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First of several test we plan to run. These runs about an hour apart.
Optimum spark table didn't change at all. VVT table changed quite a bit but resulted in about the same power. Square top obviously wanted less fuel past 7k.
Ran out of time on dyno today so we didn't try the spacers. We'll go back next week and do that. As expected, a bit more power on top with the S2, no significant gains in midrange.
What is key to note for folks who set their redline at 7000 (stock redline) is that there are no gains below that. We don't yet know if it will make more power below 7k with the spacers.
So I'm not that versed in intake plenum theory but doesn't the physics change dramatically for boosted engines (kind of like exhaust scavenging)? I am just curious if this will show more gains on a boosted motor than an N/A where the engineering is more important instead of plenum volume and flow.
Did you retune for the new manifold or just swap and run?
Uh...
Originally Posted by emilio700
...Optimum spark table didn't change at all. VVT table changed quite a bit but resulted in about the same power. Square top obviously wanted less fuel past 7k.
CRAP - I've got a port-matched Flat-top and now have one of these because I was POSITIVE that the Skunk2 intake manifold would flow better due to the Flat-top's narrow channel to the plenum chamber behind the TB.
Wont spend much time beyond 7,200rpm so there's no point switching manifolds for me - at least I won't have to go through the manifold installation hassle again :P
Pos-cat added for Dyno results, looking forward to more.