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Running without a BOV...can I do it?

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Old 13 March 2009, 07:41 PM
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ScaldedCat
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Default Running without a BOV...can I do it?

I'm in the process of fitting my FMIC (nearly done), but the BOV I ordered hasn't arrived yet.

My wife's Micra decided to chew a piston yesterday, so we are currently car-less and this will be a problem getting her to work on Monday. I can't reuse the standard BOV as the fitting/flange is completely incompatible.

Is there any way I can run the Impreza without a BOV if I block the pipe on the intercooler that goes to the BOV as well as the one from the turbo (and just drive off-boost) or leave one 'open'?

Apologies for such a daft question, but I'm looking for options that don't involve using taxis until my BOV arrives!
Old 13 March 2009, 07:54 PM
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mit
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Yeah, a few people run without a dv, just block the pipes off till your new one arrives.
Old 13 March 2009, 08:26 PM
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mike h
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I have no dump valve, try it, you may like the sound you get.
Old 13 March 2009, 08:28 PM
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EddScott
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I want to do the same but I've read on here that the VF series turbos can't cope without a DV whereas the TD series can.

Is this right?
Old 13 March 2009, 08:34 PM
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morpheous
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146000 fm/ic tdo5 no probs 330/300
Old 13 March 2009, 09:58 PM
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The Rig
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Is the noise of no dump valve better than having a dump valve ?

ive got a td05 with a hks sqqv blah blah dump valve,wondering which sound is better ?

is it just a case of blanking off the pipe going to the d/v ? MY95

sorry to hijack
Old 13 March 2009, 10:18 PM
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mike h
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You get the "chattering" sound when you lift off the loud pedal. I prefer it to having a dump valve.
Old 13 March 2009, 10:26 PM
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EddScott
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Did you just take it off or did you have it mapped for it?
Old 13 March 2009, 10:29 PM
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mike h
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It was like it when i bought the car, but I've had the car mapped by JGM since.
Old 13 March 2009, 10:35 PM
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stevie1982
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i have heard that too about the vf range no favouring no dumpvlave.

you will be fine for a for a few days mate. you may like it but check with a tuner such as API , SUBARU4YOU or similar and see what they say over the vf range and no valve. on my old uk turbo i ran with no valve for a few months but ended up putting a sti re-circ on.
Old 13 March 2009, 10:43 PM
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EddScott
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Going to API on Monday but feel a bit silly saying "I want to take the dump valve off because I'll feel that little bit more like Petter Solberg on the way home."

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