blow off valve
- Thread starter justin949
- Start date
SY756
New member
Assuming that you have stock turbo and intercooler, you'll need a metal turbo to IC pipe with a blowoff flange welded to it. I have seen pics with a blowoff mounted right to the side of the IC but I would recommend the first option. See here this thread.
http://syty.net/phpBB2/viewtopic.php?t=22545
If you want to permantly disable the stock wastegate you could weld it shut but I would just keep it closed tight using a STRONG spring. Then you can mount a external wastegate to the crossover.
Just my .02
http://syty.net/phpBB2/viewtopic.php?t=22545
If you want to permantly disable the stock wastegate you could weld it shut but I would just keep it closed tight using a STRONG spring. Then you can mount a external wastegate to the crossover.
Just my .02
InvisiBill
Active member
FYI, a BOV mounts between the turbo and throttle body. It's connected to a manifold vacuum source. When the pressure is greater on the turbo side (i.e. throttle just slammed shut), it vents the extra pressure out, rather than forcing it backwards through the turbo and out the intake. It's a lot more useful on manuals where you're on and off the gas a lot to shift, but it will put less stress on your turbo and give you quicker response when you let off the gas and get back on it.
A popoff valve is similar, but it's only controlled by spring pressure. When the pressure in your intake gets above the spring's pressure, it vents. You could have a 20psi POV on your stock truck, and (assuming it works properly) you'd have some extra safety in that your engine could never see over 20psi, because the POV would vent it first.
You still need a wastegate of some sort. The stock setup is really too small for our trucks. Porting it helps, or you can switch to a good internal (like PTE) or get an external (like Tial). The wastegate controls how much exhaust gas is let around the turbo. This lets the turbo stay spinning at its optimum speed. You could use a POV to control boost, but the turbo would basically be spinning uncontrollably, leading to lower efficiency.
A popoff valve is similar, but it's only controlled by spring pressure. When the pressure in your intake gets above the spring's pressure, it vents. You could have a 20psi POV on your stock truck, and (assuming it works properly) you'd have some extra safety in that your engine could never see over 20psi, because the POV would vent it first.
You still need a wastegate of some sort. The stock setup is really too small for our trucks. Porting it helps, or you can switch to a good internal (like PTE) or get an external (like Tial). The wastegate controls how much exhaust gas is let around the turbo. This lets the turbo stay spinning at its optimum speed. You could use a POV to control boost, but the turbo would basically be spinning uncontrollably, leading to lower efficiency.
White97SVT
Member
The pipe and the BOV look something like this
SY2932
Administrator
I believe the "gold" is actually good old FeO2 (rust). The problem is the flanges for the HKS BOV's are made of either mild steel or aluminum. My turbo to intercooler pipe is stainless steel so, had to go with the mild steel flange. It WILL rust unless you keep a coating of rust preventative on it. I usually wipe mine once a week and use a cotton swab to get to the welds. Makes me wish I had an aluminum turbo to IC pipe instead... HTH's
Mike Campbell
Vaders Sy
Donating Member
Kinda of off the topic but...
For the ATR intercooler and PTE kit is there a different turbo to intercooler pipe included in one of those kits or do I have to find the pipe myself? I will be installing a BOV as well. In short, just wanted to know if the stock pipe will work or do I need a different turbo to intercooler pipe?
For the ATR intercooler and PTE kit is there a different turbo to intercooler pipe included in one of those kits or do I have to find the pipe myself? I will be installing a BOV as well. In short, just wanted to know if the stock pipe will work or do I need a different turbo to intercooler pipe?
syclonekid43
New member
yeah thats his truck. i was talking to him the other day about it. i forgot where he said he got that. i want to do the same to the sy once its back on the road.AlaskaTy said: