Justin@VMP
January 28th, 2007, 09:55 PM
http://www.vmptuning.com/dynographs/rickjan.jpg
Rick has an 04 cobra vert with a KN CAI (basically a cone filter and heat shield before the maf) and a catback exhaust. The car appears to have a stock supercharger pulley, with the pulley cover still intact. The lower is also stock. He bought the car used, when the cobras first came out people were swapping on the slightly larger Lightning pulley to pick up boost. I have to wonder if that was done to this car, as it makes great power and slightly more boost compared to other stock cobras. However, the higher boost could also be explained by the high barometric pressure that day, 30.3 as measured by the dyno electronics.
Regardless, these are great stock and tuned #s for a car with so little boost.
By tuning the car I was able to straighten out the air fuel and get him some more power. Ford runs the cars lean at low RPMs, by adding fuel we can actually pick up power in the 1000-2500rpm range.
You can see around 6200-6300rpm the graph begins to "break up", the car most likely needs a fresh set of plugs. Most 4vs will do this above 6300-6500rpm, but this car is particuarly bad.
Rick has an 04 cobra vert with a KN CAI (basically a cone filter and heat shield before the maf) and a catback exhaust. The car appears to have a stock supercharger pulley, with the pulley cover still intact. The lower is also stock. He bought the car used, when the cobras first came out people were swapping on the slightly larger Lightning pulley to pick up boost. I have to wonder if that was done to this car, as it makes great power and slightly more boost compared to other stock cobras. However, the higher boost could also be explained by the high barometric pressure that day, 30.3 as measured by the dyno electronics.
Regardless, these are great stock and tuned #s for a car with so little boost.
By tuning the car I was able to straighten out the air fuel and get him some more power. Ford runs the cars lean at low RPMs, by adding fuel we can actually pick up power in the 1000-2500rpm range.
You can see around 6200-6300rpm the graph begins to "break up", the car most likely needs a fresh set of plugs. Most 4vs will do this above 6300-6500rpm, but this car is particuarly bad.