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M's Factory
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5,240 Posts
Discussion Starter #1
THis is only something I have put together and really you should consider it to be discussable with a Tuner of your choice to get the max out of your car you want. But for those who want to know varying parts for things to ask for.


Advanced Ignition Timing

Advantage
Moves peak cylinder pressure close to top dead center. Puts more energy to the piston and less to the exhaust, water, and oil.

Disadvantage
Can build peak cylinder pressure beyond the threshold of detonation.

Retarded Ignition Timing

Advantage
Can forestall detonation by moving peak cylinder pressure further past top dead center.

Disadvantage
Can cause high exhaust and water temperatures. Power will be lost.

Richer Air/Fuel Ratio

Advantage
Cooling effect stabilizes combustion on long wide-open throttle runs.

Disadvantage
If too rich, fouled spark plugs and loss of power can occur.

Leaner Air/Fuel Ratio

Advantage
Many modern engines will produce slightly higher power if the air fuel ratio is leaner by a small amount.

Disadvantage
Not a recommended technique. Can generate detonation during long hard runs.

Larger Turbocharger

Advantage
Properly sized for the application, larger turbos produce a cooler denser air charge due to less "Beating of the Air" and more compressing. Also lower pressure between exhaust valve and turbine wheel.

Disadvantage
Increased lag due to heavier moving parts and less low-speed efficiency.

Higher Compression Ratio

Advantage
Better efficiency and lower brake-specific fuel consumption (fuel-to-power ratio).


Disadvantage
May not allow higher boost levels that could have produced more power than any gain from the increase in compression ratio.

Larger Intercooler

Advantage
Reduces air temperature to increase threshold of detonation. Increases air charge density, delivering more oxygen per stroke. Also less pressure drop across intercooler.

Disadvantage
Slight lag increase due to larger volume.

Larger Fuel Injectors

Advantage
Allows ECU to deliver the intended amount of fuel when the stock injector is opening more than 90% of the available time.

Disadvantage
Harder to control emissions and idle stability due to smaller pulse widths at low speed.
 

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M's Factory
Joined
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5,240 Posts
Discussion Starter #3
You should know that Mr A/F Ratio Meter Man :)

12.1 / 13.1 is what most people revolve around in theory. There are many thoughts on this.
 

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M's Factory
Joined
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5,240 Posts
Discussion Starter #5
Depends on what your application is, if it involves top speed for a timed duration then yes I agree it is, but if it is only for short spurts then it is acceptable.
 

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M's Factory
Joined
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5,240 Posts
Discussion Starter #8
LOL Richard

Isaac Me thinks they would be made from your own hands mush.
 
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