I see that 90% of the forum members use the Superchips tuners... Yesterday I was given the opportunity to use a Hypertech Power Programmer III for free... I tuned my truck for 91 Octane, (but I'm still running 87) and I set the rev limiter +500rpms, and increased the top speed limiter to 128MPH... Now, I noticed that the truck runs much better, the exhaust flows better, and it gets up to speed easier... But when I floor the gas pedal, I'm really not blown away. There's definately a difference, but it's not as drastic as some others have made it out to be...

Would it be better with Superchips? Exponentially? Or is there something I'm missing. I do have the 20" tires... Should I run the higher octane gas to notice the most gains?

 

I know it sucks, but I run only 91 octane or better. I have the flashpaq and it says if you run anything lower than 91 when you have it tuned to that, you can develop a knock in your motor. But you will notice a difference with a high octane fuel.

 

Hypertech experienc:
I had slight pinging noise at WOT when I tuned to 91 octane and had 87/93 mix in the tank. but after another fill up of 93 no knocking or pinging. I love the way my truck runs now with the tuner.

 

I programmed my uncle's '03 HEMI with the Hypertech he bought and neither he nor I was impressed with the results. I found a deal on a Brute Force CAI and Superchips combo package so I bought it and prgrammed it into my '03 HEMI. Now that was a difference! I initially installed the program then a few days later installed the CAI. You could feel the power after both mods. I would definately go with Superchips over Hypertech. You have more flexibility with the Superchips also. If you use the towing or performance program, DO NOT USE ANYTHING LESS THAN 91 OCTANE! You will get pinging and it can hurt your engine.

 

More than likely our trucks have knock sensors in them, when you run 87 octane for a chip programed for 91 octane your not going to feel much of a difference because your engine computer is retarding the timing to make up for the poor octane fuel. Try running just 91 or better and report back..

 

...love my flashpaq....

 

I have the Flash Superchip!! I love the hell out of that thing. I only use 91 octane. I sometimes mix racing fuel with the 91 octane with great results.

 

I have actually been more pleased with the "87 Octane" program running 89 octane fuel than the "performance" program running 91 octane. I was noticing some knock at WOT when running 87 octane with the "87 Octane" program, so I bumped up to 89 and so far over the past couple of tanks....no knock. I'm guess the timing is advanced too much for 87 octane fuel even though it's supposed to be customized for it.

 

Can someone explain to me, why tuning for 87 octane (but running 91 octane) would produce better results, than tuning for 91 and running 91 octane?

 

Sounds like superchips is the way to go. Another twist... Does Edge make an evolution programmer for the Hemi? If so, any feed back on the Edge product?