Resolved What's the small hole on the under side of the 1G bov for?

[Captainredeyez]

Some questions I need to ask. What purpose does the small hole serve on the under side of the 1G bov? Also does it need to be free the flow into or out of the UICP? Reason I am asking is because I have adapted the 1G bov to fit the greddy flange on my UICP. However the small hole is blocked and can't really flow into the UICP. I notice a huge difference with the new aluminum piping but, when I begin to build boost it feels restrained. So can anyone tell me what could the problem be? Also if I am correct about this, I should readjust the BOV so that the tiny hole is free, or should I mod the BOV. Crush or the Dodge mod. Any suggestion are greatly appreciated.

 

[JusMX141]

The hole is for the 1G BOV's "quick release" feature. This feature is moved on valves with the Dodge Garage Mod done.

Here's the base of the 1G BOV I modded for a Greddy flange:

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You'll see in the photo how the portion of the valve with the quick release hole is stepped inward a little. This is so even if the valve is sealed against a flange, the air can still get to the quick release hole.

On the valve I modded, I plugged that hole for the Dodge Garage Mod. You MUST drill a hole in the side of the valve if you do this in order to give the air in the quick release chamber an escape route (the nipple on the side of the valve).

 

[Captainredeyez]

So was I correct about this? Also I'm guessing I should do this mod right?

 

[JusMX141]

How much boost are you planning on running?

The Dodge Garage Mod is intended for cars that consistently run 18+psi with a 1G BOV. If you run low boost on a Dodge Garage Modded BOV, it can release too slowly causing flutter and compressor surge.

 

[Captainredeyez]

Well I'm still running stock boost pressure but I plan on raising it to 15psi when my boost gauge gets here.

 

[JusMX141]

I don't think you should crush your valve OR do the Dodge Garage Mod.

Make sure the gasket doesn't interfere with the Quick Release hole on the bottom of your valve, and install it as normal.

 

[Captainredeyez]

Here are some pics of the bov and flange. I dont think the tiny hole is free to pass air through it. Could this be my problem, should I make a little passage connecting the hole to the valve? Like the last pic with the highlighted part

 

[JusMX141]

Yeah if you wanted to, you could use a die grinder to carefully notch a groove into the valve right where you have the yellow line drawn to carry airflow to the quick release chamber.

 

[Captainredeyez]

I have a die grinder, so i think i will do that. I hope this fixes my problem.

 

[MrBoxx]

Please don't bump your posts. If you have a die grinder and a very steady hand, you can groove the base to allow air to get to the hole.

 

[Captainredeyez]

Sorry bout that, won't happen again. I did grind a groove on the bov and I'm putting eveything back together as we speak. Hopefully this will fix the problem.

 

[Captainredeyez]

Problem solved. Beings that the boost source hole was unable flow, it was restricted. I would build boost but wouldn't feel any pull from the car. I used a dremel to carve a groove into the bottom of the BOV and the flange. By doing this I created a tunnel for the air needed to pass through. Everything is working as it should be now.

 

[Defiant]

That shouldn't have been needed- the housing is cast with that depression in the base so that it has the passage open, and the gasket is shaped to keep it open. Still, if it works, it works.

 

[Captainredeyez]

That shouldn't have been needed- the housing is cast with that depression in the base so that it has the passage open, and the gasket is shaped to keep it open. Still, if it works, it works.

I agree with you 100% but for some reason it wasn't. In any case like I have said, grooved it out and now it works. The difference btw not having and having it is like night and day. Crazy!