Does advancing timing Increase temperature?
Advancing ignition timing increases engine temperatures. As you increase towards MBT you get more power but temperatures may get so high that you melt a through the combustion temperature + compression increasing temperatures.
What happens when the timing is advanced, and why is it so?
Ithas long been held, and demonstrated at the Club’s DynoDays, that advancing the timing to 13 to 14 degrees before top dead centre (BTDC) is a cheap way of achieving lower rpm performance in the Mazda MX-5 1.6 litre cars. So what happens when the timing is advanced, and why is it so?
Is it OK to have 30 degrees of advance at idle?
30 degrees BTDC at idle is very excessive unless you are checking the timing with the vacuum advance connected to full manifold source at the time. Your timing (both initial and Total mechanical) is checked and set with the vacuum advance disconnected and plugged.
Which is too much advance or too little advance?
The Ford reference is saying: Which means – with a total advance of 38°, the initial timing seen on the engine with a timing light would be 16°BTC to 21°BTC. In any case, timing should be set for best torque (even at idle), as too much or too little timing at any specific load and RPM will lose efficiency, reducing both power and mileage.
How much advance is too much on a 302?
I have never seen a 302/5.0 that liked more than 36 degrees total (disregarding the vacuum advance). Most make the most power with 34 or slightly less. The only way to know for sure is to tune it on a dyno. You need to have the advance plate modified for less mechanical advance so you can use a fair amount of initial advance.
What happens when you increase the timing advance?
Increasing the timing advance raises the high-end power, reducing the low-end. Decreasing the timing advance raises low-end power, reducing the high-end. Example: Magneto timing was reduced 6 degrees in our blown alcohol drag racer, and our low-end 60-foot times were quicker by 0.05 seconds from more low-end power.
30 degrees BTDC at idle is very excessive unless you are checking the timing with the vacuum advance connected to full manifold source at the time. Your timing (both initial and Total mechanical) is checked and set with the vacuum advance disconnected and plugged.
What happens when the timing is advanced at 900 rpm?
By advancing the timing by 4 degrees you start the ignition process 0.741 (0.18519 X 4) milliseconds sooner at 900-rpm (0.111 milliseconds at 6,000 rpm). 10. At 900 rpm it takes 4.629 milliseconds for the crank to travel the 25 degrees from 10 degrees before TDC to 15 degrees after TDC.
The Ford reference is saying: Which means – with a total advance of 38°, the initial timing seen on the engine with a timing light would be 16°BTC to 21°BTC. In any case, timing should be set for best torque (even at idle), as too much or too little timing at any specific load and RPM will lose efficiency, reducing both power and mileage.