I just got off the dyno after doing the full airbox mod (as grabntwist shows in the pictures above). I took the actuator off and removed all the piping just to clean things up. I've got the HMF high-mount full system with a K&N and a TRE. The pair valve has been removed and the block-off plates installed. Here's the dyno results:
HP was down about 1 1/2 below 4K. There was a slight dip at 7K of maybe 2 hp. From 8 all the way to 11K the HP climbed. Normally, the HP peaked at 10.5K. Now it climbed all the way to redline. I gained 7 HP. That's 7 free HP. The small dip at 7K isn't noticeable, and the one below 4K doesn't matter to me at all. I try to keep it above 4K unless I'm in a residential area. I would highly recommend the full airbox mod. My next step is to put the fans on the scoops and see what I gained from sealing the ram air tubes at the airbox and installing the scoops. I'll keep you all posted. There's racing fuel on the agenda as well.
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Not fast enough...yet.
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