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TheRedSlantnose TheRedSlantnose is offline
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Join Date: Feb 2014
Location: Keller, TX
Posts: 485
Originally Posted by gumba View Post
So which bov should I get?
Doesn't have to be a blow off valve, it can be a bypass (diverter) valve if you don't want the "psss" noise, but that's your choice. The one on my 930 is a Forge BOV, and my 951 has a TurboXS BOV. Both of them are good, but the one on my 951 is more responsive since it's closer to the throttle. The most common BOV I've seen, especially in high-performance upgrades is the Tial BOV. If you want a whistling noise, you can get an HKS SSQV BOV, but the HKS BOV isn't commonly used in Porsches for some reason.

When getting a BOV or bypass valve, be sure to check its maximum boost capacity because if you're running more boost than the BOV or bypass valve is designed to handle, the piston inside would be forced open at full boost, causing a sudden loss of power. Though seeing you're running a modest 0.9 bar of boost, I'm sure many BOV's and bypass valves on the market can handle that.

Good luck and have fun with your car!

1987 930 Slantnose Cabriolet, 545 hp, Guards Red- Weekend cruiser
1986 944 Turbo (951), 350+hp, Guards Red- Track car
2005 Toyota Tundra SR5 Double Cab 4x4, stock 282 hp, Silver- Daily driver
Old 04-22-2014, 07:50 PM
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