Engine Fire
11-03-2011, 05:39 PM
#17
Rennlist Member
I rather feel a better way to measure fuel pressure may be to fit a sender unit somewhere on the pump discharge. It will read a slightly higher pressure than the rail becuase of transmission losses in hte plumbing but it would be accurate enough I suspect. The the signal could then be data logged or put on an analogue display in the cabin. The mount could also be made very robust. Less likely that a leak would flash off in that area.
Pressure gauge connections are infamous for causing fires on oil refineries.
Trouble with leaks in the engine bay is there is a good chance something electrical or a hot surface could flash it off.
Regards
Fred R
11-03-2011, 05:45 PM
#18
Rennlist Member
I rather feel a better way to measure fuel pressure may be to fit a sender unit somewhere on the pump discharge. It will read a slightly higher pressure than the rail because of transmission losses in the plumbing but it would be accurate enough I suspect. The signal could then be data logged or put on an analogue display in the cabin. The mount could also be made very robust. Less likely that a leak would flash off in that area.
Pressure gauge connections are infamous for causing fires on oil refineries and we use taper threads to boot.
Trouble with leaks in the engine bay is there is a good chance a hot surface or electrical spark could flash it off.
Regards
Fred R
11-03-2011, 06:23 PM
#21
Team Owner
Randy sorry to see your ride catch fire,
this makes me think that it might be a better idea to have the fuel pressure sender removed and the outlet capped unless the sytem is being tested.l
As Greg already posted the reanson for the spark was a leaking ignition wire open the hood run the car after capping the sender outlet and you should be able to find the sparking wire
this makes me think that it might be a better idea to have the fuel pressure sender removed and the outlet capped unless the sytem is being tested.l
As Greg already posted the reanson for the spark was a leaking ignition wire open the hood run the car after capping the sender outlet and you should be able to find the sparking wire
11-03-2011, 06:28 PM
#22
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First, happy that YOU are ok.
Second, good that you car as only minor damage.
Third, now I'm sure I won't put a gauge on my car...
Bring her back to life soon!
Second, good that you car as only minor damage.
Third, now I'm sure I won't put a gauge on my car...
Bring her back to life soon!
Last edited by Bertrand Daoust; 11-03-2011 at 09:56 PM.
11-03-2011, 07:10 PM
#23
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There is a whole bunch of arcing going inside the vented distributor, and there is nothing you can do about that except either go to a COP design or pressurize the distributors like Jag did on the V12's to keep fuel vapor out.
I have had 2 V12 Jags catch on fire in my shop due to leaking lines an the distributor being deep down in the V, and one blew the cap into little pieces.
So the best defense is to not have any fuel vapor or liquid where it should not be.
I have had 2 V12 Jags catch on fire in my shop due to leaking lines an the distributor being deep down in the V, and one blew the cap into little pieces.
So the best defense is to not have any fuel vapor or liquid where it should not be.
11-03-2011, 07:37 PM
#26
Rennlist Member
Oh My - sorry to see this Randy. Hope the fix is quick and clean!
11-03-2011, 07:39 PM
#28
Electron Wrangler
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Alan
11-03-2011, 08:17 PM
#29
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Since it was a small leak, the gas would have evaporated by the time it got to the headers and even then, it needs a lot fo heat to ignite it but one arching wire will spark it up in an instant.
Good save.
11-03-2011, 10:00 PM
#30
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Randy:
That sucks...but it could have been much worse. Nice job!
That sucks...but it could have been much worse. Nice job!
__________________
greg brown
714 879 9072
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Semi-retired, as of Feb 1, 2023.
The days of free technical advice are over.
Free consultations will no longer be available.
Will still be in the shop, isolated and exclusively working on project cars, developmental work and products, engines and transmissions.
Have fun with your 928's people!
greg brown
714 879 9072
GregBBRD@aol.com
Semi-retired, as of Feb 1, 2023.
The days of free technical advice are over.
Free consultations will no longer be available.
Will still be in the shop, isolated and exclusively working on project cars, developmental work and products, engines and transmissions.
Have fun with your 928's people!