Full under body panel for 10% fuel efficiency gain. (about 20% aero drag reduction)

[mikeyjd]

the whole under the car shield would just be a pain for when you do an oil change or for critters to hides in and when one does and the exhaust kills it get ready for you car to smell really bad.
fftheair:fftheair::error::error:ops:ops::dog::blob6::blob6::blob6::munky2::munky2::puk e::puke::puke:

takes about 10 extra minutes to take it off and put it back on. so far no critter deaths hmmmmmm

[sketchman]

I've felt a noticeable difference with every mod I've done thus far. I did similar mods to my 1ton diesel truck couldn't tell at all. These vehicles are so small that even slight modification like taking wind shield wipers off can be felt.

Good to know. Can't wait to fill up now.

[RhodeStiva]

the whole under the car shield would just be a pain for when you do an oil change or for critters to hides in and when one does and the exhaust kills it get ready for you car to smell really bad.
fftheair:fftheair::error::error:ops:ops::dog::blob6::blob6::blob6::munky2::munky2::puk e::puke::puke:

[mikeyjd]

^That was part of my reasoning in doing it. Lessen air going in, and give what does go in a place to go that's better than under the car. I just didn't expect to actually feel any difference.

I've felt a noticeable difference with every mod I've done thus far. I did similar mods to my 1ton diesel truck couldn't tell at all. These vehicles are so small that even slight modification like taking wind shield wipers off can be felt.

[sketchman]

^That was part of my reasoning in doing it. Lessen air going in, and give what does go in a place to go that's better than under the car. I just didn't expect to actually feel any difference.

[Movin]

That out to lower the under hood pressure.

[sketchman]

Below is all I've done, and it seems to have a very noticeable effect. The old ricer staple hood prop and an upper grill block. I still haven't filled up to check it, but it seems like I can feel the difference already.
It just seems like a very tiny change to have made a noticeable driveability difference already.


Thoughts?

[mikeyjd]

Have you noticed any ease in maintaining speed with the aero mods? And if so, how much did it take to notice? I think I'm going nuts.

Yeah i have to use a much lighter foot on the pedal or else I speed up to 65 or 70 accidentally. It actually takes quite a bit of concentration but I've developed certain sitting postures that make constant throttle less difficult. I've been doing coast down test's for a couple months now on one of my main roads back toward home that rarely has anyone else on it. After adding the panel and the weight reduction stuff my car was still going 15mph at the stop sign where it stopped during the first coast downs. I moved my target engine shutoff point further back and at a lower speed and still hit the stop sign at around 5-7mph consistently. Why do you think you're going nuts?

I'm late in making comments but fiberglas pink (in and around the Cat and muffler) is 'glass based' and will melt and deform but if you can get hold of Roxul-brand batt insulation (Canadian-made) which is made of mineral slag material that stuff is impervious to heat and to soaking up moisture. It is (and I've used it for 20 years) primarily used for house wall and attic insulation because it's so much better than "pink" in every way, and you cut it (and shape it) with a bread knife.

Yeah I knew about this and I'm using the temp resistant/flame retarded white insulation.

[Bert]

I'm late in making comments but fiberglas pink (in and around the Cat and muffler) is 'glass based' and will melt and deform but if you can get hold of Roxul-brand batt insulation (Canadian-made) which is made of mineral slag material that stuff is impervious to heat and to soaking up moisture. It is (and I've used it for 20 years) primarily used for house wall and attic insulation because it's so much better than "pink" in every way, and you cut it (and shape it) with a bread knife.

[sketchman]

Have you noticed any ease in maintaining speed with the aero mods? And if so, how much did it take to notice? I think I'm going nuts.

[sketchman]

He didn't achieve a perfect setup, I don't think. He was still using a radiator, though a smaller one than stock, and I'm sure you couldn't touch the exhaust comfortably.

I saw a video of it running, and I have pics of the Delorean that was converted too. As well as having the patent saved. I'm a big fan. Wish he was still around.

Still impressive.

[FestYboy]

nearly!?! no, man, Smokey DID it, and to a homebrew turbo 2.5 Fiero (which still runs today) no less.... i'd have to pull an old hardrive to get you all the details, as i havn't seen them all from internet searches.

[sketchman]

^Ol Smoke nearly did that.

Use the heat, don't throw it away.

[Movin]

The ideal condition for mileage from a combustion engine would be a cool exhaust
and no cooling system necessary.

[mikeyjd]

I must have missed something..( not unusual for me ) In racing I understand the need for ducting air to prevent overheating, but for this project if heat is some where is it not the first priority to eliminate the lost energy creating the excess heat?

For my purposes the flow reduction keeps the engine at nice operating temps as opposed to running cool. With standard air flow the engine doesn't stay at optimal operating temps with the way I drive.