Due to the NSX's very small oil pan and transverse engine layout, it really doesn't need or will benefit from an overly complex baffle design. If you increase the capacity (which is another very important thing for high demand uses -tracked cars, turboed cars, turboed track cars), then you do need something more complex than the typical top plate.
Top plate baffle designs (SOS & STMPO/FXMD) are proven and quite effective at preventing oil from sloshing up on the 'shelf' of the left side of the oil pan during long right-hand corners. Unfortunately most of these baffles are not seam-welded and often have a gap where the plate meets this 'shelf' -thus greatly reducing the effectiveness of keeping oil in the deep sump in right hand corners. Ideally, you want the top plate to be flush against and seam-welded to the 'shelf' (like in the STMPO-FXMD baffle). While most baffles aren't ideal in this regard, all of them do a great job at allowing oil to drain back into the sump, so I disagree with your comments of 'restricting reflood'.
Taken from an old thread: (this is an informational post and NOT a for sale post since FXMD and STMPO no longer sells products. It's not too hard to install a SOS or make a pan like this):
STMPO-FXMD Race Series Oil Pan Baffle
The STMPO Race Products-FXMD Race Series Oil Pan Baffle is Made in the USA out of lazer-cut steel and reduces oil starvation.
The NSX's oil pan has no baffling from the factory and it is known to have
oil starvation in a stock car.
The STMPO baffle is designed with thin slots that
allow oil to drain back into the sump without restriction while greatly reducing and slowing down the oil from escaping the pickup and pooling in the upper 'ledge'. The tolerances of this baffle are very tight which ensures a good seal with the pan to keep the oil where it needs to be.
"Since it is possible to have oil starvation in a stock car on street tires, an oil pan baffle is probably the best investment you can make to ensure the safety of your motor for both street or track use. The cost of this $45 baffle (plus needed labor to drop the pan and weld it in) is more than worth the value of your $10-25K stock or built motor. I highly recommend this to anyone who tracks their car and feel its a great investment for any NSX owner" - Billy Johnson
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I think the above baffle design is more than enough for 95% of the people out there, however to take it to the next level and offer something better, I would be more interested in a pan with an 2-3 quart capacity increase -which would require the more complex baffling that you're talking about.
