Better mileage of KA, SR, CA

[tendim]

Hi.

Does anybody know which would be better for mileage? How do factors such as displacement, and turbo (lack of, size) come into play?

It is my naive understanding that lower displacement = less gas consumption, and that turbos increase performance, giving you more bang for the buck. So a low displacement turbo engine should be best?

Cheers,10d

[Structure240sx]

all depends on the engine. a small displacement turbo will still consume a decent amount of fuel if u drive it hard, higher revs because it will be making boost and adding more fuel. any engine will use more gas the harder your on it.

[Mikel]

Power = burned fuel. No matter what you do, it takes XX amount of fuel to make XXX hp.

[I am Technoman]

:oface I want 400HP 35 MPG and I want to be able to drift the whole 1/4 mile sideways In 10:002

[7thGear]

and i want my whole car made from titanium, but it aint gonna happen is it?

[nlzmo400r]

hmmmm, call NASA, they might be able to give you that titanuim stuff, maybe not enough for a whole car, but for a wheel atleast, or maybe jsut a leg, if u need one

[tendim]

all depends on the engine. a small displacement turbo will still consume a decent amount of fuel if u drive it hard, higher revs because it will be making boost and adding more fuel. any engine will use more gas the harder your on it.

Yeah, that I figured, just from driving my KA around. However, all things being equal. I hardly ever break 3.5k only because I don't want to spend too much $$$$ on gas (bloody expensive lately). But if I were to drive the CA, SR and KA under identicle (or as close to identicle as I could) conditions, i.e., shifting @ 3k, never breaking 3.5k, averaging 2.5k for my RPM's, which would win out?

-10d

[TomsMR2]

you're worried about the gas mileage on your KA, and you're thinking about a high output turbo motor? lol.

[spec-v5150]

you're worried about the gas mileage on your KA, and you're thinking about a high output turbo motor? lol.

I second that

[tendim]

you're worried about the gas mileage on your KA, and you're thinking about a high output turbo motor? lol.

No, I'm worried about the gas mileage on my KA now because I'm a poor student who spends all of his $$$ on tuition b/c the stupid Canadian government deregulated my program, so the university can charge whatever they want.. For the price of a non-deregulated program, I could have installed two SR20's by now.

Moving on. The question about mileage was just to satisfy my own curiosity.. Turbo's give an engine "more power for nothing" since you are reusing exhaust to compress incoming air, right? So if you're getting this "free power" on a small displacement engine, doesn't that mean that you'll end up using less fuel in the long run??

[SHiFT]

Well if you never go beyond 3.5 in the ka right now would probably be the best gas mileage. 22-28 the ka gets, I say just stick with what you have, the other engines will most likely get worse than that.

[TomsMR2]

Moving on. The question about mileage was just to satisfy my own curiosity.. Turbo's give an engine "more power for nothing" since you are reusing exhaust to compress incoming air, right? So if you're getting this "free power" on a small displacement engine, doesn't that mean that you'll end up using less fuel in the long run??

power = air + fuel. the turbo provides air, using energy that would have been wasted... so you're getting free air essentially. to make power, the extra air has to be met with extra gas. so no, you arent getting free power, you have to dump alot of fuel in too.