Well, not really results but some interesting information. There were still gains made but not near the real potential of the porting.
Car is a 16 C7Z A8 with just an upper pulley. The CAI and the Exhaust is completely stock. Dyno testing was done in 5th gear.
The base line pulls yielded 178-180 KPA and the proper AFR. After the porting the pulls only yielded 168-170 KPA and the car is now .4 leaner. So we lost 2 lbs of boost (restriction) and it leaned the car out quite a bit. Now we know the blower is moving some air despite the stock CAI and Exhaust. There were still gains in the middle of up to 15rwhp. There was no tuning done to correct the AFR so I don't know what else was there power wise with the AFR regulated. Timing also wad not adjusted for the loss of boost so a couple degrees back in it there would make some power as well.
Once this car gets opened up with a CAI and exhaust and has the 2 lbs of boost back there will be some serious gains. This was an interesting and informative test in my opinion. I know with centrifugal S/C's you can pretty much count on 20/22rw per lb of boost. I am not sure what a lb of boost is worth on a PD blower.
From my stand point I am not sure if this is a worth while mod for a basically stock car just yet. I think we opened up the middle without giving it enough air from the front or letting enough out the back. That coupled with the loss of restriction now costing us some boost makes this a toss up as a beginner mod. Now if you have CAI/Headers and are going to pulley down or O/D the crank I think you will see some great gains. End all would be H/C/Ported blower for max gains.
Some more tuning should be done soon to get everything regulated. I will post up a re-evaluated test later.
