Quote:
Originally Posted by WingsofWar
^ thats interesting
I have the same kinda scenario with my EJ251 (1999-2001 2.5RS engine). But its a single cam, non AVCS, oversquared engine.
vs Dual Cam, Dual AVCS, Squared engine.
There is quite a bit of difference between the EJ251 and FA20...
Yet we still see that same awkward dip.
Does the EJ20E and EJ204 and EJ254 see similar output characteristics? What about the FB20 and FB25? Id like to see them next to each other.
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If the dip is manifold related then it is likely acoustics. It could be more that the manifold runner lengths are more similar (at least relative to the dip's rpm), even if the motors aren't.
But I would think that the AVCS could tune around most of it, compared to the older non-AVCS motors.