924Board.org

[cleethorpes]

I know I have seen this done before.

Has anyone here done it, and are the weight savings / easier access to fuel tank worth the effort?
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'24 turbo with dodgy gt bodykit......needs a new home

[Robert Hooper]

I am planning to do this,

my car is currently stripped bare, and i am reving all under body seal and everything not needed to make the car go,

I am goinf to cut out the rear fllo and replace it with fiber glass cover

I will cut mine out within the next few weeks i will weigh it for you,

Cheers

Rob
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1982 924 Race Car
1981 931 Road Car

[cleethorpes]

cheers Rob
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'24 turbo with dodgy gt bodykit......needs a new home

[Paul]

WHY?

At most you'll save 15 pounds (A wild a$$ guess) and may very well compromise the strength of the unibody.
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White 87 924S "Ghost"
Silver 98 986 3.6l 320 HP "Frank N Stein"
White 01 986 "Christine"
Polar Silver 02 996TT. "Turbo"
Owned and repaired 924s since 1977
Porsche: It's not driving, it's therapy.

[emoore924]

Agreed. Probably not a good idea. I'd look elsewhere for weight savings. You might lose a little weight but there's a lot of structure you'd lose by putting in a sheet of aluminum. All those factory dimples, crinkles and bends are there for a reason -- to give that flat sheetmetal strength and stiffen the rear. Take that out and all kinds of things can begin to move around.

The only time I've seen the rear floor removed was in a full tube-frame 924 racer. And there they had trussed things with a pretty incredible spiderweb of tubing to stiffen things up and keep the rear suspension where it was supposed to be.

[speedsta2003]

I also would not recommend removing the flooring. However removal of all the sound deadening material is okay. Sometimes this requires a heat gun to remove, but sound deadening is where a lot of the weight in the floor is.
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My Old Porsche Thats Sold
http://members.cardomain.com/jatbballboy15

[81turbo]

I actually just cut the floor out of my parts car, I can weigh it for you, It was a real bitch to get out even after I already cut off the entire rear six inches of the car, fender to fender. If you plan on doing this and want to keep your car (WTF?!?!?!?!?!?!) I would recommend using a plasma cutter to ensure a quality cut. With the Reciprocating saw it was a difficult task.

I bet the heaviest part of the whole thing isn't the metal, but all of that rubbery stuff on either side.

I also wouldn't recommend doing this with the trans, fuel tank, fuel lines, or pumps in place. I cut through a few fuel lines (who cares it's a parts car) and everything was gone except the torque tube and the lines. It sounds like way more work than it is worth, Plus you are then messing with he structural rigidity of the car.

[simsport]

The DP race 924's cut the floor out.
It fits between two beams and the chasiss rails at the sides. All in all I doubt it adds anything much to structure. Although to be fair the race cars all have cages, perhaps that hides issues with the rear of the car.
Still cant see a major problem there though.

My car has the spare wheel area cut away. I kept the floor as I hang my alloy fuel tank from it.

Cheers
Simon
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Blown is always best!

[john h]

[My924gtc]

I have seen it done before but it usually involves a fuel cell install and a cage to retain chassis strength. Both a roll cage and a cage around the fuel cell were used in the cases that I heve seen.

Here's nice FC install in a 944, not ideal IMHO but a decent job...http://www.jrmock.com/fuel_cell_install_1.htm
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MJ
'81 924 2.0L T
'82 924 2.3L SC/EFI <---online fall '06

Sponsor of the 944 Cup and Super Cup
Sponsor of the "2006 Battle in the Badlands"

[81turbo]

Well, I didn't weight the floor panel, But I can tell you that it is really light! After holding it up I would never waste my time cutting it out, Just scrape off all of the rubberized stuff I am positive that weighs more than the metal.