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pY's 99 Impreza L (GC4), road to STI
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Old 05-10-2019, 08:53 AM   #21
00redOBS
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Originally Posted by scruff3333 View Post
Car looks clean.
What's the bov mod accomplish?

Thanks.


From what I've read it helps the BPV hold higher boost pressures at the cost of disabling the over-boost protection. I have boost cut so I'm not worried. I've noticed that it only opens when I shift after building peak boost or its a whole lot less noticeable compared to an unmodified one which opened at the slightest amount of boost when shifting. I've had people confuse my BPV for a BOV in my previous car.


BOV is not an option. I'm not a fan of the noise they make.

Last edited by 00redOBS; 05-10-2019 at 08:55 AM..
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Old 05-10-2019, 03:14 PM   #22
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With the mod the BPV will hold up to 24psi allegedly.
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Old 05-10-2019, 06:36 PM   #23
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With the mod the BPV will hold up to 24psi allegedly.

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Originally Posted by mrsaturn7085 View Post
If you aren't going to run over 24 psi, then you don't need to change a thing. Buy a second USDM valve and mod it just to give it a shot, but don't drive yourself nuts trying to locate the older JDM valve.

Sounds like it might be higher. I'm assuming the stock BPV is good for 24psi.
Once I get the Flex Fuel finalized we'll see if it holds more than 24psi. Unfortunately there is only one place in Reno that has E85.
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Old 06-05-2019, 11:34 AM   #24
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Purchased a set of 03-04 JDM STI struts with JDM STI pink springs. Got tired of my tires scraping in turns and bumps (02-03 WRX SPT springs on 99 Impreza front struts and 03 Impreza rear struts).



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