What do you guys think about this cold air intake?

[Wdhitch]

Originally Posted by BARNEY O

WDHITCH, would you please give me thread and post where that was tested or said?

Where what was tested??? You're talking in circles....

Common sense and 2 brain cells says that the tube will be dry for the most part. If you look at the tube and examine the interior it's dry... My point was that if you have any signifigant fluid in that tube then where it flows into the intake is the least of your problems.

Also, if you look at the big picture... and again use common sense and have any basic knowledge of the engine compartment... you would realize that the entire compartment heats up to somewhere around 160 degrees so no matter where you have the small amount of air coming into the intake, it's so miniscule it DOESN'T MATTER WHERE YOU PUT IT!! (hoping the caps drive home the point... I get tired of stating the obvious.)

[jetfuel]

.....OH OH...

jetfuel...

[BARNEY O]

WDHITCH, I will try to make this as perfectly staight as I can.

1st. It has been proven that there is vacuum inside the engine vent hose during part throttle operation.
Let me walk you thru this,since your a common sense guy like me. If you are trying to get as much water thru a hose to put out a fire would you want another hose connected to your hose sucking some of your precious water away? Don't think so!
2nd. Under wide open throttle you will lose this vacuum. Which case crankcase pressure will come up. Depending on condition of your engine you could get a variety of by products and one thing for sure, HOT AIR!
Now, if you think inducing hot air in front of throttle body is cool your sadly mistaken.
As I said before the manufacturer has different criteria to follow and the position where they made the connection for the vent hose best suited emission standards and probably helped increase mileage by allowing that hot air to be recycled.(hot air requires less fuel, more MPG's)
Lastly I proved this all back in the 70's on my dyno when I would take away the vent hose running from PCV valve to carb base.

I can't make it any simpler! I thought this was about performance gains?

Barney O...... no circles here.

[Wdhitch]

But your whole argument is moot.... because the amount of air your referring to is hardly a factor when talking about the total amount of air being moved... The location of the hose isn't going to make a difference.

[BARNEY O]

Originally Posted by Wdhitch

But your whole argument is moot.... because the amount of air your referring to is hardly a factor when talking about the total amount of air being moved... The location of the hose isn't going to make a difference.

obviously we disagree so I will leave it at that.

Barney O.... no caps needed

[Smart Enuf]

Can't we all just get a long...hose?

[Wdhitch]

Originally Posted by Smart Enuf

Can't we all just get a long...hose?

Nice.

[TMACK]

Look, I don’t want to cloud the issue any more than it has been, but it seems to me the vent hose was placed next to the throttle body for a reason. The German designer could have placed that hose anywhere along the filtered intake train. This purposeful placement denotes intelligent design, and German automotive engineers are anything but design dullards, (although that latest Porsche post could prove me wrong).

But on another level, BarneyO, I am now confused.

“Depending on condition of your engine you could get a variety of by products and one thing for sure, HOT AIR!
Now, if you think inducing hot air in front of throttle body is cool you are sadly mistaken.
As I said before the manufacturer has different criteria to follow and the position where they made the connection for the vent hose best suited emission standards and probably helped increase mileage by allowing that hot air to be recycled.(hot air requires less fuel, more MPG's)”

I thought cold air intake was desirable for both performance AND gas millage, that the more dense the air, the more is present in the combustion chamber for better burn.

Or am I wrong that cold air is denser? Or am I also wrong that dense air betters performance? And if that is so, why are “cold air” intakes so in vogue?
Oh yeah: not trying to be snarky or snide with this post, just your above statement is confusing to me.

[IH8OPEC]

Originally Posted by TMACK

Look, I don’t want to cloud the issue any more than it has been, but it seems to me the vent hose was placed next to the throttle body for a reason. The German designer could have placed that hose anywhere along the filtered intake train. This purposeful placement denotes intelligent design, and German automotive engineers are anything but design dullards, (although that latest Porsche post could prove me wrong).

I thought cold air intake was desirable for both performance AND gas millage, that the more dense the air, the more is present in the combustion chamber for better burn.

Or am I wrong that cold air is denser? Or am I also wrong that dense air betters performance? And if that is so, why are “cold air” intakes so in vogue?
Oh yeah: not trying to be snarky or snide with this post, just your above statement is confusing to me.

You’re correct cold air is denser, meaning its oxygen to fuel ratio is higher per cc than hot air. But cold dense air is a rich mixture, which doesn’t improve MPGs but does improve power because of the extra oxygen and fuel being crammed into the combustion chamber.


Less dense, warm to hot air has a lower oxygen to fuel ratio (lean mixture) which improves MPGs but also increases the chance for damage to the pistons and cylinder head from detonation if uncontrolled and is one of the primary reasons premium fuel is required for our Smarts, it has an extra additive to increase the octane level to help prevent detonation of the leaner hotter mixture, now if your ECU and related sensors are working correctly detonation will be either eliminated or held to a minimum.

Now to the crankcase breather tube, the power train engineers had to make a compromise on its location. It’s location suggests it's being used as a sort of scavenge/venturi type PCV system during wide open throttle and its current location is debatable IMO without data.

On a side not: I’d personally like all of these companies producing a so called “CAI” to at least have dyno info to back up their claims but I haven’t seen any yet, I can guarantee none of these companies have the instrumentation installed to give any real data to support their claims so to me they’re not worth the price being charged. The first one (company) that has a valid CARB number will be the first one that I’ll buy since they’ve proven their work and aren’t out to make a quick buck from the less informed!

There are two things that can be done if you’ve decided to install a current “CAI”: place a small filter on the end of the PCV breather tube or leave it where it’s at. Since without hard data it makes no difference really!

[BARNEY O]

Tmack, I believe Ih8opec has answered your question. Also Jetfuel gave insight to this in post #33 in this thread.

Barney