Quote:
Originally Posted by Gardus@Supersprint
I completely disagree.
While it's true that a tune can improve on the power delivery and get the best result from mechanical mods, a well designed manifold can improve performance without it.
The ECU has the capacity to change timing and A/F ratio to compensate for the improved flow.
The GT86/BRZ is a rare case in which a map can make a real difference, on most natural aspirated engines the auto-adjustment of the ECU is already enough to get the most of the mods.
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You will have to prove that adding any header with a crap tune is worthwile, I just don't see it. The key to a header tune is adjusting the vvt and spark and fuel profiles to eliminate the torque dip which is there in the OEM calib in part to deal with the manifold cat. Thestock ECU does not "learn" new vvt profiles. It also can't reduce the egr savaging.
Unfortunately its best to save for a header and a well matched tune. I think of this as a package.
With romradier and real open tuning just around the corner my guess is the most popular headers will be the smart buys as they will have the most developed shared tunes.
Headers and tune right now are a ridiculously expensive upgrade with the $1k tuning most places get. A year from now I think things will be much better.
Maybe nameless will get smart, drop viscoti, and include an open basemap from a good tuner with their header release.