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20-05-2006, 12:34 AM
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#1
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Registered User
Boat make: Phantom 23
Join Date: Mar 2006
Posts: 1,693
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What
IS A ENGINE
KNOCKMETER?
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20-05-2006, 12:35 AM
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#2
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Registered User
Join Date: Mar 2004
Posts: 6,891
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Not specifically heard of a knockmeter, but have heard of a knock sensor. Assuming it does the same job, it detects detonation.
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20-05-2006, 12:39 AM
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#4
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The Doc
Join Date: Mar 2004
Posts: 8,291
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dare i ask why you want to know?
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20-05-2006, 12:41 AM
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#5
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Registered User
Boat make: Phantom 23
Join Date: Mar 2006
Posts: 1,693
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just intrested!
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20-05-2006, 12:48 AM
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#6
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Registered User
Join Date: Mar 2004
Posts: 6,891
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Yeh, same thing.
If yer engine is on the borderline, it'll start knocking before it detonates and blows itself to shit. This baby, (allegedly) lets you monitor it.
Most modern car efi systems have it built in so if the engine starts knocking it retards the ignition automatically.
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20-05-2006, 12:54 AM
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#7
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Registered User
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer
Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
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its like egt's and overheat lights they let you know as it goes pop. just incase you are deaf and didnt hear it
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20-05-2006, 12:57 AM
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#8
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Registered User
Join Date: Mar 2004
Posts: 6,891
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I would tend to agree with that
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20-05-2006, 01:02 AM
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#9
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Registered User
Boat make: Phantom 23
Join Date: Mar 2006
Posts: 1,693
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Quote:
Originally posted by Matt
Yeh, same thing.
If yer engine is on the borderline, it'll start knocking before it detonates and blows itself to shit. This baby, (allegedly) lets you monitor it.
Most modern car efi systems have it built in so if the engine starts knocking it retards the ignition automatically.
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cool! thanks fot that
doya think its worth getting 1?
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20-05-2006, 01:18 AM
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#10
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Registered User
Country: UK
Location: Weston Super Mare
Occupation: Electrical Engineer
Join Date: Mar 2004
Location: Weston Super Mare
Posts: 6,351
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for most people no but for you yes cus you might as well get another thing to look at rather than looking where you are going
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20-05-2006, 12:40 PM
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#11
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Registered User
Country: England
Location: Cowes, Isle of Wight
Occupation: Marine engineer/electrician
Interests: Boat, Landy, and other toys :)
Boat name: Mad Max/Master Fiddler
Boat make: Phantom 18/Fletcher Bravo
Engines: Merc XR2
Cruising area: Solent/IOW
Join Date: Dec 2005
Location: Cowes, Isle of Wight
Posts: 935
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Quote:
Originally posted by PuppiesBalls
cool! thanks fot that
doya think its worth getting 1?
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You should easily be able to hear if either end starts knockin...and if you do then STOP!!
Uncle didn't on the 04 Poker Run despite bein warned.....then there was a nasty noise...somethin like 9 holes in the block and no more 2.5efi
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Life is not a journey to the grave with the intention of arriving safely in a pretty and well preserved body, but rather to skid in broadside, thoroughly used up, totally worn out, grinning from ear to ear, overdosing on adrenaline and proclaiming “KINNEL!! WHAT A RIDE!!”
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20-05-2006, 02:04 PM
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#12
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hello
Join Date: Mar 2004
Posts: 2,739
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I believe its a microphone with a filter thingy that basically listens for the distinct sound of knocking, which as Mat says is the first signs of detonation. Modern ignition systems have them to allow constant adjustment of the timing keeping it as advanced as possible and thus produce maximum power/efficiency without causing detonation. You could use it to set up your timing but the next time out you may have craper fuel and/or more weight in the boat etc. As you have far more power than you need just set the timing to the value recomended by the experts and don't worry about the 5hp you may have lost by not running it on the ragged edge.
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20-05-2006, 02:13 PM
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#13
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hello
Join Date: Mar 2004
Posts: 2,739
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Just pre-empting you here but no you don't need a Lambda (exhaust gas oxygen) sensor either.
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20-05-2006, 02:38 PM
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#14
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Registered User
Boat make: Phantom 23
Join Date: Mar 2006
Posts: 1,693
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Quote:
Originally posted by Johnny Boat Dude
Just pre-empting you here but no you don't need a Lambda (exhaust gas oxygen) sensor either.
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ooo..show me a link how much.. where from ? will it make us go faster
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20-05-2006, 08:04 PM
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#15
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Registered User
Join Date: Mar 2004
Posts: 6,891
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I believe Lambda Sensors have a short life on 2 srokes due to the oil.
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