Two Questions for the veteran teeners, For those who've been there, done it wrong, and then did it again Options

[c12croft]

Easy for you 914 mavens.
For the street driver only, no competition track (means pretty but aggressive)

1. Fire Extinguishers--------which type is best? ie; halon, best mount, ie; floor, seat rails etc. OR in engine compartment automatic sys?



2. Battery quick disconnect ---------prevent storage drain. assuming battery is in original location on tray, which is best? "Key type" or terminal quick unscrew style (at batt terminal) AND best location for key switch (in cab dash? or on engine lid?) Bosch, or Rennline (with red key?)



THANK YOU

[ArtechnikA]

a) you want something in the cabin with you unless your race regs require otherwise, which you've said they don't.

b) get something with an alternator cutoff circuit, unless you are going for a specific vintage look for concours purposes. If you are, find a way to incorporate an alternator cutoff circuit...

I am fitting a period-correct 1-pole switch to my RSR homage - but there will be an alternator cutoff circuit wired in behind the scenes.

You must ask yourself 'why'. If it's just for the look. put it where you want and don't wire it in. For street cars, the ignition switch is fine.

[c12croft]

a) you want something in the cabin with you unless your race regs require otherwise, which you've said they don't.

b) get something with an alternator cutoff circuit, unless you are going for a specific vintage look for concours purposes. If you are, find a way to incorporate an alternator cutoff circuit...

I am fitting a period-correct 1-pole switch to my RSR homage - but there will be an alternator cutoff circuit wired in behind the scenes.

You must ask yourself 'why'. If it's just for the look. put it where you want and don't wire it in. For street cars, the ignition switch is fine.

Thank you Art!
Quick follow-up please:
1. Is it possible to mount the extinguisher in cabin without mounting to the seat rails OR if mounted on floor will it interfere with the operation of the seat adjustment? What do you guys do?
2. What is best fit size-wise, 1lb or 2.5lb?

Batts
3. Where do install batt cut-off in concours level?
4. How and why do you install alternator cutoff?
5. Which product is best?

thanks

eeeeee

[ArtechnikA]

1. Is it possible to mount the extinguisher in cabin without mounting to the seat rails OR if mounted on floor will it interfere with the operation of the seat adjustment?

Kind of a trick question, because I've only had pre-'73's.
Donno why you would not want to mount it to the seat rails - they're one of the stronger structural elements in the cabin. I think there is room to mount on the tunnel, for the right size bottle.

2. What is best fit size-wise, 1lb or 2.5lb?

this gets back to 'why' ? Smaller fits better, of course. but a pound of Halon isn't going to put out anything if the wind's blowing. The standard for AX/DE used to be 2:A/10:BC. IMO avoid dry-chemical because the aftermath of deployment may be worse than the fire you're trying to put out (it's really corrosive.) Halon (or whatever they're using now that halogenated hydrocarbons have been deemed environmentally unfriendly) doesn't have this issue, but it does require a certain percentage my volume of the air, which is hard to achieve outside.

Look at places the pro racers shop, like PegasusRacingEquipment.com

3. Where do install batt cut-off in concours level?

the two standard period-correct places for 914 are the cowl, forward of the driver, and the stationary vent panel by the engine cover. You must be careful in a street-driver car, because if someone besides you takes the key - you are screwed... Or you can mount it inside, in which case - why? the ignition key works fine... There are a few unfused circuits but not worth losing sleep over. If you just like the look - mount what you like and don't wire it in. For a stock-location battery, something near the battery will work best.

4. How and why do you install alternator cutoff?

Why is easy - cutting the load on an operating alternator will kill it quicker than sooner. Basically you need to provide a resistive path to ground for the plus side. This is accomplished by a separate set of terminals on the kill switch. A wiring diagram will come with the switch. If it has only two big terminals - it doesn't have one... The lovely period-correct Bosch switch - doesn't have one.

5. Which product is best?

I'm doing the lovely period-correct Bosch - but with a behind-the scenes relay for the alternator protection. The removable red-switch Hella is also pretty close to period-correct. But since nothing with the possible exception of a real GT came with one, nothing will be truly correct, so do what you like.