So im looking to get a cold air intake i know K&n's Product, but how is TRD.
And why does TRD have that chrome box and K&n doesnt. Which is a good one to go by,

which one do you have?

 

what truck this going on ?

 

If you want the coldest air for the cheapest price...
Keep it stock. Upgrade the filter element if you really find it
necessary, but those short ram deals all just take in air from the engine bay
which is much hotter than whats coming in through the headlight,
like with the stock location

 

That's right. Any modern vehicle already has a cold air intake.

A while back I went to do the service my Tacoma, and after I had already bought a Purolator filter and started the service, I found out that the previous owner had already installed a K&N. There were a couple of things I noticed.

First, when held up to the sunlight, the K&N had pinholes in it, while the Purolator did not. I've had 2 K&Ns in the past, and they were the same way.

Another thing I noticed is that the Purolator's pleats were about twice as deep. The K&N did have a few more pleats, but certainly not enough to add enough surface area to make up for the deeper pleats of the K&N.

My guess is that despite the increased flow capability caused by a media that doesn't filter as well, plus a few more pleats, the flow capability of the K&N would be about the same as the Purolator with it's deeper pleats.

I installed the Purolator and noticed absolutely no decrease in power. And in the past, when I added the K&Ns to the other 2 vehicles I owned, there was no increase in power.

If the greatest flow restriction isn't in the filter, the filter won't add power. For instance, if the flow is limited to 500 CFM elsewhere and you have a filter that can flow 600 CFM, the maximum flow is still 500 CFM. Why? Because the flow at any given time is the same throughout the whole intake.

Not only that, but the most restrictive part may not be in the intake. It could be the heads (very common), or the exhaust.

And another thing: If the vehicle isn't at full throttle, the throttle plate is the most restrictive part. It controls engine speed and power output by controlling air flow.

So if you are at half throttle and the throttle plate is restricting air flow to 250 CFM and you have a filter that will flow 600 CFM, the flow is still 250 CFM.

Any possible gains in power that an intake or aftermarket filter would give would be at or near full throttle with the engine at or near redline, which is when the engine is pumping the most air.

 

I had a K&N CAI on my '05 for about 6 months. Oily crap was getting on my MAF. Sold it for about what I paid for it new...

You might think you feel more power (butt dyno) IMO it just sounds loud in the cab.

Do a search, some one took intake temperature measurements and from what I remember the AM intakes were running hotter...

 

Thanks for the info, Very interesting

Its going on my 08 Tacoma TRD SPORT

 

volant makes some nice ones too

 

If you can on your truck install a deckplate. Cheapest best mod possible, direct air into the box and you can close it up and return it to the stock intake for wheeling. When i put a deckplate on mine and removed the ISR i could notice less top end leanout (sustains power curve longer) and it makes a pleasant noise under WOT but sounds normal at idle.

 

get a snorkle

 

This will be for looks only, BTW, unless you are running a supercharger.

CAI or exhaust does NOTHING on an NA engine.