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1999 Subaru WRX spark

Tiny
MRPISH
  • MEMBER
  • 1999 SUBARU WRX
A spark plug is fired at 18° bTDC in an engine running at 1800RPM. It takes 8° of engine rotation to start combustion and get into flame propagation mode. Flame termination occurs at 12° aTDC. Bore diameter is 8.4 cm and the spark plug is offset 8mm from the centerline of the cylinder. The flame front can be approximated as a sphere moving out from the spark plug.
1. Calculate the effective flame front speed duringj flame propagation.
2. Rotational angle durning flame propagation is from 10° bTDC to 12° aTDC which equals 22°.
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Tuesday, February 17th, 2015 AT 6:20 PM

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Tiny
CJ MEDEVAC
  • MECHANIC
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SO LIKE WHAT ARE WE TRYING TO DO?

THE MEDIC
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Tuesday, February 17th, 2015 AT 7:33 PM
Tiny
CJ MEDEVAC
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. AND THE PLUG IS "TOLD" TO FIRE AT 18 DEGREES

THE ACTUAL SPARK AT THE ELECTRODE HAPPENS, JUST ATDC

THE MEDIC
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Tuesday, February 17th, 2015 AT 7:37 PM

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