Calculadora de Performance para Motores

[Passos]

São basicamente pra arrancada, mas acho que ajudam bastante em vários assuntos que ás vezes ficamos na dúvida de como calcular...

A merda é ser tudo em sistema imperial (polegadas) mas o amigo aqui também já pensou nisso:

converta cm x pol: http://www.tech-faq.com/lang/pt/convert-ce...to-inches.shtml
converta pol x cm: http://www.tech-faq.com/lang/pt/convert-in...ntimeters.shtml

Parte 1:

Fuel Pump Capacity Versus Horsepower
This calculator is useful for calculating the fuel pump flow capacity you will need to support a given horsepower.

Fuel Injector Sizing Versus Horsepower
This calculator is useful for calculating the maximum horsepower that can be supported by a given fuel injector size.

Evenly Spaced Transmission Gears for Off-the-line Gearing and Rear End Ratio
This calculator is for manual transmission cars and is useful for calculating evenly spaced transmission ratios based on desired off-the-line gearing and rear end gear ratio.  The term evenly spaced means that the engine RPM will drop by a fixed amount on each gear shift thereby keeping the engine in a specific RPM range.

Horsepower, Weight, Shift Points, Gears and Tires
This calculator is for manual transmission cars and is useful for calculating the relationship between horsepower, weight, shift points, transmission ratios, rear end ratios and tire sizes.  Use this calculator if you know your horsepower, desired shift points, minimum RPM points and tire diameter pretty well and you want to calculate the gear ratios required to make the engine stay in its' power band.

RPM for Speed In Gear
Use this calculator to calculate the relationship between rear end gear ratio, transmission gear ratio, tire diameter, vehicle speed and engine rpm.

Speed for RPM In Gear
This calculator is similar to the calculator above.

Calculate Horsepower from Known Performance and Weight
Use the form below to calculate your cars estimated peak engine horsepower from current performance and weight.  You can also use it to calculate how much horsepower you will need to get your car to a given performance level.

Calculate Performance from Known Horsepower and Weight:
Use the form below to calculate your cars estimated performance from known horsepower and weight.

Calculate Minimum ET From Known MPH
Use the form below to calculate your cars best estimated ET based on maximum MPH.  After you have calculated a result, if you would like to see a curve that shows minimum ET for a given maximum MPH select "Plot It".[/url]



Parte 2:

Basic Horsepower Versus Altitude
This is a basic calculator that is useful for calculating the effects of elev1 (altitude) change on engine horsepower production.  This calculator is specifically intended for use in calculating numbers for naturally aspirated cars.

Maximum Piston Speed and Acceleration
The following calculator can be used to calculate the piston speed and acceleration for a given combination.  Use this calculator to verify critical engine parameters for your combination.  The second column of inputs is so that you can compare two combinations "side-by-side".

Engine Displacement
The following calculator can be used to calculate the displacement, or swept volume, of an engine.

Engine Mechanical Compression Ratio
Use this calculator to calculate the mechanical compression ratio for an engine as well as the total displacement of each engine cylinder.

Minimum Intake Port Cross Sectional Area
The following calculator can be used to calculate the minimum intake port cross sectional area for a given engine.

Header Dimensions
The following calculator can be used to calculate the header dimensions best suited to your combination.

Intake Air Flow Requirement
The following calculator can be used to calculate the intake air flow requirement for your combination.[/url]


Divirtam-se!


Retirado do NDARacing.com

[romulo325]

E ai passos beleza?
O que você acha de aumentar a taxa da 325 e continuar usando a gasolina?
Qual é a taxa máxima que posso usar, sem mexer na alimentação?
Eu vou ter que retificar o motor da minha, o cilindro está muito gasto, acho que os outros donos negligenciaram muito ela. Já abusando, você teria a tabela de torques para o 2,5? Um abraço!

rômulo

[Passos]

romulo, a taxa varia muito.... voce pode taxar bastante, mas tendo que mudar o ponto.... seu carro tem knock sensor, nao tem? se tiver, vc pode por 13 de taxa na gasolina, que ele vai atrasar o ponto de tal forma que o carro nao vai dar detonacao, mas tb nao vai trazer rendimento nenhum.....

se quer taxar na retifica, pq ja nao utilizar alcool de uma vez? ai vc poe uns 12,5:1.... agora na gasolina, acho que passar de 11:1 eh muito ja, e lembrando de usar uma gasolina do tipo podium....

[romulo325]

E ai véio beleza?

     Só abusando um pouco, você teria a tabela de torques para esse motor.
Para passar  a alcool, é melhor aumentar a vazão dos bicos ou remapear a injeção?
Acho que vou precisar também acertar o VANOS.

Um abraço, e obrigado pelas dicas!

[Abreu]

mais uma calculadora... taxa de compressão!!!

http://www.zealautowerks.com/

[135ick]

O mais completo site de calculadores que conheço é esse: http://www.wallaceracing.com/Calculators.htm