I got the Evo air kit in the hopes of minimizing the big torque dip I've got at 5k. I was super anal about ensuring only filtered air gets into the engine, ran a 2" wide strip of adhesive-backed foam rubber around the underside of the tank, lining up with the gasket. She's (air)tight I did leave the stock insulation in place, it seals to the evo gasket in a couple of places as well. Also figured the insulation might "soften" any resonance-induced torque variations. I also removed the resonance tube thingie in the ram-air collector below the main airbox at this time.
Previous dyno results:
Original baseline configuration: 2003 Tuono, Aprilia Ti EVO can (and chip?)
peak 68.7 lb-ft @ 7000, 110.3 hp @ 9400 (avg. A/F ~12.4:1)
dip 51.2 lb-ft @ 5150 (locally rich, A/F = 11.95:1)
removed short "restrictor" tube at inlet of main airbox:
peak 68.6 lb-ft @ 7150, 109.8 hp @9400 (avg. A/F ~12.4:1)
dip 52.9lb-ft @ 5200 (locally rich, A/F = 12.25:1)
Dyno results after air kit (and removal of resonance tube thingie):
peak 69.5 lb-ft @ 7050, 111.3 hp @9400 (avg. A/F ~12.0:1)
dip 51.2 lb-ft @ 5100 (locally rich, A/F = 11.65:1)
In all, not much change, slightly more peak power but the dip is back to it's original low. Interestingly, the A/F mixture is a smidge *richer* with the air kit, by about 0.4. I would've figured it to make the mixture leaner if anything.
We did another run with the cooling fans aimed at the intake scoops, and found some mo' torque and power:
peak 70.1 lb-ft @ 7150, 112.1 hp @ 9500 (avg. A/F ~12.2:1)
dip 52.0 lb-ft @ 5100 (locally rich, A/F = 12:1)
I'll post results as soon as I figger out how, picture's worth a thousand words, eh?
So, the quest for torque at 5000rpm continues
Looks like full duals are in my future. Wonder if there's any way to graft those neat-o lookin' brushed blue cans from the '04 Mille onto my bike...