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Cold Air Intakes?

Discussion in '4 Cylinder' started by 4bangerowner, Jan 15, 2014.

  1. .MarkyMark.

    .MarkyMark. Jesus follower

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    I wish you would test Doug Thorley's with that same setup.
     
  2. tooter

    tooter play every day

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.

    That would be an interesting experiment. :)
    I chose LCE over DT because the tubes are a way longer.
     
  3. anders99

    anders99 The Sailing Member

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    Halo Led Headlights Led Taillights 3'' toytech spacer lift on front end Toytec AAL on rear AFE cold air intake Pioneer Appradio 2
    I am running the AFE cold air intake. No noticeable gains other than noise. In 1st and 2nd at high rpms it sounds like a pissed off go cart but 3-5 sound pretty good. When driving intake temp is with in 2-3 degrees of outside temp.

    [​IMG]
     
  4. .MarkyMark.

    .MarkyMark. Jesus follower

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    I guess I'm just worried about the whole emissions thing. I like the fact that the DT's are CARB exempt. I mean I guess it wouldn't hurt to just take them off every time, but what a pain. Most of all, I want more power. For lowering the torque curve, I think the DT's might prove better on the dyno... in theory about the whole 4-1 vs. 4-2-1 thing.
     
    Last edited: Jan 26, 2014
  5. crawl

    crawl Well-Known Member

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    the LCE looks like a well designed header and your dyno results show a significant increase in torque at a LOWER rpm. Can't ask for more than that imo.
     
  6. crawl

    crawl Well-Known Member

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    I agree with your concerns about CA smog BS...and taking off the header would be a PITA!

    The old school theory of a try-y header making more torque than a 4-1 is not always accurate. It's more about header design..equal length tubes, merge collectors, tube size, velocity, scavenging. There is a lot of science behind it. Talk with any good header builder and you will be shocked with all the variables involved.
     
  7. .MarkyMark.

    .MarkyMark. Jesus follower

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    I imagine you are right about all the variables you've listed. I am nonetheless interested in the result of a DT header under the same circumstances. Speaking of which, tooter, I have an idea. I'll buy the DT's relatively soon and let's throw them on your truck to dyno them before I perform the install on mine.
     
  8. crawl

    crawl Well-Known Member

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    ^^we all live relatively close to each other.. lets setup a dyno day :)
    plus i wanna see that volant intake in person! very nice setup
     
    Last edited: Jan 27, 2014
  9. .MarkyMark.

    .MarkyMark. Jesus follower

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    Thanks, I'm down. Tooter?
     
  10. tooter

    tooter play every day

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    2012, std cab, 5 lug, 2.7, 5 speed
    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.

    You can't throw them on my truck because my engine only holds one! :laugh:


    Sure, I'll offer my truck to be used as a test bed as long as it's done at HK Motorsports Dyno Shop in Van Nuys, it's done on Saturday because of work, and I don't pay for the dyno. ;)


    We can swap headers at my house when everything is cold. The truck will need to be driven around some so that the ECU can relearn the new parameters. Then it's off to Harry's for testing as he's only about 12 miles away. We'll use my runs with both the header and intake manifold spacer for comparison so I don't have to remove the spacer. The only rub is that since the last runs, I've removed the stock exhaust and installed a custom MagnaFlow cat back. So that is likely to skew the results. But if you guys are up for it, I am. :)


    I have another broader question that gets to the heart of the matter:


    Since you're considering their header, why not ask Doug Thorley to release their own dyno tests for their own header?


    It's impossible for them to design and build products without logging before and after dyno runs. I chose LCE because I'm old school where long tubes always trump shorties on low end torque, while shorties make more top end horsepower. Just something to consider... :)




    Greg
     
  11. Jetlander

    Jetlander Just trying to measure up...

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    I've got a Volant Scoop I'd sell for $50 +shipping. Had it on and then decided to change to a snorkel.
     
  12. tooter

    tooter play every day

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.

    I'm hoping that LCE gets a CARB number by the time I'm up for testing. They have them for some of their other headers. The LCE header on my 1996 Taco had it. I ran it for ten years and it passed all the smog tests with flying colors.


    That's because there's another old school theory that long tubes make more torque than short tubes. ;)


    Greg
     
  13. tooter

    tooter play every day

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.



    Now that's a good deal. :thumbsup:
     
  14. crawl

    crawl Well-Known Member

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    yep. my Honda header always passes the sniffer.. its the visual with no carb # that does me in

    ha
     
  15. .MarkyMark.

    .MarkyMark. Jesus follower

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    I think that sounds good... Did you by chance happen to run a stock dyno with your a/c and power steering hooked up?

    Yea, you're right. I think I just love the idea of having a "no hassle" gain.
     
  16. tooter

    tooter play every day

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.

    No. I used URD's 2.7 baseline dyno for their supercharger. Then I did runs with these mods:


    Injen intake
    LCE header
    Stock exhaust
    No PS no AC


    Then the latest dyno was with these mods:


    tooter II.VII intake manifold spacer
    Injen intake
    LCE header
    Stock exhaust
    No PS no AC


    So any results will only be relative to changing the header from LCE to DT. But it will also include the MagnaFlow catback because I no longer have the stock exhaust. That extra change is likely to cloud the results, so give it some thought before you decide to do it.


    It's not easy to get an absolute apples to apples comparative runs unless you have control over all of the conditions. I needed to log accurate results with the intake manifold spacer as absolutely the only change, so that it would be fair and honest. So all of the other conditions had to remain exactly the same regardless of what they were right down to using the same dyno machine.

    It's up to you. I'm willing to do it. :) If any other guys wanted to come and run their trucks, we could do a dyno day.


    [​IMG]


    [​IMG]


    On the other hand it's cheaper and far less trouble to simply contact DT and have them provide you with documentation of the gains for their own products.


    Greg
     
    Last edited: Jan 28, 2014
  17. crawl

    crawl Well-Known Member

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    Im down.. van nuys is close to valencia :)

    I just found the post below from this thread http://www.tacomaworld.com/forum/4-cylinder/85764-doug-thorley-vs-lc-engineering-3.html#post4207411

     
  18. tooter

    tooter play every day

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.
    Thanks so much for reposting that useful bit of information. That's a great help. :)


    Notice that the DT header makes it's torque peak at 4,000 rpm.


    [​IMG]




    Whereas my LCE header makes its torque peak at 3,150 rpm. (it's the blue run without the tooter manifold spacer)


    [​IMG]


    So right here is definitive proof that the LCE 4-1 long tube header lowers the torque peak more than the DT 4-2-1 short tube header. :thumbsup:




    Greg
     
  19. taco2010trd

    taco2010trd Well-Known Member

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    Waste of money. Won't result in any performance gain.
     
  20. tooter

    tooter play every day

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    Built for maximum low end torque, tooter II.VII intake manifold spacer, LCE long tube header, Injen long tube intake, 2,900 rpm torque peak.

    Stock truck
    Stock intake
    Stock header
    Stock exhaust


    119hp 133tq



    My truck
    Injen intake
    tooter spacer
    LCE header
    Stock exhaust


    137hp 160tq


    18 more horsepower and 27 more foot pounds of torque with the torque peak lowered by 1,100 rpm cost me a total of $938. I actually think that's a pretty good deal just for bolting on three simple accessories. :)


    Greg
     
    Last edited: Jan 28, 2014
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