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ignition knock
Posted: Thu Feb 07, 2008 12:16 pm
by alfa boxer
How can you tell when an engine is knocking due to being advanced too far its difficult to tell by the seat of your pants, i have no pinging anywhere in the map that i can tell of by ear. i will soon have an lm1 installed to check fueling if i find that i am running rich/lean in areas of the map will increasing/decreasing the timing slightly in these areas help power.
i would also like to use the data log from the lm1 with info from the mjlj to be able hopefully make a correct timing adjustment. can any one help with a very detailed acount of how to----
many thanks again lee.
Posted: Thu Feb 07, 2008 1:09 pm
by Salamander
hi, i read one thread of adapting a knock sensor read by voltmeter, one or five(detonating), i try to search the post to upload here.
search in google
Posted: Thu Feb 07, 2008 6:58 pm
by david jenkins
Lee,
You might find this thread very interesting and useful...
PH Link
In the end I used a knock sensor to drive an amplifier, then into a pair of ear-protector headphones.
My web site
Follow the link to 'special tools and parts' and 'knock detection circuit'.
David
Posted: Thu Feb 07, 2008 7:27 pm
by Salamander
Posted: Tue Feb 12, 2008 6:49 pm
by luke6040
i like the idea of hookin the knock sensor up to some headphone, so i went out and got 1 4 a fiver but its a 3 pin type will this work?
Posted: Wed Feb 13, 2008 5:15 pm
by britlude
back to the original question, in my case the engine use to stutter/bog as a stamped the throttle, mixture very rich because of the accelerator pumps, dialing more advance where it stuttered on the map has greatly reduced it.. remember a 'wet' mixture burns slower so needs more advance!
so altering the timing in the rich/lean areas will smooth out the power!