I have a 2001 Z28 6 speed Camaro. The mods made to date are: MTI induction system, Flowmaster exhaust, 160 thermostat, Hypertech power programer III. The hypertech was the last mod. at which point the car was put on a dyno and put out 314 hp at 5700 rpm and 339 ft'lbs torque at 4000 rpm with the air temp 82*. On hot days >90* when i accelerate hard at about 5000 rpm i get a slight ping. The odd thing is that the ping isn't consistant in all gears. It seems to be more pronounced in second gear. I run 93 octane and am getting ready to switch to Sunoco 94 to see if that will help. Any feed back on how to correct this is greatly appreciated.

 

If the 94 octane doesn’t help then I would try removing the power tuning part of the HPP3.

 

I have the same problem. It was bad at first, but I called Hypertech and they had me send it back and they reprogrammed it to take a little timing out of it. It is better now - except on very hot humid days.

The biggest problem is the heat!! In the summer heat, I take out the power tuning for everyday driving and put it back in for the track. I also switched to NGK TR-6 (one step colder) plugs and I throw in a bottle of 104+ to race. This seems to work up to about 90F temps. At high temps, I don't bother racing - the times are way down any way, so why wear out the car.

Sunoco 94 did not work for me - I was told they raise their octane by adding alcohol - Hypertech recommends Amoco 93, and that is what I stick with.

If you call Hypertech and talk to them, they will probably reprogram it to take out a little timing - it is not doing you any good if you are detonating and you WILL destroy your motor!