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Discussion Starter · #1 ·
After reading about ArtV's idea of the Greddy relief valve seen here:<br><IMG SRC="http://www.thezstore.com/store/graphics/00000001/large102131.jpg" BORDER="0"><br>I decided that I would feel a lot better about chipping my car if I had one myself. So I decided to take the plunge an buy one only to find out that Greddy has discontinued this product and they are nearly impossible to find. This got me bummed but then I realized what is a relief valve but a blow off valve without the vacuum line attachment. So I decided to try a simple mod to a cheap blow off valve to see if I could modify it to work as a relief valve.<br>So I purchased a universal blow off valve here: <A HREF="http://www.siliconeintakes.com/product_info.php?cPath=11&products_id=496&osCsid=4a9a9c89e388661f5c3bffc14b97eb50" TARGET="_blank">http://www.siliconeintakes.com...7eb50</A><br><IMG SRC="http://www.siliconeintakes.com/images/product/bov_type10_picture.jpg" BORDER="0"><p>Along with an appropriately sized T coupler found here: <A HREF="http://www.siliconeintakes.com/product_info.php?cPath=11&products_id=455&osCsid=4a9a9c89e388661f5c3bffc14b97eb50" TARGET="_blank">http://www.siliconeintakes.com...7eb50</A><br><IMG SRC="http://www.siliconeintakes.com/images/product/silicone_tpipe_black_picture.jpg" BORDER="0"><p>I then got the appropriate fittings to hook the BOV to my air compressor. The two washers that came with the valve are shown at the bottom. Then 3 washers I had lying around that are almost identical are shown above them.<br><IMG SRC="http://i227.photobucket.com/albums/dd314/ladiesman28803/0721091522.jpg" BORDER="0"><p>I pressure tested the blow off valve with its heaviest spring and the two washers that it came with. At this max pressure setting the valve would open at around 20 psi (its a pretty low pressure BOV) without vacuum assistance. So this wasn't high enough for the needs of a chipped car if I wanted to vent off boost spikes around 22-23 psi. So I stuck two more washers in seen here.<br><IMG SRC="http://i227.photobucket.com/albums/dd314/ladiesman28803/0721091523.jpg" BORDER="0"><br>That set the valve to about 23psi opening pressure. Just about where I want it.<p>Because I have an Phmic the installation is very easy. Its practically a drop in mod. You simply replace a coupler that comes with Phuz's kit with the T coupler. I replaced the one connecting the temperature sensor pipe to the plastic, pre-intake manifold pipe that comes with the car. This allows the BOV to be pretty accessible while also hidden below the filter box's intake funnel. In the pictures below the intake funnel has been removed for installation.<br><IMG SRC="http://i227.photobucket.com/albums/dd314/ladiesman28803/0721091621.jpg" BORDER="0"><p><IMG SRC="http://i227.photobucket.com/albums/dd314/ladiesman28803/0721091622.jpg" BORDER="0"><p>So far it works well. Holds boost on an unchipped car perfectly with no leaks. I have chipped the car and have verified that the BOV does actually work in releasing boost spikes. I have a boost gauge on order (IPD's gauge is currently backordered) and will continue with testing when that comes to make sure it is spot on. Opinions? <p>
 

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Re: New do it yourself relief valve mod (xman03)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>xman03</b> »</i></TD></TR><TR><TD CLASS="quote">I don't see any use for it.</TD></TR></TABLE><p>If done properly, it is extra insurance against the boost spikes that are not uncommon on a tuned car.
 

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Discussion Starter · #4 ·
It may seem a little overkill with the consistency of electronic boost control now a days. But if I go with the upgraded turbo later a boost spike could cause some serious damage. 100 bucks is a small price to pay for engine and turbo safety IMO. And plus I'm really bored.
 

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Hmm I like that.<p>I get boost spikes still.... 1.5bar+ sometimes.
 

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Re: (chinaonnitrous1)

Nice work Rho. Nice display of ingenuity there, my good man, in piecing that together and figuring where to put it.<p>Whether or not others need it matters not. If you want the extra insurance and keep that thing installed, then it serves its purpose.<p>good job <IMG NAME="icon" SRC="http://www.vwvortex.com/vwbb/embeer.gif" BORDER="0">
 

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Re: (Rho)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>Rho</b> »</i></TD></TR><TR><TD CLASS="quote">It may seem a little overkill with the consistency of electronic boost control now a days. But if I go with the upgraded turbo later a boost spike could cause some serious damage. 100 bucks is a small price to pay for engine and turbo safety IMO. <B>And plus I'm really bored</B>. </TD></TR></TABLE><p>LOL
 

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Good job. I was planning on doing this as well, but my boost has been pretty consistent. When I do the turbo upgrade, I'm definitely doing this type of setup as well.
 

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If you guys need anything from Siliconeintakes, let me know. I get a discount from them and I am sure they would do greater for a group buy of a particular part.
 

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Re: (phuz)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD><i>Quote, originally posted by <b>phuz</b> »</i></TD></TR><TR><TD CLASS="quote">If you guys need anything from Siliconeintakes, let me know. I get a discount from them and I am sure they would do greater for a group buy of a particular part.</TD></TR></TABLE><p>In for one.
 

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there should be a forum with a list of members who have a connection and don't mind spreading it out. such as the phuz here.
 

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Discussion Starter · #12 ·
Yeah and if anyone is interested in trying this valve: <A HREF="http://www.siliconeintakes.com/product_info.php?cPath=11&products_id=485&osCsid=cc862385548d329ed0ac16a97d69a4f9" TARGET="_blank">http://www.siliconeintakes.com...9a4f9</A><br><IMG SRC="http://www.siliconeintakes.com/images/product/bov_type13_picture.jpg" BORDER="0"><br>that could be interesting. It is very much similar in style to the Greddy relief valve and is cheaper than the one I bought. The only reason I went with the universal blow off valve is because it 1) has higher rated pressure 2) fits a 1" T coupler and 3) I knew exactly how that valve worked and I'm not positive I know the internals of this non-recirculating valve. If you could find a 1.5" T coupler then it would probably be the valve of choice for most people if we could get it to hold 23 psi since it is substantially smaller than the one I have.
 
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