I got my Banks CAI in today. Meyers Performance was great. I think I ordered it and it was here the next day. Im going to make a short story long.... Like I said I was going to run some Fuel numbers and this is what I found... I want my money back for the intake. Let me explain.
I ran numerous runs on the same route, with the same route, same speed, same temp, same winds, and same gas tank. I used the DIC to compare differences. I realize It is not accurate but It does tell me if one run is better than another.
35.4 inch tires with uncorrected speedometer. I believe it is 8.9 % off. So these mpg are all uncorrected for tire size.
1st run, I accelerated to 70 then set the cruise control. STOCK results 17.9 mpg
2nd run opposite direction 75 mph, NO cruise control. 15.8 mpg
(I have never gotten numbers this good. I believed it was the diesel fuel I just filled up on today.) I later discard these numbers
Now I went and installed the Banks CAI intake
Results with same conditions except 4 degrees cooler which should result in better performance.
Run 1 W/ Banks at 70 mph cruise control on was 15.8 mpg.... This was worse than my first stock run.
My return route w/ Banks at 75 and no cruise control was 14.9 mpg.... also worse.
Well I was frustrated, so i took the Banks out and re installed the stock intake.
I run multiple runs stock. To save you the confusion I will just post all my numbers.
Stock, first run, I completely discarded but it was 17.9 mpg at 70 and 15.8 mpg at 75.
Banks CAI 70 mph Cruise Control on - 16.9 (second run) (1st run I hit traffic and had to abort)
Banks CAI 75 mph w/ no cruise control - 14.9 (second run)
STOCK 70 mph Cruise Control on - 15.8 (1st run) and 17.3 mpg (second run)
STOCK 75 mph w/ no cruise control 14.8 (1st run) and 14.9 mpg (second run)
Here is my conclusion. I did two runs out and back on each test, Stock and Banks CAI. My second run was slightly better each time. Could be one of two reasons 1) Transmission warmed up or 2) tires warmed up and pressure increased 4 psi.
Regardless, if we compare second runs the stock was 17.3 vs Banks 16.9 at 70 mph and 14.9 with stock compared to 14.9 with Banks at 75 mph. Basically the same!!!
One thing I noticed was the engineers a GM utilized the "ram air" coming up through the fender wheel well better. It looked like, in my opinion, the channeling of air in the stock system was providing more positive air pressure than the Banks. The Banks filter was superior but the air seemed like it would be more disturbed and did not line up with the holes in the wheel well at all. My stock filter has 39000 miles on it.
Not sure what Im going to do at this point but if someone out there makes a higher flowing filter for the stock set up I will probably got that route. Assuming I can return the Banks CAI.
By the way, I think I replaced the system in under 25 minutes the second time. Very easy to install.
UPDATE after I wrote this I was informed the ECM does the fuel calculations on the DIC as opposed to a fuel flow rate attached directly to the fuel line. With that said I have no idea what the DIC is calculation and further calculations will be hand calculated
Black 2011 GMC HD2500 Danali. H&S XT Pro, 5" MBRP, Banks Intake, Line-X, Weathertech, Procomp 6" Lift, Chrome 20" BMF Novakane wheels, Nitto Trail Grappler 295/65/20 tires, BAKFlip, Clear Braw, H&S XRT Pro,
MBRP 5' complete exhaust,
Last edited by bss; 11-23-2012 at 10:25 AM.
Reason: Research show is was incorrect