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mgg · 01-22-2014

The only way a prom can be effectively calibrated is with the car that it will be going in is on the dyno. Off the shelf proms are nothing more than a guess as to what level of tune your particular car is in. Maybe you got lucky but beware of a lean running car even though quick will be a nightmare eventually. If the prom is not programmed with the car on the dyno you might as well be throwing darts. Someone like Haibeck who has experience with a large number of ZR-1s in different levels of tune has a better chance of having a generic prom that will work. Unless someone has extensive experience with a large quantity of LT-5s its a crap shoot. Just my opinion. Had a number of experiences that would support it. A track day might not be the best way to evaluate the HP of your car due to all the variables involved. Braking, how quickly one can get back to the accelerator can be more important than horsepower. The person who is on the gas earliest wins. A driver who can get on the gas 20ft. earlier than the other driver has a HUGE advantage. 20 ft. sounds like a big distance but at 70 mph it goes by very quickly. It would take approximately 100 hp advantage to make up that distance. We would teach this to students and they would be amazed at speed differential at the end of the straight after practicing slow in fast out . I am glad your car is running well and it sounds as if you were one of the few very fortunate ones. Just check your air /fuel ratio to make sure it is not too lean. I believe the drag strip would better evaluate your car with MPH numbers.

01-22-2014	#106
mgg Join Date: Aug 2009 Location: Hamilton, Va. Posts: 113	Re: Which Performance Chip do you have? The only way a prom can be effectively calibrated is with the car that it will be going in is on the dyno. Off the shelf proms are nothing more than a guess as to what level of tune your particular car is in. Maybe you got lucky but beware of a lean running car even though quick will be a nightmare eventually. If the prom is not programmed with the car on the dyno you might as well be throwing darts. Someone like Haibeck who has experience with a large number of ZR-1s in different levels of tune has a better chance of having a generic prom that will work. Unless someone has extensive experience with a large quantity of LT-5s its a crap shoot. Just my opinion. Had a number of experiences that would support it. A track day might not be the best way to evaluate the HP of your car due to all the variables involved. Braking, how quickly one can get back to the accelerator can be more important than horsepower. The person who is on the gas earliest wins. A driver who can get on the gas 20ft. earlier than the other driver has a HUGE advantage. 20 ft. sounds like a big distance but at 70 mph it goes by very quickly. It would take approximately 100 hp advantage to make up that distance. We would teach this to students and they would be amazed at speed differential at the end of the straight after practicing slow in fast out . I am glad your car is running well and it sounds as if you were one of the few very fortunate ones. Just check your air /fuel ratio to make sure it is not too lean. I believe the drag strip would better evaluate your car with MPH numbers.