blowoff valve
- Thread starter NecroWolf
- Start date
VermontTy
Support Our Troops
Re: blowoff valve
It's all preference. Some will argue that they are not required unless you've got a big build, but I have a bone stock truck, and still want one to get rid of the turbo flutter when I let off at 15lb. (Flutter is what happens when you close the throttle body, but still have high pressure after the turbo. Instead of going out the BOV, it has nowhere to go but back through the turbo.) Flutter isn't an incredibly destructive thing, but over time, will ruin a turbo.
It's all preference. Some will argue that they are not required unless you've got a big build, but I have a bone stock truck, and still want one to get rid of the turbo flutter when I let off at 15lb. (Flutter is what happens when you close the throttle body, but still have high pressure after the turbo. Instead of going out the BOV, it has nowhere to go but back through the turbo.) Flutter isn't an incredibly destructive thing, but over time, will ruin a turbo.
Flyin Ryan
hated cuz he drives fords
Re: blowoff valve
the way I see it... it's cheap insurance on your turbo.. do I have one? Nope but will eventually pick one up once my new turbo is installed for that "cheap insurance" factor.
the way I see it... it's cheap insurance on your turbo.. do I have one? Nope but will eventually pick one up once my new turbo is installed for that "cheap insurance" factor.
SY2932
Administrator
Re: blowoff valve
Like many others, I am running a HKS Super Sequential on my truck:
The stock turbo spins at 130,000 to 140,000 RPM's at full boost. Trying to "stall" the compressor wheel anytime you get off the gas and the throttle blades close didn't seem like a good idea to me. I know one owner who had the nut that held his compressor wheel spin off his aftermarket turbo as a result of the rapid deceleration from this... IMHO if blow off valves weren't so pricey, more people would have them. Hard to justify spending a few hundred dollars for something that *may* prolong the life of your turbo. Especially when there are lots of trucks out there without them that are still running fine with no problems. Strictly a personal choice to run one or not.
Like many others, I am running a HKS Super Sequential on my truck:
The stock turbo spins at 130,000 to 140,000 RPM's at full boost. Trying to "stall" the compressor wheel anytime you get off the gas and the throttle blades close didn't seem like a good idea to me. I know one owner who had the nut that held his compressor wheel spin off his aftermarket turbo as a result of the rapid deceleration from this... IMHO if blow off valves weren't so pricey, more people would have them. Hard to justify spending a few hundred dollars for something that *may* prolong the life of your turbo. Especially when there are lots of trucks out there without them that are still running fine with no problems. Strictly a personal choice to run one or not.
Jer
Don't taze me bro!
Re: blowoff valve
If someone thinks ~$200 is too much to spend on a car part then they probably shouldn't own a SyTy to begin with. I firmly believe in them personally and am not sure how people can argue against them being any good.
On that note, I have a brand new GReddy blow off valve for sale in the for sale section if anyone is interested. It's rate at 25psi and I'm going to be running more which I determined after I bought it.
SY2932 said:
If someone thinks ~$200 is too much to spend on a car part then they probably shouldn't own a SyTy to begin with. I firmly believe in them personally and am not sure how people can argue against them being any good.
On that note, I have a brand new GReddy blow off valve for sale in the for sale section if anyone is interested. It's rate at 25psi and I'm going to be running more which I determined after I bought it.
BigBadSmoosh
Picking fights on I-65 since 2013
Re: blowoff valve
does anyone make a "quiet" blow-off valve..
personally I like the bird under the hood sound when you let off the gas.. and Im not a big fan of the blow off valve.. Aren't there valves that release the gas from behind the turbo and put it back into the intake?
does anyone make a "quiet" blow-off valve..
personally I like the bird under the hood sound when you let off the gas.. and Im not a big fan of the blow off valve.. Aren't there valves that release the gas from behind the turbo and put it back into the intake?
Jer
Don't taze me bro!
Re: blowoff valve
The dual BOV set-up is to make sure they are able to expel enough air quick enough to avoid compressor surge by allowing for more pressure to bleed off quicker due to larger valve area (double with dual). The spring/diaphragm is what determines how much boost they can hold before they leak. My guess is you were on the verge of leaking. Anything higher and you would have run into issues with leaking. Two BOVs will not help that. Not to mention two Type S BOVs would have cost more than 1 Type R and still not hold as much boost. There's still the same amount of pressure on each one under boost regardless of how many you have. The Type R also has a larger valve to be able to release more pressure quicker.
spooldup said:
The dual BOV set-up is to make sure they are able to expel enough air quick enough to avoid compressor surge by allowing for more pressure to bleed off quicker due to larger valve area (double with dual). The spring/diaphragm is what determines how much boost they can hold before they leak. My guess is you were on the verge of leaking. Anything higher and you would have run into issues with leaking. Two BOVs will not help that. Not to mention two Type S BOVs would have cost more than 1 Type R and still not hold as much boost. There's still the same amount of pressure on each one under boost regardless of how many you have. The Type R also has a larger valve to be able to release more pressure quicker.