Deckplate Mod vs. K&N Cold Air

M

marcelluke

New member
I'm moving on to the next mod for my 4runner and I want to increase air flow. At first I was only considering to buy a cold air intake, but now am I considering just buying a dry flow intake and coupling that with a deck plate mod. Are there any performance gains that I will be missing out on? I know that I'm not going to see any dramatic increases in power but if its anything that will help out my truck while not killing my highway mileage, then I'm all for it.

Also, while we're on the subject of me modding my car--I've been looking into brake upgrades. Have any of you done any brake mods that you've really liked?
 
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marcelluke said:
I'm moving on to the next mod for my 4runner and I want to increase air flow. At first I was only considering to buy a cold air intake, but now am I considering just buying a dry flow intake and coupling that with a deck plate mod. Are there any performance gains that I will be missing out on? I know that I'm not going to see any dramatic increases in power but if its anything that will help out my truck while not killing my highway mileage, then I'm all for it.

Also, while we're on the subject of me modding my car--I've been looking into brake upgrades. Have any of you done any brake mods that you've really liked?
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ive done both the deckplate and ISR mods. they both give a noticable increase in power. without the $250. i guess you are missin out on the extreme high flow of the k&n. but then again if you go through mud/or a big puddle you just have an open air filter. id just go with the under $20 options.
 
What is the difference between an ISR Mod and a Deckplate Mod? The K&N dry flow filter is supposed to be "virtually unrestricted airflow" with the downside that you do not get cold air, but if i do that with a deck plate mod i feel like i'll be getting the best of both worlds for 80 bucks and I won't even have to oil my air filter.
 
marcelluke said:
What is the difference between an ISR Mod and a Deckplate Mod? The K&N dry flow filter is supposed to be "virtually unrestricted airflow" with the downside that you do not get cold air, but if i do that with a deck plate mod i feel like i'll be getting the best of both worlds for 80 bucks and I won't even have to oil my air filter.
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The deckplate is the whole in the airbox. The ISR mod or intake silencer removal takes off the big black plastic box on the intake tube. making it more of a straight shot.
What year is your 4runner??
here is a write up about it: Intake Silencer Removal Mod - 3rd Gen 4Runner (2000) - YotaTech Forums
 
Thanks SantaCruz! very helpful :)

thor999 said:
One consideration: the oil from the filter WILL wreak havoc on you MAS!
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Are you referring to the oil used in a cold air intake by a company like K&N? Can you explain that a little better, i'm not to familiar with how all of that works
 
It is my understanding that any filter that requires oiling will eventually gum up your MAS, causing CEL and loss of performance, no matter how careful and conservative you are with the oil. I know I got a CEL within weeks of installing an oiled filter, replaced with OEM and cleaned MAS, and didn't get another code until my O2 sensor died.
 
Been there, done that.

I had a deck plate, drop in K&N filter and a Airaid ISR tube. I have patched/sealed the deckplate hole, put the factory tubes back in and thrown away my oil type filter. Back to paper and doing great.

IF you go with an oil type filter "oil sparingly!!!" Too much oil and it WILL be sucked thru and gum up the whole intake. I had to remove everything and degrease it.

It's all bunk. A clean paper (non-oil) filter will do more than all of the rest. Both the CAI and ISR will increase the intake drone that can drive some out of their minds (me when driving up the mountain passes).
 
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Gerdo said:
Been there, done that.

It's all bunk. A clean paper (non-oil) filter will do more than all of the rest. Both the CAI and ISR will increase the intake drone that can drive some out of their minds (me when driving up the mountain passes).
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Agreed....I hate the freaking intake noise. I have done the ISR and am running a non-oiled, but reusable (cleanable) air filter. I couldn't be happier.
 
This has worked great for me the last few months - a straight shot intake tube modified to fit into the stock airbox. Nice, quiet, unrestrictive and snorkel friendly.
 

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thor999 said:
It is my understanding that any filter that requires oiling will eventually gum up your MAS, causing CEL and loss of performance, no matter how careful and conservative you are with the oil. I know I got a CEL within weeks of installing an oiled filter, replaced with OEM and cleaned MAS, and didn't get another code until my O2 sensor died.
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The statement above is not accurate. Your truck will only throw a CEL if you put WAY too much oil on the filter. I have driven with a K&N CAI for more than 5 years and re-oiled it many times. It has never thrown a CEL or messed with my MAF.

After you oil the filter use a damp rag to soak up any extra oil beads on the filter before installing.

.
 
That's HP though. How much MPG difference does it give?
I know I put one on my Yukon XL 2500 and got about 1.5 mpg more. And another 2 mpg with a magnaflow exhaust.
 
Exactly right. If toyota engineers knew the K&N works best, they would have used it. I always buy OEM TOYOTA Air filters from the dealer and so far satisfied. My cousin has a 07 Lexus Es350. He used K & N. Before his MAF got jammed with oil, I instructed him to go back to OEM filter.
 
I've had a CAI on my 98 for a bunch of years. It helped the anemic 2.7 engine out. You have to be realistic when re-oiling it, otherwise you'll have MAF problems. I was wondering if there was a non-oiled filter to replace the K&N one with on the CAI.

And as for the noise, it ain't that bad. Like I said, it did help the 2.7 out.
 
Oh, I forgot. I did buy the CAI before I knew about this (and other) awesome Toyota forums. I'm not sure if I would have done anything different. The biggest downfall is the price, rather than the noise or other performance concerns. My truck does not pass through any rivers or standing water, and I would only really have to deal with stuff like that if it ever snowed again here in DE.
 
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