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Author Single coil or wasted spark?
Jakey
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Registered: 4th Jun 07
Location: Sandbach
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5th Apr 11 at 22:14   View Garage View User's Profile U2U Member Reply With Quote
My mate with the XE mini clubman on carbs has ordered a shift light for it. The bloke selling it has asked whether it is single coil or wasted spark. Im baffled, any ideas?
sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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5th Apr 11 at 22:16   View User's Profile U2U Member Reply With Quote
Single coil I would imagine.
Jakey
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Registered: 4th Jun 07
Location: Sandbach
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5th Apr 11 at 22:17   View Garage View User's Profile U2U Member Reply With Quote
I thought that as it uses a single coil, but i don't want to rule out wasted spark until im clear what it is.
sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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5th Apr 11 at 22:17   View User's Profile U2U Member Reply With Quote
Is it a dizzy or coilpack xe?
sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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5th Apr 11 at 22:19   View User's Profile U2U Member Reply With Quote
wasted spark is when 2 plugs fire but only 1 is on the compression stroke, so one sparks when exhaust gas is expelled, harmless but keeps electrical shit more simple.
Jakey
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Registered: 4th Jun 07
Location: Sandbach
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5th Apr 11 at 22:20   View Garage View User's Profile U2U Member Reply With Quote
Dizzy.
sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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5th Apr 11 at 22:22   View User's Profile U2U Member Reply With Quote
Aye will be 1 plug fireing at a time then.
sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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5th Apr 11 at 22:24   View User's Profile U2U Member Reply With Quote
Actually how many coils does it have?
sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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5th Apr 11 at 22:26   View User's Profile U2U Member Reply With Quote
dizzys can have wasted spark too.
sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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5th Apr 11 at 22:27   View User's Profile U2U Member Reply With Quote
Again
some wasted spark ignitions have 1 coil (to the eye) but the internals are seperate....its all coming back
Jakey
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Registered: 4th Jun 07
Location: Sandbach
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5th Apr 11 at 22:29   View Garage View User's Profile U2U Member Reply With Quote
Erm. It's a dizzy cap run c20xe on twin 45s?
sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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5th Apr 11 at 22:36   View User's Profile U2U Member Reply With Quote
Suppose the only way of really knowing is taking the plugs out and see if 2 spark at the same time.
LeeM
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Registered: 26th Sep 05
Location: Liverpool
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6th Apr 11 at 00:33   View User's Profile U2U Member Reply With Quote
does the xe have a cam and crank sensor? if its got both it'll be single coil. wasted spark eliminates the need for a cam sensor
stubs
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Registered: 30th Jun 02
Location: Bolton
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6th Apr 11 at 06:48   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by LeeM
does the xe have a cam and crank sensor? if its got both it'll be single coil. wasted spark eliminates the need for a cam sensor


Why aren't cars more simple like this any more?
Steve
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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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6th Apr 11 at 06:57   View Garage View User's Profile U2U Member Reply With Quote
wonder if wasted spark is more prone to popping or backfiring
LeeM
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Registered: 26th Sep 05
Location: Liverpool
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6th Apr 11 at 07:11   View User's Profile U2U Member Reply With Quote
exhaust gas will have been mostly expelled and the valve be nearly closed by the time you get the spark on that cylinder, so unless is running super rich i doubt it, although i suppose theres the chance
Mattb
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Registered: 2nd Feb 03
Location: Under your sisters bed
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6th Apr 11 at 13:10   View User's Profile U2U Member Reply With Quote
Seriously some of the replies are rediculous....

Wasted Spark = Normally a single coilpack which is internally split in two firing cyls 1+4 then 2+3 at the same time - This is what is fitted to Dizzyless C20XE's

Single coil - One coilpack per cylinder - as fitted with most modern engines these days. They fire independantly of each other..


As regards the original post - let the guy know its running a dizzy
sand-eel
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Registered: 15th Mar 07
Location: carluke/braidwood--IRNBRULAND
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6th Apr 11 at 17:26   View User's Profile U2U Member Reply With Quote
Single coil doesn't have to be a coilpack per cylinder, ie my old nova had a single coil with dizzy but isn't wasted spark as the dizzy arm only hits 1 "electode" at a time.
Mattb
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Registered: 2nd Feb 03
Location: Under your sisters bed
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6th Apr 11 at 17:57   View User's Profile U2U Member Reply With Quote
Yes distributer ignition system does use a single large ignition coil, however i have never ever heard it refered to as single coil ignition

its like refering to a Single carb set up as single point injection...
3CorsaMeal
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Registered: 11th Apr 02
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6th Apr 11 at 18:00   View User's Profile U2U Member Reply With Quote
spark plugs make sparks
Mattb
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Registered: 2nd Feb 03
Location: Under your sisters bed
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6th Apr 11 at 18:02   View User's Profile U2U Member Reply With Quote
quote:
Originally posted by 3CorsaMeal
spark plugs make sparks


Yes... yes they do......



Would you like a crayon??
Steve
Premium Member

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Registered: 30th Mar 02
Location: Worcestershire Drives: Defender
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6th Apr 11 at 18:03   View Garage View User's Profile U2U Member Reply With Quote
nah

 
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