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Thread: DC Sports 4-1

  1. #1
    Join Date
    Feb 2002
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    Gainesville, GA
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    Default DC Sports 4-1

    Any opinions on this header? It's 1/3 the cost of a Skunk2 or equivalent. Trying to find the sweet spot for cost vs ultimate performance with bolt-on engine parts.

    Thanks.

    Rory

  2. #2
    Join Date
    Jan 2008
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    North Olmsted, Ohio
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    519

    Default

    Ive used a DC header on my car for a long time and im satisfied with it. Are there better headers out there? Yes, im sure there are. But in my opinion for the price and the durability of the DC header, you cant go wrong.
    Greg Vandersluis
    #4 1990 Honda Civic Si
    #97 2003 Chevrolet Corvette Z06
    #93 2006 Ford Mustang
    Carbotech/BFGoodrich/Vandersluis Motorsports
    2010 Great Lakes Division ITA Champion
    2012 Great Lakes Division T1 Champion

  3. #3
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    Feb 2002
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    Default

    Thanks Greg. Just the sort of first hand info I was after. Are you using a 4-1 or a 4-2-1?

  4. #4
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    North Olmsted, Ohio
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    Default

    Quote Originally Posted by backformore View Post
    thanks greg. Just the sort of first hand info i was after. Are you using a 4-1 or a 4-2-1?
    4-2-1
    Greg Vandersluis
    #4 1990 Honda Civic Si
    #97 2003 Chevrolet Corvette Z06
    #93 2006 Ford Mustang
    Carbotech/BFGoodrich/Vandersluis Motorsports
    2010 Great Lakes Division ITA Champion
    2012 Great Lakes Division T1 Champion

  5. #5
    Join Date
    Jun 2001
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    LaCrosse Wis
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    Make sure you are looking at a race header with a 2 1/2 inch collector. A lot of header collectors are as I recall 1 7/8" to fit with a stock cat converter and exhaust. That small collector puts a cork in the goodness.

  6. #6
    Join Date
    Jul 2010
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    West Michigan
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    Default

    I did some research into headers a few months back for the CRX.

    A 4-1 header will generally give you more high end power and is better for high RPM applications.
    A 4-2-1 will give you more low end and mid range torque.

    Exhaust pipe size also matters. Smaller diameter pipe will increase your back pressure which helps on low end torque but suffers at higher RPM's. Vice versa for a larger diameter pipe. Most Honda-Acura (early 90's 4 cylinders) exhaust write ups I have seen recommend either a 2.25" pipe or a 2.5" pipe depending on tuning levels. A 10/10th's engine will be putting out more exhaust flow for more of its operating cycle and can make more use of the larger diameter pipe.

    So when changing headers make sure to look into what the effects are going to be on the system. A higher flow rate (4-1 header) could be hindered by using a smaller diameter pipe thus negating its added flow rate.

    Note: This is coming from an internet junky who reads forums, tuning articles, and others personal experiences to make informed (seems like a good idea) choices. Take what I said with a grain of salt. Ask some experienced exhaust techs.

    If you already knew what I said then well someone else one day may find this useful.

    -Sean

  7. #7
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    Feb 2002
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    Default

    Thought I'd add this. Since I've started my research, Skunk2 has come out with their Alpha series of headers for the B engine. They say it is the same design with some "manufacturing changes" to allow them to offer them for less money. Seem like they are available for a little over $400 and they have a 2.5" collector.

    My opinion is that this is now the sweet spot. I will be keeping my eye out for a deal on one of these.

  8. #8
    Join Date
    Jul 2006
    Location
    Sunnyside, NY
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    1,197

    Default

    Rant: I was on d-series.org ALOT back in the day, even got me some H-T. The understanding was that two headers proved to be the best for the D-series engine, and some argue even the B series. Both Hytech and SMS-P offer custom designs and off-the-shelf. Last study I saw showed that the off-the-shelf Hytech would produce about 1whp more than the SMS-P on a D16a motor with simple I/H/ECU mods. Hytech went for about $1400, which is $700 more than the SMS-P. That was 2 years ago and I am sure other brands have joined the best of breed header market. DC was, perhaps still is, considered the best value. Yet, I don't see much of apple-to-apple comparsions these days, though I don't read tuner mags anymore. I have a custom built 4-1 SMS-P header currently. It was purchased used, the original owner had it coated by swain and designed it for a medium street d16a motor as it does have a 2" collector.
    Last edited by mossaidis; 10-10-2011 at 10:53 PM.
    Demetrius Mossaidis aka 'Mickey' #12 ITA NESCCA
    '92 Honda Civic Si
    STFU and "Then write a letter. www.crbscca.com"
    2013 ITA NARRC Champion and I have not raced since.

  9. #9
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    Jun 2001
    Location
    LaCrosse Wis
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    For what its worth, I just purchased a Alpha series for my type R to replace what looks like a skunk clone 4/2/1 with 2.5" collector. As for exhaust, we run a 2.5" straight pipe with turn down having a 24" cherry bomb at the end.
    http://www.summitracing.com/parts/IMM-87529/ The pipe ends before the fuel cell and it has both a turn down, and I install a deflector so to reduce the chance of exhaust heating the tank.

    Something I do is put a piece of tin between the downpipes and the block to prevent the header from heating the block. I keep the vertical downpipes unwrapped to prevent really high temps from causing cracking. I do wrap the lower downpipe where it passes under the oil pan to reduce heat transfer to the pan because its really close.

    A final note is to flange and bolt everything,use a flex joint at the end of the header and do not forget to install a hanger from the engine to the header. Most header failures are due to non support of the header from the engine. I use the stock rubber hangers for the pipe, but I also put a metal strap under the pipe to prevent the pipe from dropping in case you bottom the exhaust out and it strips the hangers away. This approach has been bulletproof on CRX's, Del Sols and Integra's.

  10. #10
    Join Date
    May 2003
    Location
    Lagrangeville, NY
    Posts
    694

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    I have a SMSP header at on my D16. I have not used any other header other than an ebay header. Very happy with the product.
    Chris Raffaelli
    NER 24FP

  11. #11

    Default

    You may want to look at a hytech replica header. The are built by Private Label Mfg and cost around $350. I recenlty installed one on my Integra and for the money, the fit and finish is nice.

  12. #12
    Join Date
    Jul 2006
    Location
    Sunnyside, NY
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    1,197

    Default

    The d-series header from PLM is not compatible with PS and AC components, otherwise it looks like a sweet deal.

    https://www.privatelabelmfg.com/prod...d16-header.htm
    Demetrius Mossaidis aka 'Mickey' #12 ITA NESCCA
    '92 Honda Civic Si
    STFU and "Then write a letter. www.crbscca.com"
    2013 ITA NARRC Champion and I have not raced since.

  13. #13
    Join Date
    Jun 2007
    Posts
    28

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