Hi guys,
Just wanted to mention something that some of you tech minded guys may find interesting. Am in the process of fitting Bassani pro streets to my 07 train. (with cams and other goodies). I am dynoing each change as I make it for my own reference.
Bike was baselined with S&S slip-on's , SE air cleaner (stg1) and custom map. (AFR's spot on)
Next run Bassani pro streets with baffle (turn outs), SE air cleaner (stg1) and new custom map to suit. (AFR's same)
After fitting the Bassani's the bike was very rich with the baselined map. Most of the Dyno time was spent pulling fuel OUT of the map. The opposite of what I would assume with pipes that are more open.
The Horsepower picked up by a 5hp max, but held slightly higher than base run for 85% of rev range, Torque Max was 0.79ft-lbs lower BUT averaged 3 ft-lbs higher over 60% of range. There is no 'drag pipe' dip in the mid range.
S&S slip-ons work very well according to my dyno guy, but we are suprised at the amount of fuel that could be pulled out of the map for the bassani's. There will be a noticable difference in economy. I'm not an economy guy but found this interesting as open type pipes often get a bad rap for Torque and economy. On the other hand the slip-ons could get pretty close to the Bassani's in torque and horsepower with WAY less volume.
By the way, the slip-ons are for sale in the parts section.
Smash.
It had occured to me that fuel was coming out as the VE was down with the pro streets, but it is suprising that horsepower AND torque were higher, not just peak but also average. I've had these pipes on a couple of bikes and with proper dyno tuning, I don't see the soft bottom end numbers that many others are putting up with. I do believe that these pipes are suited to a bit more lift and duration though, which by default will lift the revs at which you end up riding. I agree that stock cams are not their strong point, however they worked better than the much more common slip-on's in this case. Time and time again I see people throw big cams and comp/headwork at their bike, then try and tool around town at 2000rpm, wondering where all their power went.
I'm not aiming this at you Scotty, I'm just thinking out loud. I'll try and post some dyno sheets after I'm finished with the cams and TB upgrades. Its on hold at the moment as I think I'll split the cases, true and pin the crank, and do a left side timken.
By the way, nice cam change thread.
Each To Their Own.
