jim beam <nospam@example.net> wrote in
news:OuqdnUjFs9QaPAXZnZ2dnUVZ_q6dnZ2d@speakeasy.ne t:

> Jim Yanik wrote:
>> jim beam <nospam@example.net> wrote in
>> news:lrWdnX4uvr91awrZnZ2dnUVZ_sudnZ2d@speakeasy.ne t:
>>
>>
>>>TE Chea wrote:
>>><snip>
>>>
>>>you need to stop drinking the "cold air intake" coolaid there guy.
>>>it may be fine for you kidz in the nice warm county of l.a. to run
>>>about with disabled de-icing equipment, but anywhere else in the
>>>country, it becomes a bit of an issue when your car sputters to a
>>>halt because of ice buildup.
>>>
>>>as an aside, i had my air intake cover off the other day, and forgot
>>>to screw it on tightly. the screws worked their way out after a few
>>>hundred miles, and the air intake cover popped off. it was
>>>noticeable by two things:
>>>
>>>1. increased noise. ok, ho hum.
>>>
>>>2. big /decrease/ in power. the "ultimate" cold air intake, i.e. no
>>>intake at all produces /less/ power???!!! yep, you better believe
>>>it.
>>
>>
>> Uh,the air intake is still from the hot under-hood air.All you did
>> was shorten the intake runner length,which reduces torque.
>> If you don't believe cold air enables more power,then explain why
>> racers put scoops and ducts on their race cars.It wouldn't make
>> sense,adding more drag to get cold air that doesn't produce more
>> power.
>
> uh, i understand how it works thanks. what i'm saying is that it's
> not so simple as most of the "cai" crowd believes. if the intake
> tubing is tuned correctly, i.e. resonances are set specifically, it
> enhances the air charge entering the engine. done right, it
> flattens/broadens power/torque curves. otherwise you're stuck with
> huge flat spots in the engine's performance, exactly what i was
> experiencing.
>
> "tuning" the air charge has /way/ more effect than the minor density
> differences made by a few degrees of ambient air temperature.
>
>>
>>>now, it's possible that some aftermarket manufacturers of air intakes
>>>know what they're doing and understand airflow resonance dynamics and
>>>the effect it has on engine air induction, but somehow i doubt most
>>>of them do. but hey, most of this stuff is not for performance, it's
>>>just for show...
>>>
>>
>>
>>
>>
>

If Honda Tuning Magazine still has the article,they did flow bench and dyno
tests on an RSX for several different brands of short rams and two cold air
intakes.They did a reference test on the unaltered vehicle,then tested each
intake system.Both CAIs got 20HP and modest torque increases.The short rams
only got 5-7 HP gains. They included their graphs in the magazine
article.They also discussed the effect of intake air temperature WRT making
power.

It was a very informative article.Maybe you can get a back issue.

--
Jim Yanik
jyanik
at
kua.net