Ecofx86

The way you tell the blinders are on.
Watch the knock senor bounce around 2.99 drop to 2.50 go back up.

At wot you sHound be riding zero knock.
If u do have knock.. It should immediately come back down.

Negative knock Means the truck is adding timing. If it stays negative their is power left in the table.

Snowflake

I've been reading this with interest. It seem that if tuner A can set how high he want the knock sensor to read no one will ever see a knock over we will say 3. Giving you a false sense of security. Tuner B says let's let it read 20 you data log and it shows 10 which would be way to high the he adjust it down close to 0.
This could and would explain why some tunes have audible knock only showing 1 or 2 in a data log while others have no audible know at 7.
All these tunes feel different at cruise so I think just cruising we should be watching where the timing is compared to stock. I have a stock data log I use for comparisons.

cbvet

Next time you talk to a tuner ask him about the positive knock giving more power, not saying high numbers just positive. I'm at 4 of them that have told me yes. And yes they have told me it's safe too and won't hurt.

Ecofx86

My tuner runs at zero. If there is positive knock ,he fixes it.

SkiSmuggs

KR is knock retard, a reading from the knock sensors. Positive numbers mean there is measurable knock and the tune is pulling timing to compensate. Negative numbers indicate absence of measurable knock and the tune adds timing for power and fuel mileage. Typically, the higher positive numbers are seen at cruise when the tune is trying to get the best mileage. KR should approach zero at WOT for safety. I've read that over +5 is bad. My SCT tune hasn't gone over +3.

SkiSmuggs

I never said MPT was garbage, just that, on my truck, it has much bigger KR swings than 5 Star, canned SCT, SSI or stock, so I am not comfortable with it. And my point all along has been that the OP needs to data log tunes or at least monitor with Torque Pro or another device so he knows what is going on. It comes down to each truck, strategy and tune having its own characteristics. Just because you have lots of negative KR (needs to add timing) doesn't mean the OP should take it on faith that he will have the same results. Data log it, period!

---Quote (Originally by MorePowerTuning)---
It's already been confirmed in previous posts, but I'll double confirm. On the Ecoboost positive knock is the pcm retarding spark advance. Negative is the pcm advancing it.

On older vehicles with lesser quality knock sensors any knock was a bad thing, with the advances we have now it's not as big of a deal.

That doesn't mean advance the timing as much as you want and the knock sensors will recover. It simply means they are really sensitive and will show knock activity frequently. When you retard the timing in the tune and find the point of no more knock you will see the sensors adding in timing back to a level where it was previously knocking.

Ecofx86

Highest I seen sct 93 oct tune. .. Right at beginning of wot ex 2.8 than down to zero rest of the way.

cbvet

I'm on revision 5 on mpt and it is weaker than any other mpt I've received and I'm still seeing 8 knock at times under light throttle, I decided 5 times is enough for me and I'll pass on mpt, if I go to the track again I may run it again just for the track but the tune won't stay in my truck for my normal tune, I do understand that you'll see your higher numbers under a load in 6th but I've never seen 8 knock on any other tune.

Snowflake

To long.