The spark occurs when the Magnet passes the trailing edge of the hall effect sensor in a CCW rotation, when the buzzer stops sounding is when the spark occurs,and to my knowledge thats when the timing can be set at 28 degrees BTDC. Can be easily checked by removing plugs turning engine with ignition on, youll here the plug fire when the magnet passes hall effect sensor.
Thank you. I am an engine builder and motorcycle racer. But new to the gasoline RC engines. I watched a number of videos and this was confusing. So I appreciate your explanation
I'm having problems with my DLE twin 40 after starting. I think it is the timing is off because both cylinders may not be firing simultaneously. Will adjust my timing to see if I get better results.
Mixture is the biggest cause of peoples tuning problems, timing the most frequent cause of poor performance after that. Plug brand and gap is another important factor. NGK Cm6 is the best plug, gapped @ .020. My 170 came with DLE Iridium plugs, so far they are working good but time will tell if I'll go back to the NGK's.
@@tomrc4328 Thanks! I finally managed to get a smooth idle by following someone’s advice… move the sensor all the way to the left…. Now the engine finally runs great at low RPM ( high RPM has always been good)
Another way is with a piston stopper, essentially something that threads into the spark plug hole to stop the piston. Preferably something non marring (often 3D printed plastic). You then rotate the engine and see what the degree wheel says when it stops in both directions. Say you get 30 and 38, if you adjust the degree wheel on the crankshaft so it says 34 and 34, then you know 0 is now TDC.
Timing is measured from spark to top dead center and everything else is confusing Le timing se mesure entre l'étincelle et le point mort haut et tout le reste porte à confusion
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The spark occurs when the Magnet passes the trailing edge of the hall effect sensor in a CCW rotation, when the buzzer stops sounding is when the spark occurs,and to my knowledge thats when the timing can be set at 28 degrees BTDC. Can be easily checked by removing plugs turning engine with ignition on, youll here the plug fire when the magnet passes hall effect sensor.
Thank you. I am an engine builder and motorcycle racer. But new to the gasoline RC engines. I watched a number of videos and this was confusing. So I appreciate your explanation
Glad I could help. Such a fun hobby!
Thank you. Had to watch the video a few times to understand how this works. )
Just found your channel and Subscribed. Interesting. Very nice job
Love the sound of the EMD's in the background.
Hello, EMD SD 70 with Nathan M3 air horn, or GE es ac 44 with Nathan M3 air horn ? Greeting from France.
Hello, very funny the air horn train. Greeting from France.
When to inject fuel, at what degree, when we are designing the ECU?
I'm having problems with my DLE twin 40 after starting. I think it is the timing is off because both cylinders may not be firing simultaneously. Will adjust my timing to see if I get better results.
Mixture is the biggest cause of peoples tuning problems, timing the most frequent cause of poor performance after that. Plug brand and gap is another important factor. NGK Cm6 is the best plug, gapped @ .020. My 170 came with DLE Iridium plugs, so far they are working good but time will tell if I'll go back to the NGK's.
Great video, thanks! How do you find the TDC? I’m having issues with the idle of my DLE 30 ; thanks
Thanks. Pull the spark plug and use a screwdriver, or something equivalent, in the hole while you rotate the crank to TDC.
@@tomrc4328 Thanks! I finally managed to get a smooth idle by following someone’s advice… move the sensor all the way to the left…. Now the engine finally runs great at low RPM ( high RPM has always been good)
Another way is with a piston stopper, essentially something that threads into the spark plug hole to stop the piston. Preferably something non marring (often 3D printed plastic). You then rotate the engine and see what the degree wheel says when it stops in both directions. Say you get 30 and 38, if you adjust the degree wheel on the crankshaft so it says 34 and 34, then you know 0 is now TDC.
What is that degree measuring device called?
Timing is measured from spark to top dead center and everything else is confusing
Le timing se mesure entre l'étincelle et le point mort haut et tout le reste porte à confusion
How did you locate TDC at zero?
Does anybody know how to set a multimeter to read ohms through sensor? Does ignition need to be on? Y cable ? Thanks!
You should have rotated the engine under compression first then rotated up to TDC, might be a little slack there!
Compression has nothing to do with this. The hub magnet is where you are measuring your timing, that's a fixed location in relation to the crank.