30
The new curved bracket is secured to the roll bar with hose clamps. These are big and sturdy, and are not likely to go anywhere. The handle is ready for actuating the extinguisher, should it be needed (let’s hope not!).

 

We also didn’t quite like the way the fire bottle was mounted. Turning the bottle around with the handle inboard means that a hard side hit won’t inadvertently engage the fire system. We also improved the sturdiness of the mounts.

 

Here’s a close up of the extinguisher handle. You can see both of the attachment points for the two pull handles and the arming pin. You can also see the push-on connection that most fire systems use.

 

Really, Tom!?

 

Captive nuts are riveted into place and we utilized some factory holes where they were available.
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Comments
spdracerut
spdracerutlink
Wednesday, January 31, 2018 9:11 AM
Interesting about the 3M Novec fluid. They have different formulations within that product line and some of the fluids are used for direct cooling of electronics as it's a dielectric fluid. Good call on having a nozzle by the turbo; I remember a long time ago, a time attack car burned down because the fire was in the turbo area and they unfortunately had nozzles on either side of it, but not in the turbo area itself.
Crousti
Croustilink
Thursday, February 01, 2018 10:25 AM
The often overlooked problem with the foam extinguishing is that users really need to clean everything. The engine was on while the extinguisher was used ? Well ... now you can disassemble your engine and intake system entirely to clean it. And i mean it; the last time i saw it happen, the guys found foam everywhere (intercooler of course, but also turbo compressor and turbine, head, valvetrain, oil pan, combustion chamber ... the stuff goes everywhere).

And you want to remove the engine to clean the bay anyway because, again, it goes everywhere.
thoraxe
thoraxelink
Thursday, February 01, 2018 12:46 PM
That's a great point, @crousti.

I had actually had a fire in my 240SX way back when. Even a minor engine bay fire did quite a lot of damage. The track workers used chemical extinguishers which are actually quite corrosive.

Not only did we do a full engine-out, but we also replaced all of the brake hard lines just in case. We probably should have replaced the brake and clutch master as well, but they seemed to hold up. If I had to do it again, I'd replace them both.

Also one thing to think about -- if you are going to pull your extinguisher, TURN OFF THE CAR!
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