Heat shield / sound insulation is under Honda's rubber. It makes little measurable difference above or below, as I've moved it around.
I'm not disputing what you're saying . . . just wondering if you took measurements both ways to quantify any difference. Otherwise there are a number of factors, like driving conditions and outside air temperature that could factor in. My butt's sensitive, but not all that precise!
As to the question I posed a couple of posts back about taking off the intake restriction on the bilge blower:
Before, stock condition, powered by a 13.3 volt lithium battery, current draw is 3.8 amps. Both intake and exhaust in free air (no restrictions) peak output flow of 36 mph measured at the opening in several positions (center to edge) and as far as 6" away.
After cutting off intake restriction, measured peak flow is 30 mph. In picture below, about the only advantage of cutting off the intake would be less intake restriction. Conclusion, on this particular bilge blower, cutting off the intake is not all that good an idea! I've had bigger failures, and way bigger successes (!!!), so I won't sweat this one.
The new blower bracket is quick and easy to remove, but in any case doesn't block the sub-trans fill opening.