15 degrees BTDC (Before Top Dead Center) refers to the position of the piston in an internal combustion engine relative to the top of its stroke. Specifically, it indicates that the piston is 15 degrees before reaching the topmost point of its travel during the compression stroke. This timing measurement is crucial for optimizing engine performance, as it affects when the fuel-air mixture is ignited in relation to the piston's position. Proper timing ensures efficient combustion and power delivery.
cos(15 deg) = 0.9659, approx.
82.2 deg C = 179.96 deg F
The most basic example you can have entails adding the positive and negative of the irrational to get zero: e + -e = 0 Another example you can give is to use compound angle formulae with trig: sin(15 deg)cos(75 deg) + sin(75 deg)cos(15 deg) = sin(90 deg) = 1
59 degrees F.
15 degrees C
1 (0 deg BTDC) - 5 (480 deg BTDC) - 3 (240 deg BTDC) - 6 (600 deg BTDC) - 2 (120 deg BTDC) - 4 (360 deg BTDC)
10 deg. BTDC aon an automatic, 5 deg btdc on manual
Stock ignition timing at idle is 6 deg BTDC +/- 1 deg. I like to set mine for about 7 or 8 deg BTDC. Kyrasis6 Mazdatruckin.com
8 deg. BTDC
10 deg BTDC
the factory setting is 6deg btdc, but mine seams to run better at about 7-8 deg btdc
6 deg BTDC
12 deg btdc with coolant sensor unplugged
12 deg btdc @ 900 rpm
Just set timing for 4 deg BTDC on my 69 runs great.
my corvette book says it should be for basic 4 deg btdc
YES IT IS + OR - 1 TO 2 DEGREES BEFORE TDC...