captainhook Posted February 2, 2010 Share Posted February 2, 2010 I used to have a GFB hybrid set to 50/50, and occasionally I did have some afterfire/popping when abruptly letting off the gas. I sold it and just stuck to my stock BPV and Cobb intake. Link to comment Share on other sites More sharing options...
WTBmoreboost Posted February 3, 2010 Share Posted February 3, 2010 didnt enjoy the MPG change so hooked it back up AVGd 16 ( cause i wanted to hear it ALLLL the time !!! ) but normally with some playing i get 20 Link to comment Share on other sites More sharing options...
Romuir Posted February 3, 2010 Share Posted February 3, 2010 I had Forge BOV on my Stage 4 WRX. My reason for using one was because of the size of the TurboXS Intercooler.....the Forge BOV was the only one that fit...the Sube stock dump valve would not fit....When installing the intercooler the Sube dump valve wouldn't clear the intake manifold. The Forge design uses a double spring arrangement which makes for very quick open and close duration. Plus their dump valves are warranted for life. When had the WRX tuned on the dyno after the TurboXS Intercooler/ BOV install....Dan at Curry's was able to tune it with no problems. Did not run rich...plugs always looked good. Just remember to get the right top spring....I thinks I used the yellow top spring (different colors for different pressure ranges)...I was running 17 lbs...the smaller lower spring stays the same. I really like their workmanship...all forged and CNC milled...Forge makes recirculating dump valves too for Subaru. My 2 cents Link to comment Share on other sites More sharing options...
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