and what do I do with it??I have a predator and can adjust stuff,but I'm friggin clueless as to what the +15/-40% and all that means.+/-20%,,no clue about all this.

 

For timing, it means an adjustment range between 40 percent less than the default setting of a given parameter in a predator tune and 15 percent more than the default setting. For the fuel table it is from 20 percent less to 20 percent more than the default setting.

Of course you have to determine if you need to make adjustments.

 

Safe to say that if you ask, you should let somebody else tune it for you. get a canned tune or have one built and saved to your tuner so you can reinput it after trips to dealer.

 

mY THOUGHT'S exactly!!

 

Even the best tuners had to 'ask' one day long ago. Some people ask because they want to learn.

 

Maybe someone can provide a link to answers on a tuner site? Anyone?

 

Jesse

Here's a thread from the beginning of this year, and you can see that we had many questions and not many answers about the Predator. It's a long thread, but skim through the first several pages and when you get to about page 4 you'll start to see some interesting info about tweaking a tune.

Old & Long Predator Thread

Actually, I think the main I learned from all that was that the Predator is still a low-end tuning device. It does great at loading a generic "performance" tune into a stock or lightly modded car. Then you can tweak that tune a little bit to make it a little more precise for your mods.

A lot of the discussion in this thread is about "zeroing" the LTFT's and trying to get the PE right to adjust your WOT A/F ratio by getting the O2 sensor voltage to about .9v (which would be much better done with a wideband O2 sensor). You can also adjust some timing a bit, but it's hard when you're adjusting the timing by percentages when what you really need to adjust are degrees.

So, the Predator is a good handheld tuning device to load one of the tunes that's already stored in the unit by Diablo, or a custom tune from one of their tuners like Runnin' With The Devil. Then you can tweak it a little bit. Butt......It's not like any of the full-blown tuner software packages where you can really fine tune things and see more precisely the curves and slopes and adjust individual cells.

Bob