DIS Explainations

[Kevin Vannorsdel]

--Boundary=_0.0_=5030200026989816
Content-Type: text/plain; charset=iso-8859-1
Content-Transfer-Encoding: quoted-printable

Sorry to nit pick...  but...  Power =3D I**2  R     not   IR**2

respectfully,

________________________________________________
  Kevin Vannorsdel     IBM Arm Electronics Development
    408-256-6492                Tie 276-6492     kv at us.ibm.com




owner-diy_efi at efi332.eng.ohio-state.edu on 03/23/98 03:32:28 PM
Please respond to diy_efi at efi332.eng.ohio-state.edu
To: diy_efi at efi332.eng.ohio-state.edu
cc:
Subject: RE: DIS Explainations


  Think of the two spark plugs as two resistors in series.  Their resis=
tance
adds, but the wattage of each will be different, the plug with the high=
er
resistance consuming more wattage (ie watts =3D current x resistance sq=
uared).
If one of the plugs doesn't arc, then the circuit is not completed, and=
 the
other plug will also not fire.

Pete Datcuk
Mechanical Engineer
Sewell, NJ
'87 Fiero, soon to be Northstar'ed :-)
'67 Jeep Commando, to be risen from the dead ;-)


-----Original Message-----
From: Michael Baxter
Sent: Sunday, March 22, 1998 2:47 AM
To: Blind.Copy.Receiver at compuserve.com
Subject: Re: DIS Explainations

John Hess <johnhess at cris.com> writes:

>> Actually, you can have a spark in a vacuum!
<<

Air is an insulator. The more air molecules (denser), the better insula=
tor
it makes. A good example, just because they've been discussed on the li=
st
before, is WWII airplanes. Their magnetos were pressurized to keep the
ignition energy under control at high altitudes. Without the
pressurization, the engines would start to misfire at 18,000-20,000 ft.=


High altitude piston engine airplanes today still have pressurized
magnetos.

I can offer no clues as to why the waste spark only consumes 20-30% of
the spark energy in a DIS ignition system that fires two plugs at once.=



 -- Michael Baxter, MBaxter at Compuserve.com
 http://ourworld.compuserve.com/homepages/MBaxter
 From Reno, NV USA on
21-Mar-1998------------------------------------------------------------=
--------------------




=

--Boundary=_0.0_=5030200026989816
Content-Type: application/octet-stream; name=x
Content-Transfer-Encoding: base64
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==

--Boundary=_0.0_=5030200026989816--