Re: Before/after runs w/ EVO CAI (wolfsburg_de)
Hrm... You people are fast. I JUST finished posting those new graphs up.
Anyway couple of comments. I did some logs last night. Basically a few block 120s and one block 006 for temp. Results were VERY interesting. First of all, here were the conditions:
Ambient temp: 30 degrees Celcius
Wind chill: 26 degrees Celcius
Barometer: 30.21 and falling
Winds: 3mph N
Anyway if you look at the graph titled "evo_temp" and the curve "EVO2 (AT: 30F)", you can see how much difference the cold air made. Also manifold temp after idling the car for 10 minutes after the runs (hood closed the entire time) was 30 degrees Celcius- BIG
improvement from the previous day of 39 stock and 42 w/ the EVO. Seems the colder the ambient temp, the better the EVO CAI performs. In all fairness though, I don't know how the stock airbox would do under these conditions. At least when it comes to block 006's.
know however that peak torque as measured by the vag-com improved with the EVO on that night (see: "evo_torque"). It was marginal at best, but unequivocal. I've run on colder nights than last night with the stock airbox, and the best I've ever logged was 301.8 Nm or ~222.72 lb-ft torque. Last night however peak torque came in between 303.8 Nm (224.2 lb-ft) and 305.8 (225.68 lb-ft) for all 3 runs. Unfortunately though it's debatable whether the EVO made ANY sort of difference in terms of area under the curve.
Also I did some runs this afternoon with the driver-side front fender liner removed. My thinking was maybe improving airflow to the filter would improve results. BIG MISTAKE
. As you can see from all 3 graphs (evo_temp, evo_hp, evo_torque), removing the fenderliner was horrible for performance. The one graph I didn't bother to post for the mass air measurements also showed a big drop in flow w/ losses across the board and a 12 g/s drop at peak.
Oh and here's the conditions for those runs:
Ambient temp: 43
Wind chill: 34
Barometer: 30.01 and falling
Winds: 23mph S
[Modified by Jay24, 2:05 PM 2-12-2002]