Originally Posted by
macakin was the exhaust replaced with a bigger one to make those dyno runs, or was the header bolted to the stock exhaust?
stock exhaust, bolted up and with stock cat.
This litterally was strapping the car down, doing about 7-8 pulls with the car stock seeing how it responded to ignition timing changes, then swapping the header...
The first pull the header made 20whp gain from 5000rpm, then the next 2 it made 4 whp more and that was it. I checked and it was correcting itself and retarding IGN timing and adding fuel. I unplugged the ECU, did a few more pulls adding timing, and wound up at about 20ish, maybe 22 deg advanced to get this power curve.