Preliminary Intake Testing: Part 1 (Cobb)
I had said that I was going to do some preliminary testing on intakes, before hitting the dyno later this month. The Cobb intake has been installed for about a week now, and I have to say that it does feel quicker on the butt dyno. Not much added sound though, which was quite a surprise to me. It sounds only mildly louder that the OEM intake system.
When I had my original setup installed (Mishimoto induction tube and Cobb filter), I took numerous back-to-back runs, all in the same location, heading in the same direction, and all in relatively close ambient temperatures. I then installed the Cobb intake, and did the same back-to-back tests/logs. I probably took about 7-10 logs on each map, and pulled them all up in Virtual Dyno. You will always get some oddities where power is higher or lower than the others, so I really was looking for consistency to compare against. I was able to weed out the oddities, and come up with (2) baseline runs and (2) Cobb runs, which are both very very consistent and accurate (in my opinion).
Baseline run data (4th gear log):
Peak boost: 25.17 psi
Charge temps: 45*, increasing to 60* by redline
Mass airflow at 4,500 RPM: 19.95 lb/min
Mass airflow at 6,000 RPM: 21.71 lb/min
Peak mass airflow: 22.07 lb/min
Cobb run data (4th gear log):
Peak boost: 24.89 psi
Charge temps: 44*, increasing to 57* by redline
Mass airflow at 4,500 RPM: 19.91 lb/min
Mass airflow at 6,000 RPM: 21.69 lb/min
Peak mass airflow: 21.96 lb/min