Blow off valve on the hot side

[JOEY A]

It's a great setup for that, also most people who do that replace their turbo's every event as well. It's a different spending league than the average street car. Eventually compressor surge will have its way with his turbo's bearings. There's simply no escaping that.

4 daily driven months and nothing at all is wrong with his GT30R......


Also beats the hell out of the car

 

[daren_p]

My tial BOV is mounted on the hot side to the my intercooler intank. It was not my plan to mount it there. The guys that work on my car mounted it there when they were making my 3 UICP. They said that is where it should be to releive the most pressure off of the turbo. I do notice what sounds like compressure surge if I slowy let off of the gas under boost. It was real bad until I change springs the BOV. I think that maybe having the BOV on the UICP give you a faster response.

Im not saying which location is better either way, but your issue could just be the spring in your BOV or how its adjust & not related to placement. As with certian valves & depending on how my type RS is adjust I can get a good amount of surge from my evoIII when I slowly let off the gas & its mounted maybe 2 ' from the throttlebody.

As for the WRX with no bov, beating on it for four months I would expect it will eventually fail with this setup. A BB center section is much more resistant to the effects of surge compared to a normal thrust bearing, but I think it will still take its toll on the turbo.

 

[biglady112]

I run my tial on my hot pipe. I use an SCM6176BB. I was not willing to sacrafice the front of my car so I had to sacraficethe size of my intercooler. The core is 17"x12"x4". I put it on the hot side to help with heat soak. I must say that my endtank barely gets warm on the hotside after a full 1-4 pull. We also run 2 tials on the hotside on our race 2G. We run a GT4202 on that car and try to help with heat soak there as well. Same thing there. That core on that car is 32"x12"x4". No heat soak there. Both cars do experience some part throttle surge when letting off the gas slowly. But my friends small 16g with a greddy type s does the same thing and his is mounted on the UICP.

On our two cars if you let off quickly surge is not an issue. We run 7lb springs in the bov's. So they release fast. I do experience surge in my mirage however. But, I am on stock cams, intake and head. This turbo surged when it was on the 2G, but once a well flowing(ported) head and proper cams were put in, it went away. I am basically choking the turbo. I tried it just for grins and put the bov on the upper pipe in my mirage and surge was still there exactly the same. Same with the talon. It surged before it had two bov's on the SCM61.

I say go for it. I have had no issues and my intake charge thanks my I am sure. I am not heating up the intercooler with air while I am releasing air.

Steven