Everyone is always saying the DC JDM Header is the "best header for the buck" for a B series motor.. now.. thinking about this..



How does this collector flow so purely..
It really doesn't look like it should..

Thank GSRCRXsi for the picture

 

Its not that we say it does, It has been proven that it does in the great header test.

 

agreed.. but with that collector I'm trying to make sense of it hahah

sorry for incorrect wording..

The dynos prove the header is better.. not "what people say"

Is that better hah

 

interesting point....

 

is that the dc jdm style header.. oem jdm 4-1 has a different collector.. little smaller

 

DC

 

Well, the collector isn't terrible, but I think you may be overestimating the header's performance ability somewhat. It is unarguably a tremendous performer for the money (hence the "bang for the buck"), but there are of course bette-performing headers out there. What specifically about the collector strikes you as being poor?

 

.. the purpose of a header is to have "even" length coming into one right? .. well looking at the collector.. the air isn't evenly distributed out is it? .. just a thought.. wondered what everyone else's ideas about this were

 

I think the whole thing with this header is the price for flow.....low price, high flow. It's hardly the best header out there, but for about 1/3 of the cost of the top of the line header, it can't be beat.

It's going to work for me til I save up for SMSP.

 

Look at the JDM Mugen collector.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SMSP &raquo;</TD></TR><TR><TD CLASS="quote">Look at the JDM Mugen collector.</TD></TR></TABLE>

Any pics?
I'd Love to compare

 

I wondered the same when I bought one. Seems like a of turbulence must be created right there.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by jond &raquo;</TD></TR><TR><TD CLASS="quote">Seems like a lot of turbulence must be created right there.
</TD></TR></TABLE>

I agree.. I guess that's just something to think about on this header (DC)

 

Has anybody here ever take a dremell to the collector to smooth it out and open it up??

 

I'm sure too much dremeling would make it so thin it'd burn (anyone think agree?)

But .. its not going to improve flow very much with a dremel

 

I thought the 4-1 STAINLESS HEADER part # was (AHS6612) not AHC6612 I could be wrong.

Never mind the "C" is for Ceramic Coated.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Heisdan &raquo;</TD></TR><TR><TD CLASS="quote">I agree.. I guess that's just something to think about on this header (DC)</TD></TR></TABLE>

I don't mean this in any sort of derogatory way, but regardless of one's opinions on the collector's design, the header itself has proven to be an extremely strong performer relative to its cost. It doesn't seem that there's much more to "think about" regarding it.

I also have a strong feeling that if we collected photos of the collectors on various headers, few of them would be considered "optimal" looking. Remember that the majority of these headers are designed to work within the space constraints of the stock exhaust system, and many are manufactured in a such a way that minimal cost is a high priority. When these restraints are loosened or removed, we see much better designs and higher performance. Another thing to keep in mind is that, regardless of how something should theoretically perform, the actual results can often be quite different.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by XtraFastCRX &raquo;</TD></TR><TR><TD CLASS="quote">is that the dc jdm style header.. oem jdm 4-1 has a different collector.. little smaller </TD></TR></TABLE>

Dave (SMSP) is fixing up the collector on my old SS DC 4-1 by upping the size to 2 1/2" (though the collector in that one is what was called a "merge" collector that comes to a point where the 4 inside walls meet),



and We'll be fitting his newer style 2 1/2' cat back. I hope to get a before and after dyno comparisson of the stock 97, then with the new exhaust and finally with the Mugen ECU and tuned cam gears.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Padawan &raquo;</TD></TR><TR><TD CLASS="quote">I don't mean this in any sort of derogatory way, but regardless of one's opinions on the collector's design, the header itself has proven to be an extremely strong performer relative to its cost. It doesn't seem that there's much more to "think about" regarding it. </TD></TR></TABLE>

I agree to a certain point.. If your aware the collector itself isn't perfect.. there is room for improvement.. that's all I was calling attention to.. I do agree that is the best header for the buck.. and "an extremely strong performer relative to its cost".. that is why I have one on the way Which actually the picture above is the exact one.. hmmm

I'm just looking at the collector thinking to myself.. hmmm (to dremel or not to dremel)

 

OK, I understand better now. I think you'll find once the header arrives that the collector is pretty "clean" as-is. There might be some very minor work you can do with the Dremel, but nothing as noticeable as say, the port welds on the JDM Honda 4-1. I was rather impressed with the quality of mine, all things considered. Good luck with the new header.

 

the collector doesn't appear the same was as the picture is.. I'll have to post another picture... definitely better in person

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Heisdan &raquo;</TD></TR><TR><TD CLASS="quote">the collector doesn't appear the same was as the picture is.. I'll have to post another picture... definitely better in person</TD></TR></TABLE>

See?