From a previous post of mine , I found that the front of my airbox had been cut away just to leave a hole ,
I managed to buy a compete airbox off of Ebay , so with high hopes of a better torque cure off I went back to the dyno shop .
In a effort to try and be as precise as I could , I wanted to dyno the bike on the day as it was , fit the new lid and plumb it in and then dyno it again , so same dyno on the same day.
First base run over , we fitted the new lid ,
and then dynoed it again , and the results were............
disappointing to say the least . I lost a tiny bit of hp and also torque - bugger bollocks
I've no idea what's going on , and how the standard airbox is worse than a hole cut in the lid ? , and I've also lost about 8hp in both cases . It looks like the power commander could be at fault , as it also kicked out 114hp from a dyno graph a couple of years back when I had the twin stack system fitted. Then with the power commander it increased to 122hp . Other factors on the day could account for 1 hp either way , but not 8hp.
Anyone any thoughts on how/why the standard airbox is worse than a big hole ? . I've also checked that it's working OK , and can confirm at just over 5000rpm the flap does open ( actually much quicker that I though it would )
Mike