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SVTPerformance's Chain of Restaurants
The Distillery
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<blockquote data-quote="Turbo98" data-source="post: 10772020" data-attributes="member: 39787"><p>I had an open breather on the pass. side, tube to intake on the driver's side. When I removed the intake there was oil all inside the intake and as mentioned, I don't like that idea. Plus it reduces the knock resistance slightly as mentioned also. So I just switched to open breathers (no can) on both sides so we'll see how it does. </p><p></p><p>A couple other observations when looking into this. With the tube to intake with forced induction, there is the need for a really good one-way check valve or you will pressurize the crankcase. There is also the possibility that at idle and part throttle, the vacuum can pull air into the open breather on the one side, through the engine, and introduce un-metered air into the intake which is like a vacuum leak. I wanted to eliminate the intake from the loop. Also, with forced induction, the tube to intake is meaningless at WOT. At WOT, the check valve is shut so no gas can escape on the driver's side when you need it most. It only functions on that side when you are at idle or part throttle. So I think open is better on both side when running FI especially.</p><p></p><p>Edit: BTW, the tube to intake with FI theory applies mostly to a blow through MAF set-up. I'm not sure where the tube attached to the intake on the '03/'04's but I imagine it's before the boosted area of the intake.</p></blockquote><p></p>
[QUOTE="Turbo98, post: 10772020, member: 39787"] I had an open breather on the pass. side, tube to intake on the driver's side. When I removed the intake there was oil all inside the intake and as mentioned, I don't like that idea. Plus it reduces the knock resistance slightly as mentioned also. So I just switched to open breathers (no can) on both sides so we'll see how it does. A couple other observations when looking into this. With the tube to intake with forced induction, there is the need for a really good one-way check valve or you will pressurize the crankcase. There is also the possibility that at idle and part throttle, the vacuum can pull air into the open breather on the one side, through the engine, and introduce un-metered air into the intake which is like a vacuum leak. I wanted to eliminate the intake from the loop. Also, with forced induction, the tube to intake is meaningless at WOT. At WOT, the check valve is shut so no gas can escape on the driver's side when you need it most. It only functions on that side when you are at idle or part throttle. So I think open is better on both side when running FI especially. Edit: BTW, the tube to intake with FI theory applies mostly to a blow through MAF set-up. I'm not sure where the tube attached to the intake on the '03/'04's but I imagine it's before the boosted area of the intake. [/QUOTE]
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