SGViperGTS
Enthusiast
Ben,
Did you ever do a dyno of your car with the hi-flow cats and the stock ecu? It seems likely that your gain of 7 hp and 10 ft-lbs was due to removing the stock cats, rather than any gain inherent in the Mopar ECU itself.
You might even make more power with the stock computer and the hi-flow cats. However, this brings up an interesting problem. Since you are getting a check engine light with the hi-flo cats, will your car really make less power (due to the check engine light)? Does anyone really have any data to prove that the cars go into some type of limp mode with the light on? Does the car run richer on the dyno's air fuel meter? I was under the impression that the check engine light is merely annoying, but doesn't really cause the computer to affect mixture or timing.
I've got a 2000 GTS and I'm about to install Borla 17113 headers and Sean Roe's hi-flow 3 in cats. He said that his cats haven't caused the check engine light to trip on the late model cars, so I'm hoping I won't have this problem. What type of hi-flow cats do you have?
Ben.
Did you ever do a dyno of your car with the hi-flow cats and the stock ecu? It seems likely that your gain of 7 hp and 10 ft-lbs was due to removing the stock cats, rather than any gain inherent in the Mopar ECU itself.
You might even make more power with the stock computer and the hi-flow cats. However, this brings up an interesting problem. Since you are getting a check engine light with the hi-flo cats, will your car really make less power (due to the check engine light)? Does anyone really have any data to prove that the cars go into some type of limp mode with the light on? Does the car run richer on the dyno's air fuel meter? I was under the impression that the check engine light is merely annoying, but doesn't really cause the computer to affect mixture or timing.
I've got a 2000 GTS and I'm about to install Borla 17113 headers and Sean Roe's hi-flow 3 in cats. He said that his cats haven't caused the check engine light to trip on the late model cars, so I'm hoping I won't have this problem. What type of hi-flow cats do you have?
Ben.