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April 11th, 2005, 11:38 PM   #1
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ignition timing using a strobe

not really comfortable with back lights and stuff like that so i was wodering how folk best do their ignition timing?

i prefer a strobe

but at what revs do you check when you don't have a revcounter?

which position for the high/low switch?

i have re-marked the crank 7 degrees in advance of the two marks that are there now. this is the correct TDC. however when i check the timing with the strobe, the advance curve goes past the two lines and out to the left as the marks go to the right!

i can make the timing marks line up at tickover but on full advance i think it sails past a line i marked at 17d (double it for 34d) and i reckon the advance at high rpm is nearer 40+d.

your thoughts?

BTW, mikst et al. anyone else get there SEM 'modified' in sweden?

regards

Taffy
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April 12th, 2005, 04:35 PM   #2
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Hi Taffy,
regarding total advance:

36 degrees (+2 / -2) BTDC

Best Regards,
Dale
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April 12th, 2005, 11:25 PM   #3
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and the revs dale?

hi or lo at the switch?

cheers

Taffy
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April 13th, 2005, 06:33 AM   #4
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Hi Taffy,
Above 6,000 rpm the advance is identical between the two.
Below 6,000 rpm the low range has a slower rate of advance.
Full advance either way @ or above 6,000 rpm.

Hope this helps.

Sincerely,
Dale
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April 13th, 2005, 01:29 PM   #5
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cheers dale. will try everything on sunday. LX2 starts second kick and the camgear is immediately quieter!

sunday = camshaft, jetting, ignition timing, new rekluse setting.

regards

Taffy
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April 13th, 2005, 01:32 PM   #6
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Hi Taffy,
Looking forward to your evaluation.

Dale
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April 15th, 2005, 06:13 AM   #7
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timing light setup?

I have been used a timing light on cars before. What I like is how to check rpms and timing on the Husabergs. The timing light should not be a problem, but to check rpms I do not know what test points to attach to or what type of gauge to use?

Mars
2001 Husagerg FC550, Dick's Racings suspension mods, 15% Methanol plus 93 Octane pump gas.
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April 15th, 2005, 06:45 AM   #8
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Hi Mars,

Some of us have miniature digital tachometers on our bikes. If you don't, then any automotive multifunction analyzer will do. They have an inductive pick that clamps over your spark plug wire. When you select the read out scale just remember that the Berg spark plug is fired every revolution of the crank.

Joe
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April 15th, 2005, 07:49 AM   #9
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timing light

Thanks Joe

Mars
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July 7th, 2005, 09:24 PM   #10
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I made a paper degree scale and siliconed it to the edge of the flywheel so that 0 deg ended up in the middle of the peep hole at tdc. Then a "needle" was made from a red miniature zip tie and was glewed on the inside of the ignition cover. With a simple strobe it is now possible to directly read the point of ignition as you rev the engine, and with fair accuracy too.
Funnily, just as Taffy did, I found the ignition firing well above 40 degrees when revving in spite to having aligned the marks according to the manual. The scale only fathomed the range 35 deg before tdc to 10 after so it hard to tell exactly where it fired.
What if the ignition point is adjusted to the 36 deg +/-2 @ 6000 rpm that LINEAWEAVER suggested, what will happen to starting and idling?
At how many deg before tdc will starting be easiest?
At how many deg before tdc will the engine get a good, strong and rock steady idling? Any ideas?
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