Exactly. Only a total hard head would make something so complicated outta somethin so simple.
How to - Hillbilly Timing Tape
- Thread starter crackedback
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Exactly. Only a total hard head would make something so complicated outta somethin so simple.
Rapid Robert
Well-Known Member
You know I thought about it & you're right, a quarter turn (noon to 3 o'clock for instance) is gonna be/read the same on a wristwatch as in a big wall clock just a different diameter. I stand corrected, thank you!
= WTF I don't care
This thread got polluted long ago. Simple method to do things. Want to do it different, have at it. @RustyRatRod
Much the same as the accuracy of the MSD bushings, one being .002 larger than another. You aren't going to get an engine timed to a level of precision using manual inputs where the margin for error exceeds your manufacturing tolerances. If you can pick up on .01 degree difference with a light.. you're darn good!
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It's all so incredible. I'm speechless......which don't "happen often". LOL
@4spdragtop
Part of the reason I only do two marks is you don't have to figure out which one is which if you place 6-8 marks on the balancer. If you where to make the marks different lengths, all across for 10* levels and half for 5* to differentiate, that would be good.
The only time math comes into play is when you are actually timing the engine. the 15 mark will allow for timing from 5-25, the 30 mark from 20-40.
Part of the reason I only do two marks is you don't have to figure out which one is which if you place 6-8 marks on the balancer. If you where to make the marks different lengths, all across for 10* levels and half for 5* to differentiate, that would be good.
The only time math comes into play is when you are actually timing the engine. the 15 mark will allow for timing from 5-25, the 30 mark from 20-40.
Lol hey rob I was only posting the math to show more than 12 ways to fillet a fish or skin a cat. Helping convalute things lol!
Tuna, Halibut, trout all filet a bit different... you needed a x squared exponent in your math equation to account for that LOL @4spdragtop
pishta
I know I'm right....
I dont think it even needs to know if its a 6, 5 or a 1 as you are clipping onto the #1 plug wire, not the coil wire. I knew it had to do with measuring the pulse width , just didnt know how they slowed it down ('cause you cant speed it up) , variable capacitor charge time?
KitCarlson
Well-Known Member
I was totally wrong! Trying to reply, while baby sitting an active 3 yr old.
#1 fires every 2 engine revolutions. That time divided by 720, times the desired set back. Same formula. Doing that with uC is easy, analog means sounds iffy.
Never used or owned a set backing light.
Systems I build and use measure RPM based on reference sensors, calculate ignition timing and coil charge for every ignition event. Timing is available in car, and logged for analysis. I only use a timing light to verify static timing. My sensors trigger at zero speed, so not errors related to variable reluctance triggers.
#1 fires every 2 engine revolutions. That time divided by 720, times the desired set back. Same formula. Doing that with uC is easy, analog means sounds iffy.
Never used or owned a set backing light.
Systems I build and use measure RPM based on reference sensors, calculate ignition timing and coil charge for every ignition event. Timing is available in car, and logged for analysis. I only use a timing light to verify static timing. My sensors trigger at zero speed, so not errors related to variable reluctance triggers.
Don't ask me how I stumbled on to this thread.....................
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