well it's 20% even for the drivetrain loss..to me that's not too..too bad. as for the others. the car was purchased a day or two before thanksgiving. when i dyno'd it had 3950 miles. so it was pretty well broken in. i'm at 5500 miles right now, they're just racking up.
as for part of the reason why power delivery is not too strong past 4900-5000 rpm here's an tidbit from a post in general forum also another graph with air/fuel ratio added:
with an apex safc or fuel controller and 93 octane. to keep it at 12:5:1 or alil higher (i like to run my n/a cars alil lean) prolly can expect a nicer curve from 5000 rpm or so and up just by fuel tuning. here's my dyno graphs:
http://www.massimoperformance.com/images/ed/withairbox.JPG 
