On The Dyno
Torque! It's that force that's felt in the seat of your pants when the clutch is popped and a boosted ‘Stang starts chugging forward, desperately trying to achieve traction. Historically, Two-Valve-powered Mustangs aren't known for having much torque. Yes, they're definitely screamers on the higher end of the rpm scale, but it isn't often that street-driven Ponies are able to traverse local boulevards at high revs.
Using Jorge Espinoza's Vortech-blown '03 GT, we conducted baseline Dynojet chassis-dyno tests and then performed an intake swap with Trick Flow's Street Burner manifold, at GTR High Performance in Rancho Cucamonga, California. As per usual with modular-engine performance upgrades that we do with GTR, necessary SCT tuning is handled remotely, with Ricardo Topete and Bob Kurgan of Kurgan Motorsports www.kurgan motorsports.com teaming up via Cyberspace to recalibrate the PCM in Jorge's beast.
As you can see in the dyno results, installing the Street Burner proved a winner for rear-wheel horsepower, but it also made a significant difference in the 'Stang's rear-wheel torque output, with the blown Two-Valve immediately building more torque at the beginning of the run. Per the data, while making peak torque nearly 400 rpm before the engine was able to with the stock manifold, the torque curve remains nearly 13 lb-ft greater (12.71 average) from 4,400 rpm throughout the entire 6,500-rpm band. In an otherwise-stock, daily driven Mustang on boost, having that kind of low-end muscle makes for really good times on the street or at the track.