The dual tuning is nothing new or invented. The pcm has two tables, the low octane and the high octane table. For those who use the high octane gas, you can benefit from having two high octane tables, this is accomplished by copying the hi to the low. For those who run low octane, both tables are alterered for better performance, but you're not paying for "daul tuning" it's already built in. The tuner is just making sure you'll notice a performance increase whether you're running good or The pcm will switch between the two tables based on how much detonation is detected. Keep in mind the pcm is not "dual tuned" there's not such thing, lol, all it is , there are two tables, one protects you from detonating your engine to death and the other is used when no detonation is detected. bad gas.just some info

 

Good info!!!

 

Yes, you're absolutely right.

When someone gets a tune, most of the time if the tuner is good, he will modify both octane tables. The tables are for low and high octane fuel.
When the pcm detects excessive knock it will turn to the lower octane table for its values. If there are no signs of knock/detonation, it will use the high octane table.
This is built into the pcm already.
When someone orders a pcm and wants an aggressive tune (such as yours) I'll copy the modified high octane table to the low one. This will ensure you are getting max timing.
This sounds as if there's no protection and the engine will knock. If you're always running high grade fuel that is not a problem.
I guess you could spice up the terms and say you tune for multiple octane levels, but it's actually already there. Tuners just mod both hi and low tables to increase performance regardless of what table your pcm is using.
I guess I offer dual octane tuning, lol.

later,

allen

 

So on a dual table or aggressive tune I should say, you would need to run High Octane on both? Is the aggressive tune the same for both tables? Just trying to get a pic of it, thats all.

 

A couple of years ago, when LS1 Edit first hit the market, I downloaded the my hypertech's power tuning. They had both tables set as the same timing value, and included a warning not ro run anything under 91 octane.

That being said, I still run a split octane table. However I have both of them pumped up, with the low just a couple of degrees less than the high. Even though I want peak performance, fact is some gasoline isn't very good. I can tell when I buy some crap gas.