Chat for Falco Owners.
Moderators: Aladinsaneuk, MartDude, D-Rider, Moderators
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rick
- SuperSport Racer
- Posts: 512
- Joined: Thu Mar 18, 2010 1:12 pm
- Location: Auckland, NZ
#1
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by rick » Wed Mar 31, 2010 11:39 am
I ordered those DENSO IXU27 plugs from sparkplugs.co.uk and they arrived yesterday and I was going to fit them tonight...
...I remembered when I ordered them I thought "how many cylinders do I have... 2... so that'll be two spark plugs then."...
...oh how wrong I was!
Second order sent, maybe I'll fit them the weekend instead
So why two plugs per cylinder? Surely one spark is enough??!
"There is a grey blur, and a green blur. I try to stay on the grey one..." - Joey Dunlop. Isle of Man TT Champion.
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dyzio
- Clubman Racer
- Posts: 374
- Joined: Sun Dec 07, 2008 1:41 pm
- Location: Aberdeen'ski
#2
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by dyzio » Wed Mar 31, 2010 11:49 am
Why 2? Dunno, possibly emissions(?)
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Falcoholic
- SuperSport Racer
- Posts: 637
- Joined: Mon Jan 15, 2007 1:32 pm
- Location: Scotland
#3
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by Falcoholic » Wed Mar 31, 2010 11:56 am
Because it just does ok!!
And if one of em fails you'll still get home on the remaining three.
The Delicate Sound of Thunder
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dyzio
- Clubman Racer
- Posts: 374
- Joined: Sun Dec 07, 2008 1:41 pm
- Location: Aberdeen'ski
#4
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by dyzio » Wed Mar 31, 2010 11:59 am
Some say, the Falco has a V4 engine
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Samray
- Double World Champion
- Posts: 6234
- Joined: Thu Dec 14, 2006 6:36 pm
- Location: Riding round with Sheene and Simoncelli
#5
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by Samray » Wed Mar 31, 2010 12:03 pm
In spite of the cost of living, it's still popular.
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FlyingKiwi
- SuperSport Racer
- Posts: 766
- Joined: Sun Jan 14, 2007 6:14 pm
- Location: Gogledd Cymru
#6
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by FlyingKiwi » Wed Mar 31, 2010 12:33 pm
rick wrote:So why two plugs per cylinder?
Something to do with more efficient burn
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Falken
- SuperSport Racer
- Posts: 653
- Joined: Wed Jan 17, 2007 7:54 pm
- Location: Chesterfield Derbyshire
#7
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by Falken » Wed Mar 31, 2010 12:44 pm
Because there's two plug holes in each head. Simple.
Adventure before Dementia.
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Aladinsaneuk
- Aprilia Admin
- Posts: 9503
- Joined: Wed Jan 03, 2007 10:37 pm
- Location: Webfoot territory
#8
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by Aladinsaneuk » Wed Mar 31, 2010 1:57 pm
to be better than the boys from bologna
Let's face it, you wouldn't go to a nurse to get good advice on a problem with a Falco - you'd choose an Engineer or a mechanic...
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Willopotomas
- GP Racer
- Posts: 2256
- Joined: Sat Mar 06, 2010 10:11 pm
- Location: Coventry, ENGLAND
#9
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by Willopotomas » Wed Mar 31, 2010 6:30 pm
FlyingKiwi wrote:rick wrote:So why two plugs per cylinder?
Something to do with more efficient burn
You're correct. The combustion chamber will be huge compared to the same displacement in an in-line 4 arrangement. One spark will ignite the fuel/air mix, but some will remain unburned or burn after it's most effective. Twin plugs give the fuel/air mix a better chance to fully combust at the right moment giving you more oomph.. it's not just a gimmick.
Most motorcycle problems are caused by the nut that connects the handle bars to the saddle.
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Falcopops
- GP Racer
- Posts: 2530
- Joined: Mon Dec 18, 2006 4:00 pm
- Location: Back to sweating in the tropics
- Main bike: Still loving the Falco
#10
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by Falcopops » Wed Mar 31, 2010 9:14 pm
It has to have 4 so that the front one can be in a position to make replacement awkward and allow its well to fill up with crap that falls into the chamber when you take it out. Then it's too hard to tighten so it gets left loose then drops out causing all sorts of interesting noises!
So Willop..., how come the newer engines are single sparks?
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D-Rider
- Admin
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- Joined: Wed Jan 03, 2007 1:09 pm
- Location: Coventry
#11
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by D-Rider » Wed Mar 31, 2010 9:25 pm
better combustion chamber design .... twin plug heads help the combustion but better designed combustion chambers don't need twin plugs
“Scientists investigate that which already is. Engineers create that which has never been.”
-- Albert Einstein
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Kwackerz
- Admin
- Posts: 8362
- Joined: Thu Dec 14, 2006 6:16 pm
#12
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by Kwackerz » Wed Mar 31, 2010 9:41 pm
A simple thing like inlet design on later engines can negate the need for twin plugs as they have better swirl inducing properties, meaning the fuel mixes better, ergo burns better. Link that to better volumetric efficiency and youre onto a winner.
Sparkplug design seems to get better by the year too, the same effect can be achieved from a well selected design of sparkplug as can from having two sparkplugs of a more standard nature.
Never ride faster than your guardian angel can fly
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Kwackerz
- Admin
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- Joined: Thu Dec 14, 2006 6:16 pm
#13
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by Kwackerz » Wed Mar 31, 2010 9:43 pm
lol..or in less words, wot DR said.. ffs should have read the bloody thread
Never ride faster than your guardian angel can fly
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Willopotomas
- GP Racer
- Posts: 2256
- Joined: Sat Mar 06, 2010 10:11 pm
- Location: Coventry, ENGLAND
#14
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by Willopotomas » Wed Mar 31, 2010 9:54 pm
Kwackerz wrote:lol..or in less words, wot DR said.. ffs should have read the bloody thread
+1
Most motorcycle problems are caused by the nut that connects the handle bars to the saddle.
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Samray
- Double World Champion
- Posts: 6234
- Joined: Thu Dec 14, 2006 6:36 pm
- Location: Riding round with Sheene and Simoncelli
#15
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by Samray » Wed Mar 31, 2010 10:03 pm
They only need one/pot snce Andy invented the iridium plug.
In spite of the cost of living, it's still popular.
