ECU Chip Tune - Ignition Timing - Increase Horsepower

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How to increase horsepower through ignition timing. How does ignition timing affect horsepower? Should an engine advance or retard timing to increase horsepower? This video explains the logic behind ignition timing tuning.
NOTE: "Knock occurs when the peak of the combustion process no longer occurs at the optimum moment for the four-stroke cycle." ~ Wikipedia. What happens when the timing is too advanced is the maximum pressure occurs before TDC, which pushes down on the piston when it is still coming up. This is what you are attempting to avoid when advancing timing.
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Опубликовано:

16 апр 2013

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@VoraciousPhantasma 9 лет назад

One thing I found out when looking into timing experiments for my Miata, the higher octane gas you're running, the less likely you are to have knock at higher timing degrees. For instance, my little 1.6L engine will knock if it's running on 87 with the timing advanced from 10 to 12 degrees BTDC, but if I run 93 octane, I can advance the timing all the way to 18 degrees before it starts to knock. Just thought I'd add that.

@johnathonvandurme702 7 лет назад

Yes, thanks to one of the fathers of engines, Sir Harry Ricardo.

@oldfashionedwrx3574 7 лет назад

VoraciousPhantasma that's because octane is the measure of resistance to knock. if you use higher octane fuels you can run more parameters to generate power before you reach the knock threshold.

@ryanlee112 7 лет назад

thats because the octane of gas is the resistance to knock. e85 has around a 113 octane thats why people can make more power with it

@Bassix92 7 лет назад

Jared Tate I thought octane was resistance to detonation/pre-detonation, requiring a higher flash point with higher octane ratings thus ensuring that combustion won't happen simply from the pressure and/or heat that occurs from internal combustion (unless it's diesel which runs off compression once started) but from the actual spark plugs, which in turn allows for more aggressive and advanced timing and tuning setups. That allows a bigger safety buffer against knock the higher the octane used because it's rated to not combust earlier than desired. that's what I was taught growing up and why I always run at least 91 just for the added peace of mind and it actually increases gas milage because it burns more efficiently and the ECU (stock or not) picks that up and adjusts the AF ratio accordingly

@tonytober 6 лет назад

We refer "knock" to the sound that detonation/pinging does when the engine is running. We're all talking about the same thing here, so you're right.

ECU Chip Tune - Ignition Timing - Increase Horsepower

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