Air box interchnage& performance upgrades

[tandt14]

I can't figure out the Cruiser's variation in gas mileage to save my life. One week I'll get 22 mpg, the next week I'll get 19 mpg. Same driving habits--same commute. I was beginning to think that I was crazy. I recently started using fuelly.com so that I can track my MPG and keep up with which gas stations that I visit. I have started to notice that when I get gas at one particular gas station, I get worse gas mileage. Maybe I'm not crazy after all.

[Duster]

I'm with Crewzin on this too.


Sorry guys but as far as I'm concerned there's nothing else than a Turbo or a Supercharger to increase the density of air into the fuel/air mixture for a better combustion, so more power OR better MPG.

And we are really talking about increasing the air PRESSURE, not just the velocity. In an athmospheric based system, velocity has nothing to do with the amount of air you can mix with gas.

A closed-circuit where the pressure can be built up before being mixed with gas is another story...obviously. It's exactly why turbo and supercharger exist.


As long as there's nothing to block/restrict air like a low quality or dirty air filter, as long as the air going to the system isn't too hot (density again...), as long as the "plumbing" isn't too small, I can't see what we could do to increase this in a N/A motor.


Like Wikipedia likes to say:

A naturally-aspirated engine (N/A) is a reciprocating internal combustion engine that depends solely on atmospheric pressure to draw in combustion air. This is in contrast to a forced induction engine, in which a mechanical or exhaust-driven blower is employed to increase the volume of intake air beyond what could be produced by atmospheric pressure alone.



It's not a whistling/twisting/anything else-ing little thing that will change these physics concepts.


Or I was wrong all my life long.

[warped]

Originally Posted by CREWZIN

OK, believe what you want but even when the manufacture says any improvements can't be measured when pressed for dyno results, than that should say volumes. They can say all they want in the product write-up, proving it is something else.

I guess if your happy with the results, and the manufacturer is happy that you bought their product, then that's all that counts. Have a good one.

Now Crewzin you always give me crap for picking on people!!!!

[allhale09]

I agree that sometimes Crewzin' does seem like he's talking down to us but he does always have good answers when we have problems so I think it equals out.lol
But back to the spacer..
Why would it being on a carb make it it any different that on a throttlebody

[warped]

Im just Messin with crewzin!!!!!

[CREWZIN]

Originally Posted by allhale09

Why would it being on a carb make it it any different that on a throttle body

I'm no expert on this and Duster did a good job of explaining why he agrees with me but the way I look at it and understand it, when you have the spacer under a carb, the air and fuel go through and are mixed up in a way to "disturb the air in such a way so that the fuel would form smaller droplets and better atomization would take place" ...according to one of the write-ups.

On our engines only air is passing through the (TB) Throttle Body. There's 4 runners and lots of feet of intake before that air mixes with the fuel from the injectors. The spacer isn't any larger than the TB so there's no increase in air flow. See Duster's posting for the rest of the story.

Hey Mike, wanna jump in here s an expert?

[Mean Green]

At times CREWZIN can be blunt and I like that. So many times you hear wishy washy answers that just follow the flow when the answers are so wrong it's beyond funny. If an ego gets bruised along the way oh well, suck it up and don't be such a lighweight. Keep it up CREWZIN and take no prisoners.

[Dracosky]

the spacers work on all motors and fuel systems "in theory'' by like earlier said creating turbulence in the intake manifold to even out the way fuel mixes with the air and is designed to ensure that a equal fuel air mixture to each cylinder most stock systems mix the fuel well enough to get good performance but the mixture ends up being different for each cylinder the closer to equal in each cylinder the more efficient the combustion process. however i feel that in the pt that the design already creates a even and equal mixture to the cylinders

[chris15]

I'm not so sure that it has much to do with the mixture in the cylinders, as that's the job of the PCM to coordinate fuel mixtures with air flow and I don't personally feel that a spacer has much do with appropriating an "equal mixture".

The reason why a carb spacer works and provides a noticable improvement is simply because it increases the distance from the bottom of the carb to the floor of the intake, thus increasing the amount of air that can be crammed into the intake plenum .. It has nothing to do with creating a 'vortex' or anything of that nature. Then you're talking about forced induction, and a carb/throttle body spacer has absolutely nothing on a turbo/supercharger.

So, yeah, Crewzin is very correct when he says that a throttle body spacer doesn't do much. In essence the only thing it does is extend the path that air travels into the motor.. give me a theory behind that that isn't based on pure nonsense like "IT FEELS FASTER!" and I'll take your viewpoint into consideration.

[Samson]

mean green I doubt you would hold that opinion if you were flamed.
Peace