this dyno says SAE corrected, so it doesn't matter what temp etc the conditions were... so long as your next dyno is also SAE corrected, they should be comparable.

 

I'll reserve my final judgement of this header until AFTER you get the car retuned at Church's.

Also, did you give the car a chance to "relearn" after you installed the header (and before you got back on the dyno)? An ECU reset (and mandatory relearning time) is a must after installing any performance part...especially with something that changes the flow of a car, such as a header.

 

It is hard to see if you can't open his dyno sheets full sized (I can now, but couldn't before) you can see his A/F curve looks the same, thus his argument for it not needing any time to adjust. Berk's clearly showed the tune was off, until the ecu had time to adapt.

I would say to reset the ECU, and then make sure you drive it around a bunch to let it re-learn under the new conditions, before going to the dyno. If you can go to the same dyno, and use SAE correction each time, then changes in weather will be negligible.

 

Hesperia, CA Advanced Performance

 

+5 horsepower anywhere on a s2k's powerband is good to me
Loosing 11lbs just swapping out an header is good to me so paul

 

So, did you ever get it retuned?

 

Trying to find a harness for my vafc...if not I'm just gonna hardwire it

 

Interesting results. I'm going to link these to the header thread.

 

wait so did the berk header gain or lost power?

 

I think a more objective test would've been stock header + testpipe + catback vs stock header + testpipe + catback (and tuning on both would take it to a higher level). In all honesty, you probably wouldn't expect a significant change from a header if you didnt change the stuff downstream...especially given that the stock header is very good except in the weight department. I really think that would hold true with any header whether it was a J's racing or a ebay PLM.

I have a berk header myself, my main gripe with it is that it needs a lower bracket to deal with an engine that apparently squirms in the engine bay.