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Dump Valve Problem?
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Old 30 Jul 2008, 12:06 AM   #1 (permalink)
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Dump Valve Problem?

Hi all, tried searching but couldn't find any answers on this.

recently installed a new "Le Mans" Group A Twin Piston Atmospheric Dump Valve on my my01 bug eye. sometimes the valve is loud and other times its quieter when venting at the same revs. also i notice when the valve does blow off loudly, when i select the next gear, before i depress the clutch, the volume of the valve goes from loud to quiet in mid dump. the dump seems retarded and i have noticed that the rev counter momentarily jumps up before coming down when i lift off.

Any ideas would be greatly Appreciated
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Old 30 Jul 2008, 04:20 PM   #2 (permalink)
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Re: Dump Valve Problem?

best bet is to take it of mate and put it in the bingo back to your oe one
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Old 31 Jul 2008, 05:53 PM   #3 (permalink)
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Re: Dump Valve Problem?

Replaced it with the oem valve and everything seems to be fine now. Supplier of the le mans valve said they tested it and it was ok.... = no refund :-(
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Old 31 Jul 2008, 09:49 PM   #4 (permalink)
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Re: Dump Valve Problem?

how did they test it?
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Old 01 Aug 2008, 08:14 AM   #5 (permalink)
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Re: Dump Valve Problem?

Unless they cooperate I suggest we all avoid the company, post their details and then let em know. Power to the people !!
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Old 01 Aug 2008, 08:14 AM   #6 (permalink)
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Re: Dump Valve Problem?

I'm not an anarchist, honest !!
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Old 03 Aug 2008, 08:22 PM   #7 (permalink)
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Re: Dump Valve Problem?

The company i bought it from agreed to send it back, its Le Mans themselves thats no wantin to play ball. i think they push the piston in and cover the vacume pipe hole then when the pipe is released the piston springs back out. or somethin along them lines. this is what they were told to do by the tech guy at Le Mans. Its now been sent back to them for testing but i think im just gonna Stick OE
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Old 04 Aug 2008, 07:08 AM   #8 (permalink)
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Re: Dump Valve Problem?

Was this dump Valve for a "new age" Impreza? I can only find one made for the
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Impreza Turbo up to 1997 - Impreza Turbo 1997 - 1999
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