1970 s2 0453R Reassembly

[BDA]

Great progress, Dakazman!

It seems the usual material used for new firewalls is marine grade plywood covered in fiberglass. I'm not aware of anybody making a removable firewall but some people make a door for access to the front of the engine.

[4129R]

Great progress, Dakazman!

It seems the usual material used for new firewalls is marine grade plywood covered in fiberglass. I'm not aware of anybody making a removable firewall but some people make a door for access to the front of the engine.

I used 12mm ply, covered with fibreglass when replacing the soaked thick cardboard originally used.

Richard at Banks said he just glass fibre covers any bad original firewall. That is what I plan to do to 4129R this weekend.

As it is a "firewall", any removable panel should not compromise the passage of flame/smoke. Difficult to seal the perimeter of the removable bit. 

[Bodzer]

Well done again!

How about Aerogel insulation sheets? My only concern is that Aerogel itself is hygroscopic but I think when it’s impregnated into sheets it isn’t much of a problem. Different types sheeting are available depending on the level of thermal performance required.

[Runningwild]

I sandwiched the original firewall with .030 aluminum then aluminum honeycomb heat shield. 

[BDA]

I sandwiched the original firewall with .030 aluminum then aluminum honeycomb heat shield.

Now that is a FIREwall!

[Certified Lotus]

I sandwiched the original firewall with .030 aluminum then aluminum honeycomb heat shield.

Not exactly “adding lightness” 

[dakazman]

I sandwiched the original firewall with .030 aluminum then aluminum honeycomb heat shield.

That is a masterpiece 😀👍

That’s where I was leaning, aluminum and aircraft mechanics get along nicely. I only have a beef with getting to the fuel tank/ tanks. When I purchased the car the fuel tank was cut out of the bottom of the car. I am not going thru that repair again so that’s why I will split your design into 3 pieces.
Aluminum t- channel uprights and glass angle  around perimeter.

PS taking the day off . 😄 Became a Grandfather for the forth time last night
To a baby girl , Madison.

Dakazman

[BDA]

Congratulations on your granddaughter, dakazman!

[lotusfanatic]

Dakazman,

Congratulations to you and your family!

Mark

[dakazman]

Thank you 
Baby and first time mommy healthy and doing fine😀.
Dakazman

[Runningwild]

The alum and the heat shield only added around 5 pounds. Very light weight stuff   

[dakazman]

I like the look and layout of he heat shield material. Is the aluminum sheet on the engine side or under the heat shield? I’m assuming it’s on the engine side , hence the word sandwich.

The original “firewall” straw type sound board for material left much to be desired at least in my
Vechicle. Your addition is the closest to a true firewall.

Dakazman

[Certified Lotus]

A fiberglass car will burn so quickly it doesn’t really matter what you add to the “firewall”. If you detect a fire in your car, get out! And fast.

How do I know? I’ve seen two Lotus Exige’s burn at the track. Even a complete fire suppression system in one didn’t stop it from burning.

All I’m adding to my “firewall” is a sheet of heat insulation on the engine side as I took out the old horse hair mat. It will be lighter.

Congrats on being a grandfather (again)!

[dakazman]

Thanks certified,

I held back on stating that. Its not that I believe it is a firewall but just a barrier for
Carbon monoxide, dirt , dust, water , fire , sound.   
Dakazman

[dakazman]

After reading a pfd  by Dave on firewall I have a new approach.
See pic 1 , view from engine compartment. Glass flanges going on.

   Secondly, final black going on see bonnet.  Bring up the level of engine compartment and front luggage compartment and spare tire area.
Dakazman