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DC Header

Discussion in 'Engine Building' started by jamesA, Nov 20, 2004.

  1. jamesA

    jamesA Well known pissed off telephone guy VIP

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    Ok I seem to have found a decent deal on a DC 4-1 header.

    here. I think I'm going to go with this since it's CNC machined stainless steel over that of a real JDM ITR header.

    Does anyone have any dynos of what kind of gains to expect off this header?

    after this is done I'm thinking about starting to save for the RSR exmag catback.
     
  2. K2e2vin

    K2e2vin Senior Member

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    i dont know about the gains but back in the days(not really lol) thats what lots of the honda street racers use.
     
  3. UDT

    UDT Senior Member

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    Expect a slitly adjusted powerband and 2-6 hp give or take.
     
  4. jamesA

    jamesA Well known pissed off telephone guy VIP

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    slight adjusted as power band moving up to a slightly higher RPM?
     
  5. UDT

    UDT Senior Member

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    mid range. The 4-2-1 will put it a lil higher.

    When i say adjusted i mean more linear. Not as many spikes.
     
  6. jamesA

    jamesA Well known pissed off telephone guy VIP

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    the header i'm looking at is the 4-1, which i've been told will focus on top end power, right?
     
  7. Cashizslick

    Cashizslick !i!i!i!i!i!i!i!i!i!i!i!

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    yeah, the long runners on the 4-1 move peak torque to a higher rpm
     
  8. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Wow, they machined the whole header from a block of steel? That's talent! :lmao:

    Both headers use the same manufacturing process....

    Performance-wise, the 4-1 "JDM" DC with the 2.5 inch collector will outperform the JDM ITR.
     
  9. K2e2vin

    K2e2vin Senior Member

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    i thought the same thing, untill i read this

     
  10. jamesA

    jamesA Well known pissed off telephone guy VIP

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    for the love of God... sorry I can't remember everything.

    Thanks for hte help Cal, sort of.
     
  11. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    You're welcome. :p

    The real JDM ITR header uses NC cut flanges too, I'm sure...
     
  12. jamesA

    jamesA Well known pissed off telephone guy VIP

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    So cal, what do you think of this setup.

    ~Crower stroker kit. 81 mm bore, 89 mm stroke, 1.83Ls - $2300
    *not sure if I should get the 4340 billet crank for 1500 or not, would it be wise to invest in that?
    ~Crower stage two NA street/strip cams, $1260 (480 is for recommended 84161 retainers)
    ~the CAI I already have.
    ~DC sports header, 4-1 stainless steel (refer to first post for link) - $270
    ~RS*R 2 1/4" catback - $600
    ~A'Pexi VAFC

    With a good tune, 200-210 wheel hp?
     
  13. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Skip the cash on the stroker kit and just buy a B18B. You'll save yourself about $1800. You can spend the difference on better tuning, a VTEC head, or an entire VTEC engine. Everything else looks good. I doubt you'll get 210whp on an all motor non-VTEC block pushing pump gas though, especially if you're only going to use a VAFC to tune it.
     
  14. jamesA

    jamesA Well known pissed off telephone guy VIP

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    Eh. I don't want to buy a non vtec block. The point of it is to see what I can get out of a b16a.

    To get it tuned perfectly should i invest in a hondata over the vafc then?

    Seems everyone likes to do 180s in every other thread about tuning advice.
     
  15. sohcslammer

    sohcslammer Senior Member

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    I agree, fuck the stroker kit. What c/r are you going to have? Instead of stroking it, you should sleeve and bore it. Also, check out the zex/comp cams 57200. I really like the specs as well as the price. Expect to pay around $800-850 for the cam and valvespring kit. Cams, springs, ti retainers, and assembly lube. :thumbsup:
     
  16. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Well, for the money you're planning to spend on the stroker kit, you can go with some crazy standalone setup and a B18 block. 81mm bore and 89mm stroke is what you get from a non-VTEC B18, and it'll have better geometry than a B16 stroked to 89mm too. Why spend $2300 to get it if you can do it for $400? Spend the $1900 somewhere else.
     
  17. B16

    B16 Super Moderator VIP

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    for that price of that 4-1 you could get the JDM DC 4-1 from titanmotorsports at $250 shipped. hell of a deal. if they still have the deal going on, check them out. thats where i got mine, much better than the US header.
     
  18. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Oh yeah- your price on the cams is really high. If you were thinking of getting the stroker kit because of the billet cam, there's no reason to- the stock B18 crank can run 600whp and 10k rpm without any issues. Just make sure its spin balanced at a good machine shop.
     
  19. jamesA

    jamesA Well known pissed off telephone guy VIP

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    you mean the billet crank, right? ;)

    Titan motorsports eh B16? thanks for the heads up. I'll look into that. I was gonna get that 4-1 because it's cheaper than a jdm itr. :thumbsup:
     
  20. phunky.buddha

    phunky.buddha Admin with a big stick Admin VIP

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    Yes. :p
     
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