There`s one thing that isn`t clear to me..

The DC JDM and Type one performed almost the same vs stock.
But compared to each other, Type 1 was pretty much over DC JDM.

How can this be ???

http://bob123e.tripod.com/thegreatheadertest/




[Modified by ITR1858, 10:31 AM 3/7/2003]

 

What are you talking about?

Look at graph comparison and area under the curve.

Ignore peak numbers.

 

Okay, here we go:

These are the graphs of DC vs stock and Type 1 vs stock one over the other.
Look at the blue line... DC and Type 1 is almost the same....



Here is the graph from the GHT DC vs Type 1:



So HOW can this be ???

 

Looks like the overlay you made is accurate.

The other overlay is clearly an error, that's all.

 

Well,
if this is it...

 

What's so hard to decide?

They perform pretty much the same, get the cheaper one.

 

Looks like it's shifted in the second graph...

 

I already got my header, that`s not the point.
But we have a general discussion at a german board. Some mates want to order headers and we tried to figure out what`s a good decision.
I found the graphs and we just wondered could have happened and I thought it`s good to ask this question here at HT.

But if the answer is that simple... ok. Thanks. That`s all.

 

So you are like the German Ambassador at H-T?

 

Hahaha,
I`m doing my very best to carry over the HT message to the german scene...
Tech- and performance related mods and thinking instead of 9*14 195-Tuning like people do..

Further I can report about the things we do in Germany... We got some high quality performance stuff which is not known outside our land.

So yes, I would say I am

 

[QUOTE]There`s one thing that isn`t clear to me..

The DC JDM and Type one performed almost the same vs stock.
But compared to each other, Type 1 was pretty much over DC JDM.

How can this be ???

http://bob123e.tripod.com/thegreatheadertest/

QUOTE]

The second graph on the site isn't correctly aligned. The DC/JDM 4-1 and the T1R are very similar performers. I'm replacing my sliighty dented DC/JDM with the T1R becuase I want more ground clearance. The DC in SS can be had for $400 to $450 and the T1R goes for anything from $525 to $650 depending on which place you buy it from. If you're not worried about ground clearance get the DC. The T1R is "supposed" to deliver the torque a bit sooner... neither of these graphs show that... I guess well see. I'll be tuning in the mid-spring and will post graphs then.

 

The graph overlay had some issues when they where completed. As items were brought to attention "most" of them have been corrected.

Mattj

 

Hello!!!


Look at the hp/tq crossover point. One is CLEARLY in the wrong spot.

The overlay in the second graph is off.

 

how do you overlay images in photoshop?

I think i have to make the image opaque?

 

Yeaup, just adjust the opacity on one of the images.

I also compared the JDM 4-1 to the T1R header and they look VERY similar. I actually compared the JDM 4-1 to ALL of the headers, and the header that look like it gained the most is the Spoon.

 

Spoon...
Now the question has to be: What happens if the car`s got bolt ons, a better software and/or mild cams....

 

the spoon header can handle that too

 

At IPS..

Would you please answer me one question: Why do you prefer the more expensive Type 1 header over DC?

 

One thing I found looking the header test is the type one out performs all headers in the test betweek 5k-6k in both hp and torque. It does not perform that well at the very top end even compared DC JDM. I don't live at the redline so for go mid range and price, I'm going to buy a type 1.

 

I don't know, I beg to differ. The gains are VERY similar. The only BIG increase i saw over the JDM 4-1 was the spoon header.. especially in the midrange.

 

don't just pay attention to dyno graphs. look at the design, also.

t1r is 4-2-1 which means will deliver more mid-range.
dc is 4-1 which means will deliver more top-end.

it maybe be more evident on wilder set-ups.

 

The dyno charts do show "mid-range" or "top-end" gains for both headers - that's the entire purpose of a dyno test. The charts for both the DC JDM 4-1 and the T1R 4-2-1 are extremely similar. If a 4-2-1 automatically made more mid-range and a 4-1 automatically made more top end, why wouldn't the dyno reflect that fact?

- Chris, who wonders if "transients" will somehow work their way into this thread next

 

exactly. which is why i ask myself the same question.

 

You can only base So Much on the Header test. I wouldn't use it as my Main reason of what to buy but just as a loose comparison.

The headers will all react differently Once the car is tuned, with mods, etc.

 

Which I why I can't wait to get my hands on that new T1R header I just ordered from Mike!