| So I was looking tonight through logs before DPs were installed and comparing them with logs after the installation. All runs were done with boost controller off with stock Sport 500 boost. Data was almost perfectly consistant among multiple runs before and multiple runs after where temperature had hardly any effect although it was always within about 15 F of each run. Unfortunately, I never redline these runs and always tend to let off the throttle around 6500 RPMs, so I'm not sure that represents peak power, but for comparison it is interesting. The DPs definately increased top end MAF readings. Before, MAF rnage between 4.40 and 4.43 at 6500 RPMs. After the DPs, MAF ranged between 4.5 and 4.54 with an average increase of 0.11 volts. Running these through the VQ table and then deviding by 65535 to come up with a percentage of max possible single POP rwhp and then multiplying that by the highest measured so far on a single pop yields a 29 rwhp increase. But the real interesting data is lower down in the RPM band. At 3300 RPMs, before the DPs, results were 2.41 volts before and 3.45 volts after. At 3800 RPMs, results were 3.08 volts before and 3.78 volts after. The former being a 132 - 41 = 91 rwhp increase and the latter (3800 RPMs) being an 83 rwhp increase. So adding the DPs had a *huge* effect on low end torque and a decent effect on peak hp. Obviously the turbos reaching full spoolup at 3300 RPMs vs 3800 RPMs (sport 500s) is why such a huge difference in airflow.
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