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Electric fuel pump shut offs

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keithwyss's picture
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Fort Wayne, IN
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May 20, 2017
Electric fuel pump shut offs

How many sanctioning bodies have rules that require the electric fuel pump to be shut off in case the race vehicle no longer has oil pressure- no matter the reason?  It appears that several larger fires recently were fed by fuel provided by an electric fuel pump after engines had stopped/oil pressure ceased.

Battery disconnect switches are ok- and not always effective. It is my opinion that oil pressure based control and redundant power cutoffs, combined with proper rule enforcement/inspections will reduce the fire hazard for both participants and safety personnel. 

What is your experience and opinions on this subject?

Keith Wyss, Ambassador

hcisneros's picture
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May 22, 2017

Is your oil pressure comment based on implying that the engine is off so there would be no signs of oil pressure?

keithwyss's picture
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May 22, 2017

My comment is based on the knowledge that oil pressure based electrical connection to electric fuel pumps causes the fuel pump power to be interrupted when oil pressure ceases.  The cause of the loss of oil pressure can be simply shutting off the engine, breaking a mechanical component, or abrupt stoppage as in a spin or a crash. Simply stated, if you have no oil pressure- your immediate need for fuel has ceased.

Another way of looking at it...if you have no oil pressure, cutting off power to the fuel pumps is helpful mechanically AND from the safety perspective.

Thank you for asking!  Did I adequately answer your question? 

Keith Wyss, Ambassador

hcisneros's picture
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June 6, 2017

Yes thank you.  Any insight that you can provide on what the OEM built race cars such as GT3 spec come with?  What is the FIA ruling on this?

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