KWIK
Enthusiast
There has been a lot of discussion about Mopar race calibrated engine controller....does it work? The following are two dyno runs on two Viper GTS, one a 1996 and one a 1999. Both were on the same dyno at Tom's Performance in Vancouver, WA. Dyno model 248c Chassis Dynomometer.
Car A belongs to Tony Cantafio....a 1996 GTS. Upgrades are:
K & N's smooth tube (KAX tubes)
1.7 roller rockers (Mopar)
Aluminum fly wheel
3:55 gears
KAX performance oil pan kit
Borla cat back exhaust
Car B belongs to Jay connelly...a 1999 GTS. Upgrades are:
K & N's smooth tubes (Mopar)
1.7 roller rockers (Mopar)
Hennessey cat back exhaust
I've only listed the upgrades that may change horsepower and torque from a stock Viper. Both cars were set up by me at Timberline Dodge.
Results:
Car A: (Tony's)
Barometric pressure 29.92 inches HG
Vapor pressure 0.30 inches HG
intake air temp 65.7 degrees F
Gear ratio 48 rpm/mph
Correction factor 0.97 SAE
With stock computer:
torque ft/lb 468.8
HP 435.9
With Mopar Computer
torque ft/lb 466.6
HP 426.3
Car B: (Jay's)
barometric pressure 29.56 inches HG
vapor pressure 0.13 inches HG
intake air temp 52.8 degrees F
gear ratio 42 rpm/mph
correction factor 0.97 SAE
With stock computer
torque ft/lb 476.7
HP 440.4
With Mopar computer
torque ft/lb 451.2
HP 417.0
As you can see both cars made more torque and HP on the stock computer. I called and talked to Mopar performance with these tests results. They said they had heard about problems, but these were the first dyno tests they had seen. They agreed the 50 HP and 25 ft/lbs torque did not hold up as advertised. Along with the idle problems, the computer is not doing its job.
My recommendation is to remove the performance computer and re-install your stock unit.
There are no plans at this time to make any changes to the computer by Mopar. I will be checking into the possiblity of a in the field reflash of the Mopar performance computer and will post more information when I have something to say about repair, replacement or a refund on your money.
Ken Klickman
Viper Tech
Timberline Dodge
Portland, OR
(503) 736-5183 (Direct Viper Line)
Car A belongs to Tony Cantafio....a 1996 GTS. Upgrades are:
K & N's smooth tube (KAX tubes)
1.7 roller rockers (Mopar)
Aluminum fly wheel
3:55 gears
KAX performance oil pan kit
Borla cat back exhaust
Car B belongs to Jay connelly...a 1999 GTS. Upgrades are:
K & N's smooth tubes (Mopar)
1.7 roller rockers (Mopar)
Hennessey cat back exhaust
I've only listed the upgrades that may change horsepower and torque from a stock Viper. Both cars were set up by me at Timberline Dodge.
Results:
Car A: (Tony's)
Barometric pressure 29.92 inches HG
Vapor pressure 0.30 inches HG
intake air temp 65.7 degrees F
Gear ratio 48 rpm/mph
Correction factor 0.97 SAE
With stock computer:
torque ft/lb 468.8
HP 435.9
With Mopar Computer
torque ft/lb 466.6
HP 426.3
Car B: (Jay's)
barometric pressure 29.56 inches HG
vapor pressure 0.13 inches HG
intake air temp 52.8 degrees F
gear ratio 42 rpm/mph
correction factor 0.97 SAE
With stock computer
torque ft/lb 476.7
HP 440.4
With Mopar computer
torque ft/lb 451.2
HP 417.0
As you can see both cars made more torque and HP on the stock computer. I called and talked to Mopar performance with these tests results. They said they had heard about problems, but these were the first dyno tests they had seen. They agreed the 50 HP and 25 ft/lbs torque did not hold up as advertised. Along with the idle problems, the computer is not doing its job.
My recommendation is to remove the performance computer and re-install your stock unit.
There are no plans at this time to make any changes to the computer by Mopar. I will be checking into the possiblity of a in the field reflash of the Mopar performance computer and will post more information when I have something to say about repair, replacement or a refund on your money.
Ken Klickman
Viper Tech
Timberline Dodge
Portland, OR
(503) 736-5183 (Direct Viper Line)