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CAI a total sham??? Per Toyota service tech...

Discussion in 'Performance and Tuning' started by ::childstoy::, Aug 14, 2010.

  1. Aug 14, 2010 at 1:53 PM
    #1
    ::childstoy::

    ::childstoy:: [OP] Hi-Tech Rednek

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    I was talking to a friend of mine who I trust his word on this topic since he's been a Toyota service guy for around 10 years. I was talking to him yesterday about my new exhaust and potentially getting an intake. I've read alot of debate on here regarding the whole HP increase from a CAI, seams everyone is 6 on one side a half dozen on the other.

    In his words he says- "Cold Air Intakes are pure bullshit on Tacomas." He said it already is if you consider it draws the air from the fender and not from under the hood. He states that he has seen NO difference in HP on a Dyno after the install of one and that I'm just wasting my $$$ if I buy one.

    I asked him would it help if one was installed with an exhaust also... He said no way.

    Is this true???
     
  2. Aug 14, 2010 at 2:11 PM
    #2
    mreimann

    mreimann vv I think it's growing

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    thats understandable for the TRD intake. all it really does is just move the filter closer to the fender.

    look into URD. it moves the intake in front of the radiator. now it's getting air from the front of the truck, not from inside the fender/engine bay
     
  3. Aug 14, 2010 at 2:23 PM
    #3
    ::childstoy::

    ::childstoy:: [OP] Hi-Tech Rednek

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    Even so isnt everything just being restricted by the CATs then? That was basically by buddies point was no mater what intake or exhaust you put on the CAT will always hold you back.
     
  4. Aug 14, 2010 at 2:35 PM
    #4
    m3zy6

    m3zy6 Well-Known Member

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    Eh, think of it from a fluid dynamics point of view. Yes the cat is always going to restrict flow, but if it is the only thing in the system doing the restricting then there will still be more flow, right?
    Think about blowing water through a straw. The harder you blow the more water goes through the straw.
    If the only restriction in the airflow is the cat, then the high pressure built up in front of it will force more air through it.

    Unless I'm totally wrong. Im not a physicist, but I did stay at a Holiday Inn Express last night...
     
  5. Aug 14, 2010 at 3:03 PM
    #5
    OH-MAN

    OH-MAN Well-Known Member

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    I like the sound of power!!!!
    It may not add any but it sounds cool;)
     
  6. Aug 14, 2010 at 3:08 PM
    #6
    whippersnapper02

    whippersnapper02 Well-Known Member

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    I'm sorry but modern cats aren't all the restrictive anymore. Yes you gain some power when removed but sometimes at the loss of low end power because of the reduced back pressure that promotes exhaust scavenging. The reason an intake doesn't really work is because the engine can only take in so much air at a time. Yes you make it a bit easier to breath but it is still the same amount of air going in. Add a blower or mess with the heads and then you will see more air flow being pulled in. But yes the stock intake is cold air as said 527358954738904273 times on TW. K&N, AFE non stage 2, AEM and Injen intakes are not cold air intakes.
     
  7. Aug 14, 2010 at 3:08 PM
    #7
    jrws6

    jrws6 Well-Known Member

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    My K&N CAI picked me 1-2 mpg's in my 6 speed...
    and that is with me driving it heavier these first two tanks.

    Plus it sounds awesome, awesome is really an understatement wicked is more appropiate....
     
  8. Aug 14, 2010 at 3:11 PM
    #8
    goblue64

    goblue64 Active Member

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    :D Haha classic!

    I have a k&n and all it really has done is given the motor and exhaust a real nice rumble and a lil better throttle response I wouldn't say the truck is faster. Is it waist of money?? Ehhh for me no cause im happy with it. As soon as I get home from this hell hole I will be getting the urd kit though. There's so much information in this forum about the cai its crazy. So if you want some more muscle sound go with it. If you want more muscle then supercharger FTW!
     
  9. Aug 14, 2010 at 4:55 PM
    #9
    Super Werty

    Super Werty Sleeper 4x4

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    air and fuel
    It has been proven time and time again at the 1/4 mile on the X-Runner and Tacoma that removing the cats and adding an intake will improve your trap speeds.

    Trap speed = power/weight ratio

    On boosted set ups, a full race exhuast (long tubes, Y pipe, 3: catback) is showing around 45rwhp gains.

    Tell your mechanic friend to go back to school. And dont let him install your parts either.:p;)
     
  10. Aug 14, 2010 at 7:44 PM
    #10
    XrunnIT

    XrunnIT Well-Known Member

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    I find that the most service techs are about as smart as a box of rocks when it comes to performance. Most of them (not all) are only good at changing break pads and oil filters, and have no knowledge about the engineering behind most aftermarket parts.

    People say cold air intake, and all they hear/think is "oh, cold air". That is a very tiny detail when it comes to properly engineered intakes. Air flow is much more important then 10°F. Reducing turbulence using a velocity stack, high flow filters, and MAF accuracy are all much more important then if its colder then stock or not.

    And at the same time, not all vehicles are the same, nor do they respond the same. You can have the same intake on 10 cars, and 6 of them see a gain, 3 see no gain, and 1 sees a loss in power. Who's word do you trust? they all have first had experience?
     
  11. Aug 14, 2010 at 7:56 PM
    #11
    Bobo_1

    Bobo_1 Well-Known Member

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    Everyone one has an opinion just like an ahole. What amazes me about this forum and other Tacoma ones, is nothing seems to be backed by dynos. My GM LS1 forums, and my motorcycle forums, all back everything by the dyno. In fairness, I don't think the truck owner is the same. And as a truck owner I really don't care exactly how much of an improvement I will get since I am not out for dyno bragging rights or the time slip at the track. I just to feel it at my SOP.

    I am surprise that I have yet to see any vendor dyno shoot out. I really don't know if CAI and exhaust are going to increase dyno numbers. Since I have been doing this for quite a while on street cars, a couple of drag race cars, and several bikes, I put my money on it affecting the dyno numbers and my SOP. Will it have the same hp per dollar ratio that I get from changes to an GM LS1 or a 45 degree twin, I don't think it will. But, will I do it anyway because I know improving the breathing and exhaling work? Hell yes.

    Someone really needs to have a shoot out and put the CAI and Exhaust question to rest.
     
  12. Aug 14, 2010 at 7:59 PM
    #12
    schiz94

    schiz94 Thread Jacker

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    i believe this guy
     
  13. Aug 14, 2010 at 8:01 PM
    #13
    HondaGM

    HondaGM Roll Tide

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    there has been alot of butt dyno tests
     
  14. Aug 14, 2010 at 8:15 PM
    #14
    ktmrider

    ktmrider Senior Member

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    I am actually a professional butt dyno and I didnt feel any difference switching from a AEM "CAI" to the AFE stage II on my boosted set up.
     
  15. Aug 14, 2010 at 8:51 PM
    #15
    Amo-cat3

    Amo-cat3 Wizard Sleeve Master

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  16. Aug 14, 2010 at 9:40 PM
    #16
    numbah57

    numbah57 BORN AND RAISED MAUI BOY

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    Hahaha, The same kind of toyota service tech that gave my friends camry back with the oil drain screw half way out, No more camry.
     
  17. Aug 14, 2010 at 9:51 PM
    #17
    chris4x4

    chris4x4 With sufficient thrust, pigs fly just fine. Thor

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    FlimFlubberJAM
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    There have been dynos on these and other mods before. People have posted their results. Not all on this forum, but others too.
     
  18. Aug 14, 2010 at 10:17 PM
    #18
    OH-MAN

    OH-MAN Well-Known Member

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    If I had free dyno time I would do it but the dyno time I have paid for in the past on other modified trucks is not cheap.
    So making two pulls and the time between waiting for me to swap intakes is going to cost more than the intake.

    I know that they adjust for conditions but the error % is more than enough to cancel out a 3 or 4 H.P. gain or loss.

    If the factory intake restricts the amount of air more than the CAI then there is a posibility of more power from the CAI.

    Most likely only at wide open high RPM.

    So I am sticking with the "sounds good" and that makes me happy.
     
  19. Aug 14, 2010 at 10:24 PM
    #19
    Duff Man

    Duff Man Well-Known Member

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  20. Aug 14, 2010 at 10:27 PM
    #20
    whippersnapper02

    whippersnapper02 Well-Known Member

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    Someone buy a dyno for their garage already.
     
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