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Compressor surge .vs blow-off valve

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Old 10-13-2007, 01:30 AM
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Compressor surge .vs blow-off valve

Is a BOV really required on a Greddy turbo'ed RX-8?

I know they did not include one in the kit but the kit was setup for 6psi. Would I need one if I up the boost?

I much prefer the sound of compressor surge over BOV.
Old 10-13-2007, 08:47 AM
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Originally Posted by xenon
Is a BOV really required on a Greddy turbo'ed RX-8?

I know they did not include one in the kit but the kit was setup for 6psi. Would I need one if I up the boost?

I much prefer the sound of compressor surge over BOV.
How much do you enjoy the sound of rebuilding your turbo? Thats what your going to be doing if you don't use a BOV.
Old 10-13-2007, 09:02 AM
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All turbo should get a BOV. So the turbo itself wont die in 1000 miles.
Old 10-13-2007, 10:32 AM
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Crap.

So why would Greddy not include one in the kit?

I already got a brand new Tial BOV for free so I am not complaining.

I am just curious why they didint feel the need to include it.

Also, how much will the BOV effect the stock base map?
Old 10-13-2007, 10:37 AM
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yeah, you'll want a BOV. If you recirculate it, not much change is needed.

If you don't have one yet, I recommend this:

https://www.rx8club.com/series-i-aftermarket-performance-modifications-23/review-synchronic-blow-off-valve-bov-without-diaphrams-122513/


Any other BOV and you will get some surge at low rpm or leaks at high.
Old 10-13-2007, 10:59 AM
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Originally Posted by mysql101
yeah, you'll want a BOV. If you recirculate it, not much change is needed.

If you don't have one yet, I recommend this:

https://www.rx8club.com/showthread.php?t=122513


Any other BOV and you will get some surge at low rpm or leaks at high.
Thats cool but I already have a Tial BOV.

Now if I install it to recirculate, does that makes the BOV more quiet?
Old 10-13-2007, 12:07 PM
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Yeah. Chances you will be unable to hear anything
Old 10-13-2007, 12:23 PM
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Originally Posted by mysql101
Yeah. Chances you will be unable to hear anything
Well that sux.

Obviously if I vent to atmosphere I will have problems.

When I upgrade to the emanage ultamate, will it matter?
Old 10-13-2007, 01:30 PM
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You can get away without recirculating with the EMU. Just needs a little tweaking. I don't know much about blue since I never used it.
Old 10-13-2007, 03:05 PM
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Originally Posted by mysql101
You can get away without recirculating with the EMU. Just needs a little tweaking. I don't know much about blue since I never used it.
What exactly do I tell my tuner to "tweak" on the emanage ultimate?
Old 10-13-2007, 03:08 PM
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if you don't adjust anything, the car will bog down as you shift, and you'll be blowing a lot of flames because it expects air that you just released via bov ... so you end up with too much fuel and not enough air in the engine.
Old 10-18-2007, 01:39 PM
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Originally Posted by mysql101
Yeah. Chances you will be unable to hear anything

If you have hard piping (intake) you should still get some sound.
Old 10-19-2007, 03:16 PM
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this is a funny thread
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