Can i get a count who uses the 91 perf. tune & 93 perf. tune w/ 3 degree advance timing.
Which one is truely better (more power)?
Any problems w/ pinging, fan, no throttle, etc.
I currently have the 91 perf. tune w/ wot restriction disabled, raised rev & speed limiter. I am impressed with it. Just seeing if can get even more out of the tuner.
I realized that everywhere i live the gas stations sell 93 octane.
Here is the deal, EVEN with the 2 - 3 degree timing advance I don't think that anyone ever needs to use premium gas.
Higher octane fuel prevents detonation and is not as "volatile." It is usually used in high compression applications, usually MORE than 10.5 - 1 ratios. Even most 10 - 10.5 -1 ratios can use regular pump gas rather than premium.
I have a cortex tuner and I have no fear or concerns running the 87 performance tune with a 2 degree advance.
In fact, until summertime comes, I'm TEMPTED (haven't done it yet) to run the 85 octane fuel in the truck but cut back the advance to 1 degree. The only time you should ever consider cutting the timing back, or even remotely considering premium is when the outside ambient air temperature is near or over 100 degrees. I lived in Arizona for a long time so there it might make some sense to run premium in the summer to prevent any detonation.
Also, as a sidenote, the 2nd Gen Frontiers (and probably the 1sts, I haven't checked) ALL have detonation retard built-in so that if the engine detects any detonation it will automatically retard the timing to protect the engine.
If you're looking for power then work on the exhaust first. And I don't necessarily mean an aftermarket setup. I have seen absolutely AMAZING results with my custom setup. I'm not even sure there is much of a need for headers. The primary cats have a 2 3/8 outlet but they are piped to a 2" pipe. What a waste!
SEE WHAT I DID HERE:
Click on the pictures to enlarge them. You can probably have something similar done at nearly any exhaust shop for much MUCH less than what I paid.
The results WITH a Cold Air Intake are VERY good. I'm thrilled and after several months of testing it out I'm now going to go to the next level.
I'm now going to go with 3" pipe and a 3" muffler from the Y back. That 3" pipe will then flow well because the cross - section will be at least 80% of the two custom pipes there now...
Here is a thread about making power and a LOT of the basics that most folks don't know.