Quote:
Originally Posted by wparsons
I don't agree with the original hypothesis. If it were the heads out flowing the manifold, it would get choked further as RPM's increase.
The IM spacers increase runner length and shift the power lower in the RPM band.
There's also good evidence that a good header and tune totally eliminates the torque dip without going near the TB and IM.
|
mmm.. Yes. I've seen this exact argument elsewhere and I think you were involved. My point is that this is an easily and relatively cheaply testable hypothesis. Also, we're not talking about intake runner length, we are manipulating plenum volume, albeit by adjusting the effective length of the plenum.