Knock Sensor
09-14-04, 02:47 PM
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No turbo for me...BOOOHOOOO
Nope, no turbo, but the reason I asked is that I could use an A/F gauge and the knock sensor reading to fine tune my carb. Logically this should work, eh?
T
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09-14-04, 03:45 PM
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A knock occurs because of a lean condition. A proper wideband A/F guage will tell you when there is a lean condition. Knock sensor is redundant in your case.
An EFI engine can make use of a knock sensor because it can detect a lean condition and add fuel or pull timing. If you were using a computer controlled ignition you could make use of the senor and retime the spark to keep a knock (lean condition) from blowing the motor. Then again, if your carb was tuned properly using the A/F readings that should never happen unless something Really Bad TM happens. In that case the knock sensor probably won't correct the fault in time to save anything.
An EFI engine can make use of a knock sensor because it can detect a lean condition and add fuel or pull timing. If you were using a computer controlled ignition you could make use of the senor and retime the spark to keep a knock (lean condition) from blowing the motor. Then again, if your carb was tuned properly using the A/F readings that should never happen unless something Really Bad TM happens. In that case the knock sensor probably won't correct the fault in time to save anything.
09-14-04, 10:01 PM
#7
FB+FC=F-ME
With such a low compression ratio,and inheriently rich mixture requirments,a N/A rotary has little use for a knock sensor.Even the higher comp S5 N/A engines didnt have knock sensor.Renesis might have one,due to its leaner running characteristics from the side intake ports.
Unless you crank the timing ahead a lot, and run some really sh*tty gas,I doubt a knock sensor would be tripped often/ever.I always ran CA **** 87 octane and I beat my 12A and 13B hard.Even with Yaw spec advanced timing,in 5 years I never heard a single ping or knock from my N/A engines.Even the turbo motors have never knocked,although I do run premium and stock timing in them.
Even a cheap narrowband A/F guage is a good tuning tool for a carb'd car.Itll get you close enough to keep the power and economy in balance.On an EFI car, they are useless.......
Unless you crank the timing ahead a lot, and run some really sh*tty gas,I doubt a knock sensor would be tripped often/ever.I always ran CA **** 87 octane and I beat my 12A and 13B hard.Even with Yaw spec advanced timing,in 5 years I never heard a single ping or knock from my N/A engines.Even the turbo motors have never knocked,although I do run premium and stock timing in them.
Even a cheap narrowband A/F guage is a good tuning tool for a carb'd car.Itll get you close enough to keep the power and economy in balance.On an EFI car, they are useless.......
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