Well i have put in 15 timed runs today. 5 runs on a dirty K&N filter, then 5 on a cleaned filter and stock intake box and then 5 runs with the PMAS installed.
Mods to my truck were prior to intake are:
4:56 Yukons gears
K&N drop in filter
Magnaflow side exit exhaust.
BDX Tuner with 5 Star Performance Tunes
Also note this truck sits on a 6 inch lift with 10 inch wide Fuel wheels wrapped in Toyo Open Country RT 35 X 12.5 x 20.
Runs were performed in 87 Performance/Tow Tune
I threw out the fastest and slowest runs of each 5 and took the average of the 3 runs. Most of the gains took place from 50 mph to 100 mph.
Note: ru

Dirty Airbox & K&N Cleaned K&N and Airbox PMAS Installed

0-10 .3 .3 .3 =
0-20 1.2 1.2 1.2 =
0-30 2.1 2.1 2.1 =
0-40 3.3 3.2 +.1 3.2 =
0-50 4.6 4.5 +.1 4.5 =
0-60 6.3 6.2 +.1 6.1 +.1
0-70 8.5 8.3 +.2 8.2 +.1
0-80 11.4 10.5 +.9 10.4 +.1
0-90 13.9 13.6 +.3 13.4 +.2
0-100 17.8 17.2 +.6 17.1 +.5

1/8 9.6 @ 74 mph 9.5 @ 74.5 9.4 @ 75.7 mph


Is this mod worth the money and gains. No not really but i think this intake would perform better with a Boss or ported 18 manifold and long tube headers then i can see the intake being beneficial. From the acceleration data you don't see gains until the higher speeds where airflow is more critical. With a higher flowing manifold and long tube headers this intake would see greater gains than the stock air intake.

 

 

just curious why you started 2 of the same basic thread?

 

I messed up on the first one the test was done with a dirty K&N and I was in 87 Performance tune.

 

I was making an attempt to keep all things on an even playing field so the results could be duplicated more easily. I put a lot of effort into this I even went out measured the distance and marked it. Do you know how hard it is to find a set distance thats at or near the same elevation for the distance i needed to measure. The results are about as real as one can expect, unless anyone has an incite as to the perfect way to launch this truck. IE: what mode, 2 wheel drive or 4 wheel high, traction on or off. stability trac on or off, and at what RPM to brake torque it before you release. I have over 40 runs in this truck at the same location and I have gotten the times down to that they are identical on run to run. Now when I run this tank of 87 out I will run some 93 octane full tank 34 gallons and see what times I can get with it. My guess I will only see improvements on the upper speeds from 60-100 mph.

 

Yes BADCON my truck with the mods stated