Ok im new to this some someone please help. I was wanting the HKS SSQV bov and I dont care about the intercooler. So if I get a brand new intercooler the bov wont fit right? I need to weld the flange on the piping? If so could someone please give me pics of what I do to mount the bov on the intercooler. Any help is appricated.
Thanks again
Mounting BOV to intercooler
Re: (boznuttz)
Actually you wana mount a bov as close to the turbo as possible. Honestly it doesnt mater that much, but the idea behind a BOV is to prevent compressor surge. So naturally you want to vent the air closest to the turbo first, so theres no chance of any compressed air finding its way back through the compressor.
I think you have some things confused Dlauth. The BOV is always mounted on the intercooler piping, not the intercooler itself. If you switch out your intercooler with roughly the same sized intercooler, so your piping still lines up your fine.
I think you have some things confused Dlauth. The BOV is always mounted on the intercooler piping, not the intercooler itself. If you switch out your intercooler with roughly the same sized intercooler, so your piping still lines up your fine.
Re: (480sx)
What I am saying is that if I get a brand new intercooler instead of a used one I will have to weld the flange on myself right?
Re: (Dlauth)
The Intercooler itself doesn't come with the flange...the intercooler piping does.
Re: (480sx)
When you mount it near the throttle body, it normally would be considered the best spot. When the throttle body shuts, air starts to build up at that one area and compress its way back to the turbocharger itself. A bov near the throttle body would relieve pressure at the source. If it is mounted close to the turbocharger, you can count on some compressor surge.
That makes no sense tho... why mount it close to the throttle body? Think about it, when you close the throttle body the air that didn't get in and between the BOV and throttle body will be released through BOV.. what about all the air in the intercooler and in on the hot side? wheres that air going to exit out? Thats right, right back into the turbo.. I feel the best spot for a BOV is on the hot pipe itself. Perferably right in the middle of the hot pipe.
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C-Kwik
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A BOV's job is to allow the turbo to flow enough air while maintaining some level of pressure so the turbo doesn't see surge. Any location between the TB and the turbo will relieve surge just fine. In many cases BOV mounting may be limited by available space. But my speculation is thast mounting it closer to the turbo has more advantages.
First, in a typical intercooled turbo set-up, there is a pressure drop across the intercooler. So a BOV mounted on the hot pipe will see greater pressure in the pipes (the actual amount will vary with intercooler design), which means for a given BOV opening event (lift and duration) it can flow more air. While the reality is that any properly sized BOV for a given turbo system should not have any problems flowing enough air, being able to flow more air on the onset of a pressure spike can reduce the peak pressure seen at the spike. If you mount it close to the throttle body, if there is a high pressure spike, the BOV needs to remove the excess pressure from right at the compressor exit moving air all the way through the rest of the plumbing. The response of the BOV where it matters most (at the compressor) is a little higher.
Second, A hot pipe mounted BOV will reduce some of the heat load placed on the intercooler. Intercoolers aren't typically able to exhcange heat at a constat rate with the ambient air. Instead, intercoolers are typically designed with some extra mass in it's walls so that it can store heat from the charge air even if it can't exhange heat as quickly with the ambient. Typical driving, even on race tracks have many occassions(braking and most turns) where you are not introducing more heat to the I/C, but the movement of the car is still allowing the I/C to transfer heat to ambient air. This could result in small improvements in the long run for performance, as I/C's will absorb more heat when they are cooler. This effect is particularly true with vented BOV's.
But as I stated already, any location will suffice for all intended purposes. The differences will be small and negligible. I wouldn't stress yourself too much with these details as in many cases, finding a place to mount it can be enough work already.
First, in a typical intercooled turbo set-up, there is a pressure drop across the intercooler. So a BOV mounted on the hot pipe will see greater pressure in the pipes (the actual amount will vary with intercooler design), which means for a given BOV opening event (lift and duration) it can flow more air. While the reality is that any properly sized BOV for a given turbo system should not have any problems flowing enough air, being able to flow more air on the onset of a pressure spike can reduce the peak pressure seen at the spike. If you mount it close to the throttle body, if there is a high pressure spike, the BOV needs to remove the excess pressure from right at the compressor exit moving air all the way through the rest of the plumbing. The response of the BOV where it matters most (at the compressor) is a little higher.
Second, A hot pipe mounted BOV will reduce some of the heat load placed on the intercooler. Intercoolers aren't typically able to exhcange heat at a constat rate with the ambient air. Instead, intercoolers are typically designed with some extra mass in it's walls so that it can store heat from the charge air even if it can't exhange heat as quickly with the ambient. Typical driving, even on race tracks have many occassions(braking and most turns) where you are not introducing more heat to the I/C, but the movement of the car is still allowing the I/C to transfer heat to ambient air. This could result in small improvements in the long run for performance, as I/C's will absorb more heat when they are cooler. This effect is particularly true with vented BOV's.
But as I stated already, any location will suffice for all intended purposes. The differences will be small and negligible. I wouldn't stress yourself too much with these details as in many cases, finding a place to mount it can be enough work already.