Under tray

BTW, which way is the right directions for the louvers? Forward so the scoop the wind or backwards so they let the air out of the front compartment?

 

The correct direction is the one it comes with, always trust what I say. Now with that settled, what's everyone's thought on the best oil to use? I've read mineral oil is the best to use in all Italian cars

 

Backwards just like on post#3

 

The original part did not have louveres.

 

That's what I figured. These probably came off to help cooling.

 

Doubt it. They would only work while moving, and if the car is moving that much, normal airflow has it covered.

More likely - they are there for the "wow" effect, to catch the eye of someone that says "I gotta have that".

 

I meant to say people took the original solid plates off to help cooling. The way the front of our cars is set up there is little place for the air to go one past the radiator fans. removing the plate on the bottom probably helps that.

 

Well, I just installed the Superformance version on my '77 GTB. Had to drill two new holes to convert from RHD to LHD (one mount hole and the hole for the drain hose). Subjectively, it does seem to help the car run cooler, even in traffic. I will report back after the temperature here breaks 70F, LOL.

 

The panel was missing when I bought my 85 QV, so I made a flat one out of 2.5mm aluminum sheet and fitted it. Works fine, but I do wish I had louvered it. I am sure any hot air will need to escape beneath the car as it would be from the front radiator. Scooping in any air will not help anything. I then remembered that my son's Porsche 944 has a aluminum panel under the engine with louvers to scavange air out of the engine compartment.

 

Sorry to be late to the dance, but today was the first opportunity for me to take a snap.

As you can see, cheap and easy.

Enjoy -DM
Image Unavailable, Please Login

 

I think I am going with that design. Local metal supply sells perforated aluminum sheet and will even cut it to my dimensions. I will just need to drill holes.

 

OK so it looks like I did the same thing as dave80gtsi. $15 perforated stainless sheet from Industrial Metal Supply +$15 to cut it to 23.5" x 12". Drilled six holes and I'm done.
Image Unavailable, Please Login

 

Roughly 3 months since you introduced the extra venting, how do you feel it's been doing?

Sent from my SM-G930P using Tapatalk

 

Now in production, argued that it fixes all cabin heat related issues, makes air conditioning 10 degrees cooler, replaces air conditioning when not present, extends battery life, increases HP rating by 2. $175 and shipping is always included
Image Unavailable, Please Login

 

Thanks! Got a good chuckle out of that this morning!

 

I got one and it's all true. 😉


Sent from my iPhone using Tapatalk

 

Is it true that installing two, one below the other, with the vents facing in posit direction will actually cause the car to handle better? Or is it just that the vortex causes a slight suction under the front end?

 

What your talking about is reversion technology, yes I have one on my personal 308, there's a reason why mine is the bestest 308 ever

 

Didn't realize this was the 308 sarcasm thread...

Sent from my SM-G930P using Tapatalk

 

For the record, I think post #1 confuses the inspection plate with the undertray. The part shown in post #1 is not the same as the part shown in post #3.

If needed, I have detailed drawings/dimensions of the undertray.

 

That looks pretty sweet. Maybe include a second a/c condensate tube hole so it will work for RHD cars also.

 

Here's a drawing using the dimensions from the panel on my 83 308.
View attachment 308_undertray.pdf

 

Too darn hot to drive here much. I drive it over to the c&c once a month. No change in temps and it's about 100 degrees out with the air conditioning "working." Temp is just fine. Remember I am going from no plate to a perferated plate.

 

Duly noted. Let the record reflect the correct terminology.

 

Duly noted. Let the record reflect the correct terminology.