Ok, i have an 05 Daytona Ramgot it in May of 05. The only moddone was the SCthat my wife gotfor meon christmasof 05... now i cant remember if when i installed it the FIRST timei used the 89 or the Performance setting. Now i did take the truck in to the dealer 1 time for a problem i had with the wipers and before i took it in i changed the settings back to stock.... this was back in Feb or March of 06 after i got back from the dealer i re-installed the SC......... NOW...... after reading that post on how much of a difference there was in the PERFORMANCE setting i decided to give it a try. My tank was down to 1/4 of the 89 and i filled up with 93, (keep in mind this is the FIRST time my truck drank 93)when i got home i pluged the SC into the truck to change it to thePERFORMANCE setting..... clicked on VIEW SETTINGS..... and it was ALREADY on "PERFORMANCE" !!! So this means i was running on the PERFORMANCE setting for the last 14 months... almost a year and a halfon 89 octane !!! I know the manual says to use 91 or better but i had no idea it was even on that setting til now. So i guess i'll see if it runs any better on the 93 if i don't feel any difference i think i might just keep useing the 89 on the PERFORMANCE setting. Like i said it's been on that setting useing the 89 since late FEB of 06 and i've had not 1 problem, no pings, no NOTHING runs GREAT !!! I'll let you know if i feel any difference with the 93.

 

if thats the case you are lucky man. just this past week on dt a guy had an issue with the psiton crown breaking off and making shrapenal of the cylinder. sc advacnes timing and disables the knock sensor. so if you run lower octane on higher timing advacnes things get lean and mean fast. he had been running the performance tune with 87 and 93 mixed.

 

wow i can't believe you ran it like that and didnt have a single problem!

 

In my dakota I had the jet stage 2 that required 91, never did it, never had a problem. I wouldn't dream of doing that with my ram. The 91 or 93 will burn better, so you will get better performance. Make the change, save your truck.

 

I really hope that the SC programmer isn't disabling the knock sensor. No modern EFI engine can run "blindly" no matter what program it's got. Normal operation revolves around fine-tuning the timing with knock sensor feedback.

 

It doesn't disable the knock sensor, I think Daytona just got lucky.

 

There are knowledgeable people that will argue SC has disabled the knock sensors

 

So... I am an idiot?

 

Sorry, I was not calling you an idiot. I thought the subject was open for discussion. I was wrong! SC did not disable the Knock Sensors! They just completely zeroed out the surfaces within the calibration that retard the spark advance for a given inlet air temperature, hot or cold. They have also zeroed out the spark advance retard surface for hot coolant temperatures. Hopefully the knock sensors will be able to retard the spark advance enough to stop spark knock, if the inlet air temps and coolant temps get hot. Sorry if I offened. My info in not my own research. I am sharing from antoher forum posted by a DC Tech. I will never post on this site again. Sorry for all the miss information

 

Dude... I was just busting *****... don't get all upset. I am glad you got the right info though... it will benifit all of us.