Dyno tuned my Paxton '06 Viper coupe today
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Dyno tuned my Paxton '06 Viper coupe today
I had the guys at Late Model Racecraft in Houston ( LateModelRacecraft.com ) do a dyno tune on my '06 Viper today.
Modifications:
Paxton supercharger with stock pulley and Split-Second (8.5 psi boost)
Custom 3" exhaust with high-flow cats (stock exhaust manifolds)
Computer tuning via SCT XCalibrator 2 tuner module and custom tuning software
Prior to tuning, the lower rpm was very lean and the throttle response was crappy. The engine did not rev smoothly in the midrange. This could also be felt when running the car hard. The custom tune added fuel in the lower rpm range, and added more timing at the higher rpm range. The result is now better drivability, smoother revving throughout the rpm range, and better throttle response at all rpm. It feels like a different car now, I'm pleased.
Video: http://www.youtube.com/watch?v=SSEz5eVoa-U
Next up, they will be pulling the engine out and building it to handle more boost. Plans call for forged pistons and rods, stock crank, and billet mains. I'd like to get 850-900 rwhp out of the Paxton. The engine will be built to handle 1200+ rwhp, just in case I decide to go twin turbos later on.
Tony
Modifications:
Paxton supercharger with stock pulley and Split-Second (8.5 psi boost)
Custom 3" exhaust with high-flow cats (stock exhaust manifolds)
Computer tuning via SCT XCalibrator 2 tuner module and custom tuning software
Prior to tuning, the lower rpm was very lean and the throttle response was crappy. The engine did not rev smoothly in the midrange. This could also be felt when running the car hard. The custom tune added fuel in the lower rpm range, and added more timing at the higher rpm range. The result is now better drivability, smoother revving throughout the rpm range, and better throttle response at all rpm. It feels like a different car now, I'm pleased.
Video: http://www.youtube.com/watch?v=SSEz5eVoa-U
Next up, they will be pulling the engine out and building it to handle more boost. Plans call for forged pistons and rods, stock crank, and billet mains. I'd like to get 850-900 rwhp out of the Paxton. The engine will be built to handle 1200+ rwhp, just in case I decide to go twin turbos later on.
Tony
Last edited by GT3 Chuck; Sep 19, 2009 at 10:47 AM. Reason: embedded link
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07Speed, the car has the stock gears. 3.08 if I remember correctly. Tires are Nitto Invo, 345 wide 20".
It previously went 11.20 @ 135 on the 20" wheels/tires. No traction until 3rd gear, and this was prior to the tune. I have a new set of drag radials, but need some 18" wheels to mount them on. Then I'll head back to the track. I'm guessing easy mid-10s at 138 mph.
It previously went 11.20 @ 135 on the 20" wheels/tires. No traction until 3rd gear, and this was prior to the tune. I have a new set of drag radials, but need some 18" wheels to mount them on. Then I'll head back to the track. I'm guessing easy mid-10s at 138 mph.
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