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Engine attributes questions?

Discussion in 'Other Vehicle Discussions' started by rallyred04, Jul 5, 2005.

  1. rallyred04

    rallyred04 Junior Member

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    These questions come from a class I am currently taking. I figured this would be a good place to get some feedback. Thanks for your responses.

    What would you considered most important in an engine? Please list the following in the order of importance to you.
    1. Weight
    2. Volume
    3. Fuel Economy
    4. Reliability
    5. Durability
    6. Cost
    7. Noise and Vibration
    8. Performance
    9. Service Requirements


    Would you prefer more top speed or a lower 0 to 60?


    Have you ever blown an engine? If so, how did you do it? Were you racing, tuning, etc.?


    If you currently own a performace 4 cylinder engine:

    A. How satisfied are you with the fuel economy?

    1 = Too good! I would trade anything for more power.
    2 = Good enough.
    3 = Would like it to be better without sacrificing power.
    4 = Would like it to be better even if it means a little sacrifice in power.

    B. What is the current horsepower and fuel economy rating?

    C. What is your ideal horsepower and fuel economy rating?

    D. Is horsepower more important than torque?
     
  2. PhyRe

    PhyRe Senior Member

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    wow big question.

    1.cost(to much not worth it)

    2.reliability/durability(gotta last for it to be worth it)

    3.preformance(gotta have a reason to buy it)

    (weight, volume, service would be in with 3-4)

    4.fuel econ.

    5.noise

    now these are if i were the car maker not the buyer. but close if i were buying.

    i have a gsr b4 it was a d15pos and its got alot better 0-60 but screams top end and there are a few nice mile long strips you can blow down(and its my daily). but for a track car def 0-60

    nope. well technecly i did cuz i turned the key but it was fucked b4 i got to it. my boys car broke down and we went to "fix" it and it went pop not sure what it is yet. and my boy blew his by getting water sucked in threw his cai :(

    A: like i ssaid i have gsr good low end tq so if you keep it under 4400 gas is good and you can get around.

    B: you guestemate. its stock with a chipped ecu shortram and rsr straight pipe no ac no ps. dont knwo how much i loose from the tranny but i got maybe 10 more ponies than a stock one. and i have no clue what my mpg is cuz my tach is in km

    C: id say 200ish hp and 30 ish mpg would be good

    D: saw a quote that says it all, "Horsepower sells cars, Torque wins races."
     
  3. erikespo

    erikespo Senior Member

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    Well I had good reponses to everything but i lost it all.. to put it shortly..
    Reliability, Durability, Service Requirements come first
    Weight, Performance comes second with Performance being first
    Noise and Vibration, Fuel Economyand Cost are third depending on your key demographic
    Volume is dependant on the size of vehicle.

    0 - 60 is better while not sacrificing optimal ratios for lower 0 - 60 times.


    No I have never blown an engine.

    A:1
    B: 127HP factory rated - and 35 MPG with daily constant 7000 RPM revs
    C: I deally it would be a 10:1 weight to power ratio. so 2000lb car with 200 WHP that gets aleast 30MPG
    D: Horsepower is based on torque so no.. but actually horsepower is based on how fast a mine pony can pull a specific amount of weight a certain distance.
     
  4. Celerity

    Celerity Well-Known Member

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    1. 8. With a high performance motor, you'll experience a pleasant and confident operation at daily levels. No motor ever went "bad" from factory blueprinting and higher tolerances. It's a good thing all around.

    2. Lower 0-60. The torque matters in my daily world. Highway entrances, passing and even light-footed stop light launches are important to me.

    3. Blew engines racing and limping a known bad car home.

    4. I have 3 very different (performance) 4 cylinder motors, and they all perform dramatically different. the SOHC Toyota 4 cylinder is built for low-RPM driving and offroading. It performs it's job very well. I have a DOHC Honda motor for racing / high speeds. It gets incredible gas mileage (for what it is) and I have a Turbocharged Boxer motor and it guzzles gas, for what seems like not too much better than the other motors.

    A. SOHC 2.4 liter Toyota i-4: 1
    DOHC 1.8 liter Honda i-4: 1
    DOHC 2.0 liter Subaru Boxer: 3 (Who doesn't want more power at no cost?)

    B. SOHC 2.4 liter Toyota i-4: 205@3500 25-30 mpg
    DOHC 1.8 liter Honda i-4: 160@5250 30-38 mpg
    DOHC 2.0 liter Subaru Boxer: 220@something 15-20 mpg (UGH)

    C. SOHC 2.4 liter Toyota i-4: 230 30 consistent mpg
    DOHC 1.8 liter Honda i-4: 220 30-38 mpg (pretty damned happy)
    DOHC 2.0 liter Subaru Boxer: Same 22-28mpg

    Without Torque, there is no horsepower. When an engine rates a higher torque than HP, life is good. Also, low-RPM is my preferred behavior
     
  5. Celerity

    Celerity Well-Known Member

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    I can totally agree with this statement. When a car is lightweight, the amount of room engineers have to build a highly efficient motor with relatively low power increases. Lightweight wheels, brakes, flywheel and axles go a long way to releasing that power. That's why the more intelligent of us are seeing both power and mileage gains - Keep it light weight and keep the motor in it's prime power curve.

    -> S
     
  6. Battle Pope

    Battle Pope New Member

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    First off, I don't own a 4-cylinder anymore, so I'll answer based on my 8-cylinder engine and my old 4-cylinder as well.

     
  7. Celerity

    Celerity Well-Known Member

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    Look at us all on a Honda forum talking about how much we love torque :)

    -> Steve
     
  8. Battle Pope

    Battle Pope New Member

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    Yeah, it's almost like dangling a twinkie in front of the fat kid's face while he runs.. :lol:
     
  9. PhyRe

    PhyRe Senior Member

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    lol yeah thats what i was thinkin when i posted the first oone
     
  10. NissanNiNjA2nd

    NissanNiNjA2nd Senior Member

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