How do I properly crush a 1g BOV?

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Re: How do I properly crush a 1g BOV?

Post by talonkid93 on Wed Feb 20, 2008 9:45 pm

I need to crush my BOV so it can hold more boost until I get my greddy type S. I need to look up how to crush it properly though. Alot of people told me that once its crushed it sounds a hell of alot better.
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Re: How do I properly crush a 1g BOV?

Post by Gdmbat85 on Thu Feb 21, 2008 12:22 am

Crush properly? Is there a proper way to crush something? Here's how I would do it. Jack up one of the front tires on my car and slide a piece of wood under it. Then, put the BOV ontop of that piece of wood to prevent scratching the surface. Then, just slowly lower the tire onto the top of the BOV until it crushes in.

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Re: How do I properly crush a 1g BOV?

Post by zoomzoom6 on Thu Feb 21, 2008 12:55 am

Or... hammer + 1g BOV = crushed BOV Very Happy

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Re: How do I properly crush a 1g BOV?

Post by talonkid93 on Thu Feb 21, 2008 2:50 am

or put it in a vicegrip
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Re: How do I properly crush a 1g BOV?

Post by TurboMike on Sun Feb 24, 2008 11:21 pm

Best way to do it is in a vice. If you use a vice grip you'd need a way of pressing on the whole surface of the top of it so its flat and you dont dent it. You also need the surface to stay even to keep the spring straight and want the walls of the BOV to crush evenly. I wouldnt do it with vice grips.

Theres a spring inside, and the purpose of crushing the metal top of the BOV is to compress the spring further so it opens later (holds more boost). if you crush it too much it will never open or break (the spring or bladder inside). Some stock BOVs will only hold 14psi, some are good to 18psi. So the proper way to do it is to put it on a vac tester and crush it until it holds the boost you run, or about 21psi to be safe. Who owns a vac tester tho? A good rule of thumb is to crush it until the nipple (on the top part you're crushing) is about 2 or 3mm from the rim of the bottom part. Keep in mind if you break it you have no ride until you get a new one and are out $100.

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Re: How do I properly crush a 1g BOV?

Post by zoomzoom6 on Mon Feb 25, 2008 12:42 am

$100?!?!!! I got mine for like $12.

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Re: How do I properly crush a 1g BOV?

Post by TurboMike on Mon Feb 25, 2008 2:18 am

A brand new BOV is $100.

Used you could get anything for free.

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Re: How do I properly crush a 1g BOV?

Post by AWD ATTK on Sun Mar 02, 2008 4:00 am

As TurboMike said, use a standard shop vice that will close evenly. This is what I did:

1- get a few nickles or pennies
2- put the BOV in a vice and slide the coins on top of BOV, stack 2 or 3 in center.
4- compress vice very slowly until there is a very slight divot, a few MMs

you should compress the BOV about 2-3 pennies width, go very slowly.
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