5.0 Tech Inspection - DNA 3-inch Race Series High Performance Mufflers
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While Ward (for now) intends to use his new DNA Performance Muffler/Fast Intentions exhaust setup primarily for keeping the noise down when moving the car around in his neighborhood (loading, unloading, etc) and when he goes out for eighth-mile test laps for 60-foot data. However, the runs we made on the Clayton chassis dyno at B&D Racing really opened his eyes to the improved performance (especially on the torque side) that his 'Stang might really gain if he dials-in a good tune with the exhaust system installed. Ward also learned about the importance of good air/fuel, and why investing in a wideband 02 sensor for his FAST engine-management system would be a good idea. We did not do any tuning whatsoever during our dyno session (our project was done with Ward just a few days away from competing in an NHRA points race and we did not want to disturb the engine's race program), and Ward's `Stang basically runs with a tune that has not been touched in five years (NHRA's Stock Eliminator competition can be thought of as bracket racing at its highest level, so consistency is critical for success). On the dyno, first with open exhaust, the stock 5.0 laid down a stout 272.9 horsepower and 284.2 lb-ft of torque at the rear wheels. We also noticed that the 302's air/fuel ratio stayed around 12.7-12.9 through the sweet spot of the rpm range, which is great for the stock-everything configuration of the engine. We then bolted-up the new, 3-inch exhaust pipes and DNA Gen II Race Series mufflers and tested again. In corked-up trim, the stock Mustang lost a bit of horsepower (265.9 hp) but gained rear-wheel torque, as we predicted it would, with 288.3 lb-ft. The addition of an exhaust system did richen the air/fuel mixture considerably (10.0), but we feel that a more-optimal ratio, and even more torque, can certainly be achieved with dyno tuning. View Related Article
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Ford E-250 Research
Get updated on all your car buying needs from safety features, to specs, to crash test ratings and options. Get all the information you need if you are interested in buying a new car like the Ford E-250. Fuel efficiency is important and the 2010 E-250 has fuel economy comparable to other cars in its class, and also comes with comparable safety features. The Ford Shelby GT500 and the Ford Mustang are other vehicles that might interest you.
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