Header tests are not as easy as they sound.
About 2 months ago, I had a header test lined up with hytech, dtr, hasport, k20eg, true race and tsx headers. Needless to say the test never took place for a few reasons.
I am not going to go into details but just to give you an idea why this is hard to do.
A test like that usually benefits the cheaper headers because the testers can see how they measure up to the competition. At the high grade high $$$ level, it is a different story.
As you know, each header to make good power needs to be fully tuned etc..
It would be very very very time consuming to fully tune each header on one car under same conditions, same dyno etc...
Even so, there are still problems... Derek from hondata gave me some advice on how to setup a header test like this.. Check out wht he wrote
It would be quite time consuming to dyno all the headers, as each should be
tuned to give maximum output.
What I suggest is to pick a baseline header (perhaps the TSX), and fully
tune the KPro to that header. Establish the best A/F and take care to make
the A/F flat around that optimum point. Lower the VTEC point to around 4000
rpm if possible.
Then for each header keep the same ignition and cam angle settings, and
perform any fuel tuning you need to keep the A/F within a certain range.
e.g. if the dyno shows you make maximum power at 12.8:1 A/F, then for each
header make sure the A/F is from 12.6:1 - 13.0:1, adjusting fuel if
necessary. This will give close to maximum output for each header without
requiring a lot of re-tuning for each header. Chances are they will run
much the same A/F anyhow.
To make the testing fair just run the headers without an exhaust. Otherwise
you'd need to adapt the exhaust to each header, which would take a lot of
time as each is probably a different length and diameter.
but even in that case, picking the TSX as baseline header, will affect the high power headers... and so on....
Just wanted to give you an idea why a header test is really hard to make "fair" and why big tuning names do not like to be involved unless they are present there to control each variable. I do have to say that Danny from DTR fab was excited about it and offered to loan me a header and take care of the shipping as well as Brian G and Joetype S even offered to bring his own true race header and help out with the test..... :wink: