Things to know/consider when building
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B*a*n*n*e*d
Joined: Sep 2014
Posts: 82
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Things to know/consider when building
So as far as turbocharging and engine building in general I've found that the following are good to have:
% Oxygen in air: roughly 20.95%
Airflow @ a given rpm
Bore
Brake Mean Effective Pressure
Brake Specific Fuel Consumption
BTU's per gallon of gasoline: 114,000
Camshaft advance angle
Camshaft lift duration
Camshaft lobe height (lift)
Compression Ratio
Displacement
EPC (Engine Performance Coefficient)
Firing order
Fuel flow in gallons per hour
Fuel flow in pounds per hour
Fuel Injector pulse width
Fuel injector size
Fuel pressure
HP @ a given rpm
MAP Readings*
Mean Piston Speed
Oil capacity
Sea-level-standard-day atmospheric conditions: 14.7 lb/ in2, 15 °C (59 °F)
Specific gravity of gasoline: 0.71
Stroke
Swept Cylinder Volume
Torque @ a given rpm
Turbocharger A/R
Turbocharger wheel diameter
Turbocharger wheel trim
Vacuum created
Valve spring pressure
Volumetric Efficiency
Weight of air: 0.0807 lbs per cubic foot
Weight of gasoline: 6 lbs per gallon
Lets add to the list
% Oxygen in air: roughly 20.95%
Airflow @ a given rpm
Bore
Brake Mean Effective Pressure
Brake Specific Fuel Consumption
BTU's per gallon of gasoline: 114,000
Camshaft advance angle
Camshaft lift duration
Camshaft lobe height (lift)
Compression Ratio
Displacement
EPC (Engine Performance Coefficient)
Firing order
Fuel flow in gallons per hour
Fuel flow in pounds per hour
Fuel Injector pulse width
Fuel injector size
Fuel pressure
HP @ a given rpm
MAP Readings*
Mean Piston Speed
Oil capacity
Sea-level-standard-day atmospheric conditions: 14.7 lb/ in2, 15 °C (59 °F)
Specific gravity of gasoline: 0.71
Stroke
Swept Cylinder Volume
Torque @ a given rpm
Turbocharger A/R
Turbocharger wheel diameter
Turbocharger wheel trim
Vacuum created
Valve spring pressure
Volumetric Efficiency
Weight of air: 0.0807 lbs per cubic foot
Weight of gasoline: 6 lbs per gallon
Lets add to the list
Thread Starter
B*a*n*n*e*d
Joined: Sep 2014
Posts: 82
Likes: 0
Re: Things to know/consider when building
Ideal gas law: pV=NRT (p=pressure,v=volume,n=amount,r=ideal gas constant,r=temperature)
Air/Fuel ratio: Proportion of air to fuel. The ideal ratio or "stoichiometric" ratio is said to be 14.7:1 for gasoline (14.7 parts air to 1 part fuel), though I've heard as rich as 12:1 and as lean as 15.7:1. Leaner mixtures tend to create more power but are subject to the likelihood of pre-ignition or detonation. Where as a richer mixture burns slower but can foul plugs and cause excessive emissions.
Air/Fuel ratio: Proportion of air to fuel. The ideal ratio or "stoichiometric" ratio is said to be 14.7:1 for gasoline (14.7 parts air to 1 part fuel), though I've heard as rich as 12:1 and as lean as 15.7:1. Leaner mixtures tend to create more power but are subject to the likelihood of pre-ignition or detonation. Where as a richer mixture burns slower but can foul plugs and cause excessive emissions.
Honda-Tech Member
Joined: Mar 2012
Posts: 954
Likes: 2
From: Seattle
Re: Things to know/consider when building
So as far as turbocharging and engine building in general I've found that the following are good to have:
% Oxygen in air: roughly 20.95% - wat
Airflow @ a given rpm - tuner's concern
Bore - - given
Brake Mean Effective Pressure - wat
Brake Specific Fuel Consumption - wat
BTU's per gallon of gasoline: 114,000 - i put gas in it....?
Camshaft advance angle -
Camshaft lift duration -
Camshaft lobe height (lift)
Compression Ratio - given
Displacement - given
EPC (Engine Performance Coefficient) - wut
Firing order
Fuel flow in gallons per hour - eh
Fuel flow in pounds per hour - eh
Fuel Injector pulse width - install injectors, do they work or not?
Fuel injector size - given
Fuel pressure - given
HP @ a given rpm - tuner's problem
MAP Readings* - tuner's problem
Mean Piston Speed - eh?
Oil capacity - given
Sea-level-standard-day atmospheric conditions: 14.7 lb/ in2, 15 °C (59 °F) - it runs or it doesnt
Specific gravity of gasoline: 0.71 - **** me sideways
Stroke - given
Swept Cylinder Volume - eh
Torque @ a given rpm - that is what a dyno sheet shows brah
Turbocharger A/R - given
Turbocharger wheel diameter
Turbocharger wheel trim
Vacuum created
Valve spring pressure
Volumetric Efficiency - wat
Weight of air: 0.0807 lbs per cubic foot -srsly?
Weight of gasoline: 6 lbs per gallon - k
Lets add to the list
% Oxygen in air: roughly 20.95% - wat
Airflow @ a given rpm - tuner's concern
Bore - - given
Brake Mean Effective Pressure - wat
Brake Specific Fuel Consumption - wat
BTU's per gallon of gasoline: 114,000 - i put gas in it....?
Camshaft advance angle -
Camshaft lift duration -
Camshaft lobe height (lift)
Compression Ratio - given
Displacement - given
EPC (Engine Performance Coefficient) - wut
Firing order
Fuel flow in gallons per hour - eh
Fuel flow in pounds per hour - eh
Fuel Injector pulse width - install injectors, do they work or not?
Fuel injector size - given
Fuel pressure - given
HP @ a given rpm - tuner's problem
MAP Readings* - tuner's problem
Mean Piston Speed - eh?
Oil capacity - given
Sea-level-standard-day atmospheric conditions: 14.7 lb/ in2, 15 °C (59 °F) - it runs or it doesnt
Specific gravity of gasoline: 0.71 - **** me sideways
Stroke - given
Swept Cylinder Volume - eh
Torque @ a given rpm - that is what a dyno sheet shows brah
Turbocharger A/R - given
Turbocharger wheel diameter
Turbocharger wheel trim
Vacuum created
Valve spring pressure
Volumetric Efficiency - wat
Weight of air: 0.0807 lbs per cubic foot -srsly?
Weight of gasoline: 6 lbs per gallon - k
Lets add to the list
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