Ferrari Mailing List: Re: Carbs, fire and costs

[LarryT (L02turner]

Doug,
IMO, most of the engine fires in Porsches happened in 911's converted to 
carbs.   the needle valve would stick and cause the bowl to overflow and 
then it was just a matter of time before a spark set things ablaze.   
Even though FI systems operate at higher pressures, they didn't have 
such a leak source that would douse the engine with fuel.  Once the 
systems had non leaking connections they tend to remain non leaking.

Matt's comments about the fuel lines becoming brittle - again, IMO as 
long as they weren't moved they would not start leaking.   They often 
crumbled when removing them to replace.

LarryT

On 10/3/2014 10:42 AM, Doug & Terri wrote:
> Matt asks ". . . but I do concur that over time it is likely that this hard
> plastic in a hot engine bay might become brittle. Are there documented
> episodes of these failing?"
>
> No.  Not to my knowledge.  Porsche started using the CIS injection system in
> mid-1973 and used it thru 1983.  In that time period they put hundreds of
> thousands of CIS cars on the road.  Tho there were other problems (engine
> melt downs in the mid-70's as a result of early emission controls: the
> Thermo Reactor log for one) I cannot recall ever having seen or heard of an
> engine fire as a result of brittle fuel lines.
>
> Not so to be too fast now - I did mention the 914 fuel line which at least
> looks the same - causing engine fires.  But that was a result of battery
> acid contamination as the fuel line ran under the battery tray and was
> easily contaminated, sprung leaks, and burned the car to the ground.  Alas.
>
> Onward
> DOUG
>
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