hold higher boost levels, while properly relieving boost at lower levels. And back in the day for some of us that made big power in the late 9s to early 2s, we would result to installing an additional blow-off valve. Now that the majority of aftermarket options are serviceable in terms of replacing seals or pistons in some cases, you can now upgrade or downgrade the blow-off valve spring to suit your power levels. 

 

Need to purchase a blow-off valve or any other turbo mods for your Subaru? Read below and click on the links for further details.

 

• BLOW-OFF VALVES: Aside from the technicalities of relieving the intake system of excessive boost pressure when your throttle body closes to reduce compressor surge which can hurt your turbo, all we care about are the cool noises. Here, you can find all the cool noises. After all, it's one of the fun factors when driving a turbocharged vehicle. You can find the infamous bird chirper known as the HKS SSQ, you can find the turkey gobbler also known as the Tial Q, the raging sneezer known as the TurboSmart Dual Port, and the belching drunkard found in any alleyway on a Friday night. We have literal pages of options to suit your performance and sound needs. Vent to the atmosphere blow-off valves will be the loudest, but in some applications will require a tune to keep your ECU from throwing codes or prevent the car from running rich. We have recirculating options that are quiet and will work just like your factory setup and will recirculate back into your intake. And we have hybrid options which will allow the user to adjust the sound accordingly. On a serious note, however, all of the aftermarket options that we carry will feature stronger springs, and some have adjustable spring options. Because after age and mileage your factory blow-off valve, bypass valve, dump valve, or whatever technical term you choose, will become weak and you will not be hitting target boost numbers. When you have a boost leak, sometimes the turbo will work harder to create more boost to compensate for the loss of boost which can cause premature wear if not addressed in a timely manner. Because of these reasons, blow-off valves serve as performance-supporting modifications other than making intoxicating noises. 

 

• TURBOS: If your factory turbocharger is a little tired or if your bolt-ons have surpassed the flow capacity of your current turbocharger, it is time to upgrade. So many options are available brought to you by the most trusted and familiar brands in the turbo performance industry. If you want a direct bolt-on replacement with similar power levels so you don't have to upgrade your fuel or the internals of your engine we have the right option. If you want to make 35-425 wheel with a turbo made for this power level and want a nice linear power delivery we have several options. And if you want to make more than 5 wheel, we also carry several options to suit your needs. However when upgrading turbochargers and depending on how big you go and how much power you want to make, make sure you have the appropriate fuel system, engine management, and engine components to support your decisions, all of which can be found above. 

 

• WASTEGATES: Another major component within your turbo system designed to control the boost. We carry a great selection of internal and external wastegate setups. Most all factory turbocharger systems from a modern standpoint will have an internal wastegate setup. This will have a small actuator attached to an arm that opens an internal flap inside your exhaust housing and will open to relieve excessive pressure to maintain a target boost number. External wastegates are necessary when making boost numbers that exceed the power and flow capacity of an internal wastegate setup, but can also provide better overall boost control. External wastegates also make your car sound like a jet engine taking off as it will scream off excessive exhaust gases. Compared to an internal setup, those excessive exhaust gases get pushed back through your exhaust system as an external wastegate setup is essentially a loud exhaust leak during boost. Also a very intoxicating sound, but there are exhaust options that route external wastegate setups back through your downpipe for a more quiet operation. We have a vast selection of both options to suit your needs from mild setups to wastegates designed to hold all of the boost. All of these are only brought to you by the most familiar brands in the turbocharger aftermarket. 

 

• BOOST CONTROLLERS: From manual boost controllers to electronic boost controllers, to boost controller gauges, we have a great selection to allow you to hit your preferred boost targets. Manual boost controllers are very simple, and boost can be adjusted with a simple twist of a knob, and can be mounted anywhere. Electronic boost controllers are a little more complex but will allow the user to increase the cabin of your vehicle, as long as your tune is safe and if you're running a safe amount of fuel, then increments of boost can be increased to allow you to run more power down the drag strip or on the dyno. We have many examples brought to you by the likes of HKS, GrimmSpeed, Greddy, Halman, and Turbosmart among others. All of these examples will successfully increase the boost in your turbo to make more power and performance. 

 

• BOOST CONTROL SOLENOIDS: These are very convenient, because if not controlled by your factory settings, adjustments can be made through your handheld tuning device such as an Accessport, or they can be controlled by your preferred flash tune. We carry several 3-port examples as well as other examples. All of these react quickly, and accurately to provide you with the exact boost targets you want to hit. Many tuners will have pump gas tunes that hit a certain target, and then there are other maps for ethanol or race has that will increase the boost targets. The examples that we carry are from the best brands in the industry that include GrimmSpeed, PERRIN Performance, and COBB Tuning just to name a few. These are highly durable to sustain those hot engine bay temperatures, and the majority of these units are application-specific to be plug-and-play upgrades to your boost control system.