I love it!

 

wow thats pretty cool, how much did you pay and how much will this help?

 

can't remember how much the engine/trans cover was but the other 2 long ones were about 60 for both. plus 2 new bolts.

i do feel theres a improvement on my gas mileage, not sure how much but i know it got better.

 

Interesting...

 

:yeahthat:

 

I love it. I've been waiting till someone did this. Very interested to see before and after MPG readings.

 

Taken from Wikipedia:

Acura NSX 90's Drag Coefficient - 0.32
Honda Civic Sedan Drag Coefficient - 0.31
Acura NSX 02+'s Drag Coefficient - 0.30
Toyota Prius Drag Coefficient - 0.29
Honda Civic Hybrid Drag Coefficient - 0.27

Pretty impressive numbers considering it's got less drag than both the Prius AND a 'supercar'.

Edit: Nevermind. The 2010 Prius has a DC of 0.25

 

Taken from Wikipedia:

Acura NSX 90's Drag Coefficient - 0.32
Honda Civic Sedan Drag Coefficient - 0.31
Acura NSX 02+'s Drag Coefficient - 0.30
Toyota Prius Drag Coefficient - 0.29
Honda Civic Hybrid Drag Coefficient - 0.27

Pretty impressive numbers considering it's got less drag than both the Prius AND a 'supercar'.

Edit: Nevermind. The 2010 Prius has a DC of 0.25

Actually...it's astounding how high drag coefficients on supercars have. They are notorious for being very bad with drag numbers. It's because a lot of aerodynamic stabalizers are used on supercars to help with negative lift...and when you talk aero, it's always a trade off between more downforce or less drag.

be sure to take it off when you run the 1/4, then put it back on and see if there's a difference

^^ this is a great idea. OP you should really do some tests and post it up so we can see some data. Have you thought about running a completly smooth under carriage as well?

 

pretty cool, too bad its only for the sedans :sadface:

 

the front portion of it (engine/trans) will fit with 2 new holes.

 

:think: i like that idea

 

looks good. and not too expensive i might look into this

 

Completely awesome idea. Imaginary rep for you. :thumb:

 

:1:..

 

:yeahthat:
:yeahthat:

 

what did this run you

 

about 60 for the 2 long sections and 80 for the engine cover, plus clips and bolts

 

getting better gas mileage?

 

i feel i am, i do a good amount of freeway driving too.

 

I have an Si AND a hybrid and I didn't know that Hybrids had this!

 

be sure to take it off when you run the 1/4, then put it back on and see if there's a difference

 

ill be sure to do that next time im up there.

 

This is a GREAT idea.

But...

in order for it to be worthwhile, we would need to know, on average, how much higher MPG this yields. at $140+, it would need to add some significant gains in HP to make it worthwhile.

I agree that you should take it off and log 5-10 fill up MPG's and then put it back on and do the same. Then, figure the average increase in MPG by using it. We could use that number along with our local gas prices to put an exact dollar-savings number to each fill up with these parts in place!

 

been wanting to do something like this for a while
where can i buy this? :wigglesmiley:

 

Do you have the part numbers man?

I'll do this prob within the next month.

 

I wish they made the whole kit for a coupe then i would do it. This is very ingenious of you op! If you look at the undersides of a Ferrari,Pagani,bugatti or any other race type street machine they run full covered bellies. This i would think help with 1/4mile times,topspeed times and better gas mileage via eliminating airdrag. Some aftermarket company should come out with something that fits both platforms i would be all over it.

 

That's awesome, I wonder if it'd fit coupes? =O Pretty ingenious, surprised nobody tried it before.

in order for it to be worthwhile, we would need to know, on average, how much higher MPG this yields. at $140+, it would need to add some significant gains in HP to make it worthwhile.

Well it's only helping with making the airflow underneath less turbulent. Less drag = goodness all around.

 

Less drag = goodness all around.

Yes, but how MUCH goodness? What are you after, better MPG? Better performance? Both?

Without knowing HOW MUCH better MPG or performance something like this actually yields, it's impossible to determine if it's really worth it.

I can't believe everyone is blindly saying they're just going to do it without knowing what it *actually* does...

I'm not saying it's a bad idea... I'm just saying that from an economical perspective it may not actually be worth it. Until we have some data, we don't really know.

Don't you think Honda would have considered this on the Si if it *really* made that much difference? And Honda isn't paying ~$150 for these parts... I would think that if it provided a lot of benefit on the Si that it would have come on there stock. Honda could have claimed better MPG and better aerodynamics.

p.s. I think they make a similar part for the rear of the coupe. Is the rear of the coupe covered up underneath?

 

the front does but the back does not from what the op has put

 

I think the underbody parts are a good idea for the hybrids, but those parts will also prevent some heat from escaping under the car. Heat soak is going to be worse, especially if you're stuck in traffic.

These parts could even actually generate a little lift at higher speeds.

 

How would it produce heat soak if the cat/b-pipe area is entirely uncovered? The portion below the engine bay is already covered, it's covering mainly the sides.

And what property of physics causes this to generate lift at higher speeds? It's actually the exact opposite, the faster you go the more you benefit from this.

 

i edited the 1st post to show the hybrid bolts needed to secure rear panels.

 

I think at the end of the day you probably are going to only gain a few miles better a tank than without it. I have no proof or results but if you think about it, what its really doing is creating less drag which will help yeild better mpg as your engine will work less to keep the car moving. Its also going to help with trap speed i belive maybe only a 1-2mph better, just my theorey. I think honda didnt do it just like another member mentioned even though it doesnt cost alot on there part it adds up. They put it on the hybrid because it helps them acheive better mpgs so its a benefit moreso with the hybrid to acheive their mpg status.

 

updated on page one, made a cover for the big hole cut out to clear oil pan.

i also been averaging about 1 mpg better than before.