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Dave,Lately you’re the most active NSX R&D guy, so I’m going to plant a seed with you:Most people on this forum likely know about the valve cover/oil drain issue. (By the way with the mod as I described it, you never get oil in the breather so it doesn’t need to drain back) But the oil pan fitting tied to the breather may be beneficial for other reasons…It’s my contention that blow-by or even worse boosted blow-by can pressurize the crankcase at a faster rate then exhausted through the (normal) breather. This pressure is counter productive against the bottoms of the pistons and this depletes horsepower. The other side effect is that this pressure probably slows the flow of oil back down to the oil pan. When in VTEC oil spews out the rocker shafts and starts to fill the valve covers, the same passages that would relive the crank case pressure out the breather or PCV, are used to flow the oil back to the pan. If your in extended VTEC (As I always try to do when racing), the valve covers will consume the majority of the oil, if crank case pressure is slowing the flow back then the problem will worsen the longer your in VTEC.Your tapped oil pan to breather would help relive that crank case pressure. And maybe one day you can experiment with an aftermarket vacuum pump. These pumps have been proven to increase HP in high-end drag cars, and should help our oil flow.
Dave,
Lately you’re the most active NSX R&D guy, so I’m going to plant a seed with you:
Most people on this forum likely know about the valve cover/oil drain issue. (By the way with the mod as I described it, you never get oil in the breather so it doesn’t need to drain back) But the oil pan fitting tied to the breather may be beneficial for other reasons…
It’s my contention that blow-by or even worse boosted blow-by can pressurize the crankcase at a faster rate then exhausted through the (normal) breather. This pressure is counter productive against the bottoms of the pistons and this depletes horsepower. The other side effect is that this pressure probably slows the flow of oil back down to the oil pan. When in VTEC oil spews out the rocker shafts and starts to fill the valve covers, the same passages that would relive the crank case pressure out the breather or PCV, are used to flow the oil back to the pan. If your in extended VTEC (As I always try to do when racing), the valve covers will consume the majority of the oil, if crank case pressure is slowing the flow back then the problem will worsen the longer your in VTEC.
Your tapped oil pan to breather would help relive that crank case pressure. And maybe one day you can experiment with an aftermarket vacuum pump. These pumps have been proven to increase HP in high-end drag cars, and should help our oil flow.
