Is the underside open between the bumper and the front of the radiator; that could be blocked. Where is the air intake getting air; warmer air under the hood would warm quicker than a cold air intake from outside the engine bay.
Ahh yes,,, another reminder of future projects I have yet to accomplish!!!
Obviously these entail more work than throwing a piece of cardboard over the engine, and I may do them this summer. Right now I have the back of the grill blocked with some Coroplast, and the idea of a bellypan/engine compartment block is appealing. AFA the air intake I do have it drawing from the engine compartment, no special ducting though.
I'm pretty happy with the 40 MPG I'm getting on a 06 corolla with an AT, but yeah, I could do more.....
Most cars don't even have the insulation. Out of all the ones I've owned, one has had it, and it fell apart in the end anyhow.
With or without it, it will make little difference. I'd probably remove it to save some lbs.
It's funny you say that, because all of the cars I have owned (except hondas) have had them, most were in the process of falling out though.
I would imagine the only mpg advantage these can provide, is a slight amount of thermal insulation for the engine on short engine off stops. I was browsing around an insight forum, and they actually had lovely coat like things made for their engines. That would be the way to go, way less noise, and much faster warm ups. Early sensor death though?
i saw a on youtube on "how to hypermile" and they said to add insulation under the hood. and it looked like just a some foil and duck tape. here's the link http://www.youtube.com/watch?v=TfGFgXTpQW4
has anyone done this?
"But Doc, we dont' have enough road to get it up to 88 miles per hour"