Enlightened

Was wondering if anyone is running this header for their SC application and can provide any feedback. As far as reported gains/losses and overall impression. I just can't get the big daddy right now and this would be a great 4-1 alternative.

The design is VERY simliar to Comptech's...

Let me know!

s2000Junky

No sorry, never heard of it. But I'm always interesting in looking for more ways to make power without adding boost. I'd like to know as well since I'm still running OEM.

Enlightened

Here's the link Junky, it's also in the official header thread. They first listed it around $950 but it's $800 on their site, so I may consider purchasing:

https://www.s2ki.com/forums/index.ph...ic=761926&st=0

On their site:

http://www.arkspeedracing.com/01_ON_Honda_...ah0600-000d.htm

s2000Junky

Cool thanks.

Its a tough decision for me to go with a header, oem is really quite good. I need some real data to know what I'm getting. I like the idea of the 4-1 design becuase of the added mid/upper gains they can provide, but not if there is a loss in the lower rpms. I'd like to know if there is any losses before I take the plunge.

JawKnee

I have Comptech's old dyno comparing stock vs non-CT (aftermarket) header with CT Icebox vs CT header w/ CT Icebox. No SC'd comparison however.

Enlightened

How did it look Jaw Knee? Can you post it?

Junky, I totally hear you. I emailed ARK up and they claim there is a dyno post here on the forums, so I replied back asking to show me the link.

JawKnee

Hopefully this works: http://dl.dropbox.com/u/7036956/CTs2kHeaderDyno.pdf

Out of curiosity, I know people say that the CT header was designed with SC in mind, but I didn't necessarily hear that in my correspondence with them.

Is it because of the 4-1 design lends itself more advantageous to the upper-end where centrifugal SC's shine?

Enlightened

Yeah, that's my understanding. Junky can break it on down, but the 4-2-1 shines in low to mid RPM's while the 4-1 is mid to upper RPM's, taking advantage of the SC. This is why the Hytech longtube SC version is dyno proven, and they designed it with a SC (but oh so expensive...).

Thread below:

https://www.s2ki.com/forums/index.ph...ic=781582&st=0

Enlightened

Interesting comparo Jaw Knee, thanks.

s2000Junky

Yeah generally this is true. The OEM header being a 4-2-1 and a good one, offers a good broad power band which is tough to improve on. The next step is to shift the efficiency range up to make more gains with the 4-1 design... but then there is the fear of losing some of what makes the 4-2-1 so great down lower in the rpms. There always seems to be someone that figures out how to break the rules, but this is the basic theory behind the two designs. Its natural to think that the 4-1 header would lend itself to making the most of an SC set up by the efficiency range of both.