3rd Gen Firebird with LS1 Swap Hits the Dyno
Watch a 1983 Pontiac Firebird with an LS1 from a 4th gen car make a quick run on the rollers.
The 3rd generation Pontiac Firebird and Chevrolet Camaro are often slighted for being a bit short on power in stock form. Doubly-so when compared to the big-power GM muscle cars from the 2nd and 4th generation of each. However, the simplest solution to add a serious increase in power to a 3rd gen Firebird or Camaro is to swap in an LS1. This particular F-Body has done just that, and now it’s time to hit the dyno and see what it can do.
When the video begins, the 1983 Pontiac Firebird is already “rolling” on the dyno at low RPM. After a few seconds, the driver hits the throttle and the LS1 roars in the background. After 14 seconds of hard throttle, the run ends and the cameraman moves closer, giving us a quick glimpse of the engine bay. Afterwards we see the interior – which features the steering wheel and dash board from a 4th generation Firebird.
Next, the camera moves around to the front of the car, where we get a good look at the LS1 V8 tucked under the hood of this 1983 Firebird. It has a cold air intake and it appears to have headers, but it is hard to guess as to what else has been done to the engine before it was fitted into this 3rd gen Pontiac Firebird.
Finally, the video ends with a look at the dyno screen, which reads out corrected numbers of 372.3 rear wheel horsepower at 5,700rpm and 359.9lb-ft of rear wheel torque at 4,705rpm. Considering that a stock LS1 Firebird makes around 300 rear wheel horsepower, 372.3rwhp suggests that this LS1 has some work done to it – likely making this one quick 3rd gen Firebird.