[masraum]

Originally Posted by Zeke

Agree here and with Higgens. I think there are ways to lighten a 911 significantly w/o making Swiss cheese. The 914 rear lids with balsa ribbing come to mind and that was then. The rocker panels on a 911 may or may not be overengineered. There isn't a lot of change to the Targa body with the exception of some additional pieces near the footwell. And there's that heated tube ass'y and all the connections.

The front hood was fiberglass that they lined with balsa wood.

IDK if the car here had CF rotors and that sort of thing but light wheels and tires could probably save quite a bit.

Those were custom made wheels. They were steel centers with custom aluminum rims. The steel wheels were milled for thickness, and the holes in them were ground to be twice as large as they had been originally. And they used lightweight dunlop racing tires. I think he said the whole thing was 4.3kg

The front and rear bulkheads along with the package tray could very well be bonded AL of CF. That could be true with the tunnel as well. If the tunnel is a torsional component, it should be one piece CF.

It is obvious to state that the roof and all bolt on body parts be CF, even the welded rear quarters including the entire rear glass area. The rear lid would not touch metal anywhere including the entire rear latch panel. All composite. The front equivalent as well. That's a lot of work.

I'm pretty sure that all of the bolt on body work was thin, lightweight fiberglass. I think the rest of the body was steel. The car when he bought it had been converted to look like an SC, so they did patch back in the original steel rear fenders for the original style fender lip.
He did discuss that a lot of the lightning was with a mind to maintaining structural rigidity where it was needed, but that they kept in mind that a much lighter weight car shouldn't need the same sort of rigidity as one weighing twice as much.

They built it and the whole thing weighs 627kg, but he's going to put in on a diet to try to get it down to 595kg.