Knocklink/ Lamdba link/ Air flow Gauge Essentiall?
15 April 2003, 11:26 PM
#1
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I am getting my car full decatted next wek with a scoobysport system. It is a 98 v5 sti and i have been looking through a few threads and alot of you guys have these gauges installed. Are these essential or what would i need? Cheers Gary
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16 April 2003, 11:10 AM
#8
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It simply listens for and displays the magnitude of Knock (aka detonation/det and pinking).
The "Knocklink" is actuall a trademark of Link Management Systems, but people tend to generalise and call any knock sensor/display a knocklink.
Your car already has a knock sensor, which the ECU monitors. Is has been known for the ECU to ignore the knock sensor abover certain RPM plus you are relying on the ECU to compensate automatically. You also have no way of knowing how bad it was, if it happened and if it's happening often.
If you fit a knock display you can at least see when it happens, how bad it is and can then back off. It can happen if you've just filled up and have a particularly bad batch of fuel.
Stefan
The "Knocklink" is actuall a trademark of Link Management Systems, but people tend to generalise and call any knock sensor/display a knocklink.
detonation is a form of abnormal combustion that can cause engine damage. It occurs when a combination of too much heat and pressure exceed the octane rating of the fuel. The fuel ignites spontaneously and explosively, causing a sudden rise in cylinder pressure that produces a metallic pinging or knocking sound. like a marble in a tin can. Detonation can be caused by excess spark advance, low-octane fuel, lean air/fuel mixtures, and/or overheating. Carbon buildup inside the combustion chambers and on the piston face can also increase compression sufficiently to cause detonation. Mild detonation is not harmful, but heavy detonation can damage valves, pistons, rings and rod bearings. It can also cause elevated HC emissions. Detonation can be caused by over advanced timing, a lean fuel mixture, overheated engine or faulty knock sensor.
If you fit a knock display you can at least see when it happens, how bad it is and can then back off. It can happen if you've just filled up and have a particularly bad batch of fuel.
Stefan
16 April 2003, 11:12 AM
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Well at least we agree hypoluxa 
See this bit on Bob's site for the knocklink.
http://www.brdevelopments.com/link.html
See this bit on Bob's site for the knocklink.
http://www.brdevelopments.com/link.html
16 April 2003, 11:44 AM
#12
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Shouldn't be any more than £150 including the external Bosch sensor. Don't go cheap and try tapping into the existing sensor wires as it'll affect the readings.
Stefan
Stefan
16 April 2003, 12:14 PM
#16
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You can get one from BR Development or JW Racing for starters.
The MRT one will just be the display. It's roughly £70-£80 for the display and £60-£70 for the sensor.
The sensor is way overpriced considering it's just a Bosch one that can be had for about £20 less.
Stefan
The MRT one will just be the display. It's roughly £70-£80 for the display and £60-£70 for the sensor.
The sensor is way overpriced considering it's just a Bosch one that can be had for about £20 less.
Stefan
16 April 2003, 12:50 PM
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You linked to an AFC computer? This can alter MAF readings to crudely alter fuelling and timing together, but remapping the original or an aftermarket ECU gives you far more control.
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