Merry Christmas and Happy Holidays, everyone! I've spent several hours post processing this data since yesterday, so be forewarned: long post ahead!
Round 2 of dyno pulls was completed yesterday (12/23/16) at Endless Autosport in West Allis, WI. Dyno was a linked Mustang load based dynamometer. All runs were completed with the exact same hardware and tank of 93 octane (winter blend) fuel. All pulls were completed in third gear. Hood was left up. No adjustments to the straps were made from start to finish. Target pull RPM range was 2000-6000.
Pulls were made in the following order: 1) AJP 93R7, 2) AJP 87R3, 3) Unleashed 87R1, 4) OE 3Bar. For each of the tunes, two pulls were made back to back, then the truck was shut down to cool for 10 minutes and two more back to back pulls were made. Ten minute cool times were allowed while switching tunes, then the process was repeated.
I re-ran the OE tune (very slightly modified) due to the hardware changes and time since previous baseline pulls. The only modifications to the OE tune was to allow the use of the 3 bar map and also disable downshifting in manual mode. Spark, fuel and boost were all stock.
CONFIGURATION/HARDWARE (SAME FOR ALL 12/23/16 DYNO RUNS)
Start Mileage 35,578 mi
93 octane top tier fuel (winter blend)
Tire Pressure @ 35 PSI (All)
AEM DryFlow Drop-in Air Filter Installed @ 32,400 mi
RAT Stat 170 Degree Thermostat Installed @ 32,400 mi
NGK 6510 Plugs (1 step cooler) Installed @ 32,400 mi
3-Bar MAP Installed @ 32,400 mi
AJP Turbo Boost Regulator Installed @ 34,675 mi
MISCELLANEOUS
Amsoil 5W30 Oil/MC Filter Changed @ 32,770 mi
Amsoil Trans/PTU Fluid Changed @ 29,948 mi
Amsoil RDU Fluid Changed @ 32,912 mi
Amsoil Dominator Coolant Boost Added @ 32,400 mi
Rx Monster OCC Installed @ 30,434 mi
CAC Block Off Plate Removed @ 30,434 mi
BOV VTA @ 30,434 mi
Now, onto the results! Here is a summary of what’s contained below.
Figure 1: OE 3-Bar Tune, 4 pulls plus average of 4 pulls (black lines)
Figure 2: Unleashed 87R1, 4 pulls plus average of 4 pulls (black lines)
Figure 3: AJP Turbo 87R3, 4 pulls plus average of 4 pulls (black lines)
Figure 4: AJP Turbo 93R7, 4 pulls plus average of 4 pulls (black lines)
Figure 5: Overall Tune Comparison, average HP/TQ from Figures 1-4
Figure 6: Total Power Comparison, Area Chart
Figure 7: Total Power Comparison, % change from stock by RPM range
I haven’t had a chance to go through every single data log for each pull, but I checked some temps for the second set of back to back runs for both the first tune (AJP 93) and last tune (OE 3bar) and temps seem reasonably close considering 20 or so pulls. Ambient temps were as measured by the vehicle (inside the shop).
Beginning Temps (*F) – AJP 93 Pulls
Ambient: 42
IAT2: 93-122
CHT: 184-207
Ending Temps (*F) – OE 3Bar Pulls
Ambient: 50 ambient
IAT2: 98-130
CHT: 192-217
Figure 1: OE 3-Bar Tune, 4 pulls plus average of 4 pulls (black lines)
Figure 2: Unleashed 87R1, 4 pulls plus average of 4 pulls (black lines)
Figure 3: AJP Turbo 87R3, 4 pulls plus average of 4 pulls (black lines)
Figure 4: AJP Turbo 93R7, 4 pulls plus average of 4 pulls (black lines)
Figure 5: Overall Tune Comparison, average HP/TQ from Figures 1-4
Figure 6: Total Power Comparison, Area Chart
A better way to compare overall power is to look at the area under the HP curve. I used this to compare the overall relative power between each of the four tunes over set RPM ranges.
EDIT (12/29/16): Updated area chart to show entire RPM range of dyno pulls.
Figure 7: Total Power Comparison, % change from stock by RPM range
I applied the Trapezoid Rule (10 RPM increments) on the data used to generate the curves for Figure 6 and calculated the total power for each tune (relative to the OE tune) for the RPM ranges shown in the chart below.
EDIT (12/29/16): Added total power comparison across entire RPM range of dyno pulls (green bars); omitted Unleashed tune for 2140-5940 RPM range, since WOT was not achieved until 3000 RPM.
PEAK VALUES (take with a huge grain of salt – see observations and conclusions)
My observations and conclusions:
I was little surprised at the peak HP numbers, especially considering the monster torque gains, but look how much higher the HP runs on the AJP tunes through most of the RPM range.
I did some nerdsmithing of the data and calculated Total Power, since this is a little more telling over the entire RPM band. Figure 6 is a chart to help visualize the areas under the curve. To be fair with the analysis for the Unleashed tune (since we were having downshifting issues during pulls), I set the bottom RPM cutoff at 3500 RPM and analyzed up to 5940 RPM. On the first set of pulls we did, the RPM settings at the top end were too low so it stopped logging a little early. I clipped the top end of the comparison at 5940 RPM, so everything was same-same.
In Figure 6, note the 4300RPM vertical marker. Looking back at my 0-90 MPH data logs, this is the lowest RPM I dropped to during 1>2 and 2>3 shifts under WOT.
My interpretation is that the AJP 87 tune would probably be a touch faster than the Unleashed 87 tune in the 1/4 mile. As you can see in Figure 7, they are both pretty similar above 4300RPM, but the AJP 87 tune makes more power lower in the RPM range. The AJP 87 tune at the high RPM cutoff starts tapering off a tad faster than the Unleashed, so if I extrapolated the data, say from 4300-6200 RPM, the Unleashed might be a touch better there, but with the increased lower end power, I think the AJP 87 tune would come out ahead at the end in a 1/4 mile match-up. The Unleashed tune likely would have a slight edge with a 60+ MPH roll-on race.
While the two 87 tunes might be fairly close in the 1/4 mile, in my opinion, the AJP 87 tune is definitely better as a general all-purpose driver, as the 87 AJP tune makes better overall power throughout the RPM range. And check out the Figure 7 gains for the 93 tune! Dag yo!!! :mj_banana:
Oh yeah, and the AJP tunes still utilize TORQUE MANAGEMENT for drivetrain longevity.
EDIT: Added peak summary table as image due to formatting issues with entered text.
