Dyno Tested – Venom Race Controller
For our 2013-15 Dodge Viper fans, we finally got our hands on one of the Arrow Racing produced “Venom Race Control Modules” that was introduced in our previous story. This is basically a replacement PCM for the factory PCM, and takes about 10 minutes to install. You’ll have to get your local Dodge dealership to complete the installation, as it requires them to use their scan tool to set the odometer, VIN, and do an electronic throttle relearn procedure.
Noticeably, the car has an audible difference at idle. Likely due to the variable cam being altered to make the profile have more overlap between the intake and exhaust valves being open. It has a slight cam lope now. You know that louder, deep exhaust sound when you first start up your Gen 5 Viper? It sounds like that all the time now, it doesn’t get quiet once it warms up.
The factory computer has an rpm limit of 6,400 rpm. This Arrow unit adds another 200 rpm to that, totaling 6,600 rpm now. Performance-wise, the added 200 rpm at the top sure wakes things up! We had the opportunity to do some road course laps with the computer installed, it does seem to pull harder on the straights now. So, we went to KP Racing in Houston to verify what our seat-of-the-pants meter was telling us. We had done a few baseline dyno pulls on the car a couple months ago, so this dyno session would serve as a good before/after comparison. For those of you that seek more dyno machine information, this was a Mustang load-based dyno, and all numbers shown are SAE corrected. We even monitored the air/fuel ratio before and after, as well as the IAT intake temps, trying our best to keep things consistent.
The results were a little better than the +25 bhp advertised, as the module picked up about 29 rwhp (+33 bhp). The dyno graphs and the air/fuel ratio were similar to before, until about 4,400 rpm. Then the a/f ratio of the Venom controller was far more consistent and clean. This is what resulted in the gains from 5,000 rpm and higher. Peak torque output didn’t change much, only +4 ft lbs, but the range from 5,000-6,600 is greatly improved here. Right where it matters, in the racing powerband.
On the dyno sheet below, the red lines are the stock PCM, green lines are the Venom PCM. Notice the difference on that lower set of lines, those are the air/fuel ratio curves. The Venom does a better job at remaining consistent through the rpm range.
Thanks to Woodhouse Dodge for getting us the Venom module, and thanks to Tomball Dodge for doing the installation for us. Overall, we are pleased for this relatively easy bang-for-the-buck and keeping the factory drivability and reliability.