Interesting H22A header results

[Cb3vtec]

I came across this, thought it was interesting: http://vimeo.com/30353942

[Kurobei]

Very interesting results!

Before watching this video I thought the results were going to be Bisiimoto > Tri > RMF.

This proves that depending on your engine build and setup can result in very different results. What one header might do for one engine may net better or worse results on another + the given fact that no two engines are created equal out of the factory anyways.

[cb7remnant]

still like bisi header design better lol

[Darkcloud]

I seen other builds dyno'd with diff headers and sad to say Bisi's header still dont come out top, the builds ranged from mild builds to hi comp builds from what I seen. A header with less bends produce more power, why??? Because better more efficent flow.

[antonio7566]

What do you guys think about the the Logic Tri-Y header being a one piece design with no flex pipe and no lower mounting bracket? Wouldn't that cause some type of stress on the header. I know the this applies to the other headers as well. For a $400 header the Logic Tri-Y seems like a good deal any thoughts?

[tommi]

great documentation comparo. and that eg is loud as fuuuhhh @_@

[Darkcloud]

What do you guys think about the the Logic Tri-Y header being a one piece design with no flex pipe and no lower mounting bracket? Wouldn't that cause some type of stress on the header. I know the this applies to the other headers as well. For a $400 header the Logic Tri-Y seems like a good deal any thoughts?

The tri y header is sturdy as hell.

I ran a hard weled header no bracket didnt crack at all.

[The G-Man]

What do you guys think about the the Logic Tri-Y header being a one piece design with no flex pipe and no lower mounting bracket? Wouldn't that cause some type of stress on the header. I know the this applies to the other headers as well. For a $400 header the Logic Tri-Y seems like a good deal any thoughts?

The Bisi header does not ship with a mounting bracket or flex pipe either...

These are all custom fit headers.

[antonio7566]

The tri y header is sturdy as hell.

I ran a hard weled header no bracket didnt crack at all.

Thanks for the info, it's good to know from some one thats been there done that.

[cloudasc]

Those outputs are so close to each other, what about a margin of error? Theres so many variables... things that can cause those variations. Slight temperature, humidity, how hot the engine is, and many other things can cause the differences. Were talking about a 1.4 hp difference between the Try Y and the Bisimoto. Thats a 0.6% (six tenths of a percent) output difference.

[Raf99]

Those outputs are so close to each other, what about a margin of error? Theres so many variables... things that can cause those variations. Slight temperature, humidity, how hot the engine is, and many other things can cause the differences. Were talking about a 1.4 hp difference between the Try Y and the Bisimoto. Thats a 0.6% (six tenths of a percent) output difference.

Good points and we can only assume they had these areas covered. If engine temp was an issue the order they ran them in would affect the outcome. Tri-Y would be 1st (which it was), then Bismo & RMF.

[19dabeast85]

This proves that Bisimoto actually has good competition with h22 headers. yeah the tiny difference in the 3 could be done to martin of error. I got more margin than that between 3 back to back dyno pulls as my header heated up (hotter header makes more power than a cold one). Bisimoto's didn't make as much low end power though and that's the biggest issue those guys had. My bisi header makes more low, mid, and high end power than the dcsports but then the f22 and h23 are different animals.

[98vtec]

Having a bad power drop in the meat of the powerband does not show competition.

[604_SE]

i wish they did a run with stock headers...

[Ghetto_CB7]

peak power rpm

This test has some strange results. I am sort of weary of accepting some of the findings.

First even though they say they adjust the afr after each one, they don't show it. Why not? I mean if we are picking apart tests let's be fair about this.

You cannot even see the rpm scale, which is one of my biggest gripes. If you look at the peak power rpm you will see what I mean the tri makes peak at 7900 rpm, and the rmf at 7650, yet they appear to peak at the same rpm when overlaid.

I do not know the civic's setup, but he obviously has cams. So when I see the bisi header peak at 7450 I get first concerned, then skeptical. I and all other posted h22 dyno with his header made peak power at about 7200 with a stock cam. I will be very surprised and disappointed if my peak power only goes up 250 rpm with a head build. The engine in question can obviously make power higher according to the tri y results. So what happened with the bisi? Was it built for a stock h22 head?

I know we also have concearns about the "custom" bisi headers being identicle minus some changes in b pipe size, but have we ever really verified either way?

I would imagine, and hope that if they are custom that the runner lengths would be different, or possibly some combination of runner length and volume, since it is a 3 step diameter runner header. Let's take some measurements and find out. And if they appear to all be the same let's show proof.

I realize it would have been nice to have proof provided for us, but hey what can you do.

Just some thoughts. I am away from my car for a few weeks, but when I get back I will try to take some measurements.

And as has been said these numbers are all really close.