Who runs the J68 chip? How does it compare to the J69 and J49? I'm curious because my chip is on it's way and i was expecting the J49 and JDM sent the J68. They said, "just be careful of detonation"....

 

i tired the j69 with my truck and 92 octane, too much dentanation, so i went to the j49

 

I'm just trying to figure out why Jim at JDM would recommend me running the J68?.?.? I spoke with Justin earlier and he said the J49 would be the best choice, then i call later to find out they just shipped me the J68.

I'm just trying to figure out the reasoning, i wasn't able to talk to Jim about it.

 

I have the j68 and it runs great with 93..I would just try it,see if it pings..

 

Am i understanding correctly that the higher the number the more aggresive? Meaning, J49 is not that aggressive on up to the most aggressive J70 (or whatever it may be)?

 

How do I know which program my chip is? Man do I look stupid now!

 

It actually says it on the chip on a white sticker. There are a few numbers/letters that designate which it is, but the "J49" or whatever is what you're looking for.

 

Thanks!