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Is there a speed limiter on my 1997 Z28? If so what speed???

What does it mean to Increase shift firmness???

What is EGR and what are the advantages of disabling it???

Advantages of disabling the air pump, Carbon canister codes, Rear O2 sensors, and A/c Codes????

 

Well you could take your car up past 100 mph to see if it has a limiter or you can just delete it weather you have it or not, it's not going to hurt anything.

Exactly how it sounds, it increases the firmness of the shifts in automatics, even under part throttle shifts.

If you have problems with your EGR, AIR or AC and are going to remove it then you would have them deleted in the tune. But otherwise there is really no hp gain by deleteing them.

If you have long tube headers then you can delete you rear O2 sensors and i would keep the carbon canister unless you are haveing problems with it.

It also depends on if your state has emmisions testing and how strict they are.

Just read through his site and search around here. There is plenty of great information.

 

If your speedo goes to 155 you don't have a governor. If the speedo only goes to 110, then you have the "speed limiter".

You had to have the optional ZR rated tires (instead of the lower speed rated R) to get the car without the governor. Had to do with lawsuit/liability I believe.