Factory Fives new trunk insert

[michael everson]

For those of you that haven't seen it, here is the new trunk insert.

This is the assembled unit. It comes in 3 pieces and needs to be bolted together.



And here it is mounted in my car.



Very nice piece that went in without much trouble. The only downside I see to it, is that they have you bolt the front edge to the engine cover. You will need to remove the bolts in order to service the engine.

Mike

[Ethan818]

What modifications (if any) would be required to bolt it to the rear shock brace as Jim has suggested? So that the rear engine hatch can be opened without removing bolts?

[michael everson]

It can be done, but its quite a distance away. Just guessing, about 3-5 inches. Not really even close to that area.
Mike

[RM1SepEx]

Craig's brace could be used to hold the front edge up, it runs under that area...

[michael everson]

Just measured. its 5 inches away.
Mike

[Quiny]

Is the trunk for sale yet? I didn't see it on the site.

[michael everson]

Yes. I have one in my possession.
Mike

[matteo92065]

I ordered one today.

[flynntuna]

I have a couple of questions.
How much space is there between the transmission and the bottom of the trunk?
And in your opinion will it seriously affect air flow around the engine?

[michael everson]

About 1.5 inches. I know this because I propped it up with a 2X4. I think it will seriously affect air flow. Pretty much the air needs to go down and come out under the trunk through the lower vent.
Mike

[wleehendrick]

About 1.5 inches. I know this because I propped it up with a 2X4. I think it will seriously affect air flow. Pretty much the air needs to go down and come out under the trunk through the lower vent.
Mike

So if you put your groceries in the trunk, they'll be cooked by the time you get home!

[freds]

About 1.5 inches. I know this because I propped it up with a 2X4. I think it will seriously affect air flow. Pretty much the air needs to go down and come out under the trunk through the lower vent.
Mike

I have serious concerns about this too, especially if you have a stock air to air intercooler. Voiced my concern in the Body & Interior thread ....copy below

04-10-2015, 04:09 PM #6
freds freds is online now
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[QUOTE=Jim Schenck;194754]Bill,
With the trunk in place the main rear duct under the license plate is still open and that is where most of the airflow will go, especially with the rear spoiler on the car. We are also looking into other ways to vent the rear taillight panel for cars that need extra flow through the intercooler.

Observation: After driving my 818S with 2006 stock intercooler the grill in the rear deck lid is "very hot". The back grill behind the gearbox is not even "warm".

This leads me to believe that most of the intercooler air is exiting through the rear deck opening. And that the area above the rear deck is a lower pressure area than the rear grill under the license plate.....good for the IC efficiency No?

Anyone have any similar observations (or facts)?


Any detailed info would be welcome.

fred

[michael everson]

I am no expert, but with the car fully assembled how much air actually gets in the engine compartment anyways? The only access I see is through four small scoops in the body. The bottom of the car is pretty much closed off.
Mike

[tmoretta]

That is true if you install the optional rear diffuser, otherwise no.

[RM1SepEx]

Open up the side scoops and trash the perforated metal grills and the 3/4 wide "trim" Add side scoops (Craig, CF scoops needed add a fan to create a low pressure area) Replace the rear grill material with something that has a larger open area and the airflow under the trunk should increase dramatically. I'm also going to install a heat shield over my muffler and I'm planning my own trunk...

[FFRSpec72]

I am no expert, but with the car fully assembled how much air actually gets in the engine compartment anyways? The only access I see is through four small scoops in the body. The bottom of the car is pretty much closed off.
Mike

The under belly (under engine panel if running the rear diffuser) is a great place for NACA ducts, much like what VRaptor has done for the GTM (see http://vraptorspeedworks.com/naca-duct-belly-pan-small-trapezoid/ ), this would be just a insert panel. Along with the side louvers that VRaptor has for the 818 you will get plenty of air in, now the issue is to get it out, the area where the license plate goes (between the tail lights) becomes a primary source for exiting air.

[RM1SepEx]

Tony, that area between the tail lights will be the trunk... so no airflow

[FFRSpec72]

Tony, that area between the tail lights will be the trunk... so no airflow

Very bad, blocking any airflow that might have been possible

[matteo92065]

The area between the trunk and rear panel actually seems like it would be fairly large actually. 2 to 3 inches? and ~8"? high? a cross section of 16-24 sqin? That is about the same as a tube between 4 and 6" diameter duct.
Looking at it closer; it looks to be tapered all the way to the bottom of the trunk. The distance between tail light body and trunk body increases the lower it goes.

I'll get to see if my license plate vent frame works.

[Slatt]

Mike, what's the max weight you would be comfortable with putting in that trunk?

[michael everson]

They way mine is installed, maybe 30-40 pounds evenly distributed. Any more that that and I would add a fixed mount on the bottom surface to the frame somehow.
Mike

[tmoretta]

Remember also, that the perforated grill material that FFR supplies flows very little air. I ordered replacement material from customcargrills.com that flows 77 % and comes powder coated gloss black.

[cmcintyre]

Rori's shifter arm for the K and N mounts up instead of down. Does it look like it would clear the trunk? Thks.