When talking about automotive performance, i prefer to discuss on engine performance,acceleration, speed rather than other automotive performance such as braking performance or suspension performance.
so throughout this page, we will only discussing on engine performance + transmissions + aerodynamics effect on acceleration + acceleration + speed
Feel free to share if readers got some brilliant ideas too. ^_^
One of contributing factor that effecting engine performance is air fuel ratio (a/f). Correct air fuel ratio will ensure your engine run at maximum power at designated fuel consumption, means that you will get either or both maximized mileage, acceleration, performance or speed at any amount of fuel being consumed. ( perfect fuel burned at combustion chamber)
I assumed that readers already knew that ideal air fuel ratio is 14.7:1 ( means 14.7 portion of air mixed with 1 portion of fuel delivered to combustion chamber). Most factory stock vehicle are tuned with this air fuel ratio before being submitted to customers ( in some case, customer need to visit service center to obtain this tuning as manufacturers provide after sales tuning)-especially for fuel injected type engine.
the mixture can be considered as lean if a/f value are more than 14.7:1 (means that more air portion than fuel portion)
the mixture can be considered rich if a/f value are lesser than 14.7:1 (means that less air portion than fuel portion)
But when talking about engine for performance, we are not targeting 14.7:1 as our a/f ( in my opinion )
engine for performance means the engine are built to produce more power output regardless of how much fuel being consumed or how efficient the engine works. On the other side, more power production by engine is proportional to more acceleration + speed ( neglecting transmissions + aerodynamics effect )
So in this case, performance engine do always require a rich air fuel mixture.( a/f will be always lesser than 14.7:1 )
Performance engine a/f differ according to the engine nature: 1. Natural aspirated engine (N/A) 2. Forced induction engine ( turbo charged/super charged )
* In my opinion... 1. For N/A type engine the a/f will range from 13.1 to 13.5 2. For Forced induction engine the a/f will range from 12.1 to 12.6 when boosted.
So its up to the tuner creativity to manipulate engine's characteristics using additional tool in order to tune up the engine....all i can say that each engine posses different way of tuning due to many matters such as engine's material - blocks,head etc.
When talking about automotive performance, i prefer to discuss on engine performance,acceleration, speed rather than other automotive performance such as braking performance or suspension performance.
ReplyDeleteso throughout this page, we will only discussing on engine performance + transmissions + aerodynamics effect on acceleration + acceleration + speed
Feel free to share if readers got some brilliant ideas too. ^_^
AIR FUEL RATIO:
ReplyDeleteOne of contributing factor that effecting engine performance is air fuel ratio (a/f). Correct air fuel ratio will ensure your engine run at maximum power at designated fuel consumption, means that you will get either or both maximized mileage, acceleration, performance or speed at any amount of fuel being consumed. ( perfect fuel burned at combustion chamber)
I assumed that readers already knew that ideal air fuel ratio is 14.7:1 ( means 14.7 portion of air mixed with 1 portion of fuel delivered to combustion chamber). Most factory stock vehicle are tuned with this air fuel ratio before being submitted to customers ( in some case, customer need to visit service center to obtain this tuning as manufacturers provide after sales tuning)-especially for fuel injected type engine.
the mixture can be considered as lean if a/f value are more than 14.7:1 (means that more air portion than fuel portion)
the mixture can be considered rich if a/f value are lesser than 14.7:1 (means that less air portion than fuel portion)
But when talking about engine for performance, we are not targeting 14.7:1 as our a/f ( in my opinion )
engine for performance means the engine are built to produce more power output regardless of how much fuel being consumed or how efficient the engine works.
On the other side, more power production by engine is proportional to more acceleration + speed ( neglecting transmissions + aerodynamics effect )
So in this case, performance engine do always require a rich air fuel mixture.( a/f will be always lesser than 14.7:1 )
Performance engine a/f differ according to the engine nature:
1. Natural aspirated engine (N/A)
2. Forced induction engine ( turbo charged/super charged )
* In my opinion...
1. For N/A type engine the a/f will range from 13.1 to 13.5
2. For Forced induction engine the a/f will range from 12.1 to 12.6 when boosted.
So its up to the tuner creativity to manipulate engine's characteristics using additional tool in order to tune up the engine....all i can say that each engine posses different way of tuning due to many matters such as engine's material - blocks,head etc.
ReplyDelete