Detonation above 5000 at WOT with SCT X4 installed tune

[TrackpackGT]

I thought it was just my Carter custom tune, so I removed it and used the SCT standard tune. My car only has a drop in AFE and GT500 mufflers. It detonates above 5k at WOT, so I back off immediately. I guess I could try some top tier 93 octance, but I figured just running 93 octane would be enough. I did several data logs for my "tuner" to adjust his tune, but it still did it. Thanks for any help.

 

[JTS_7]

Had a similar issue long ago. Tried some Torco, went away. Switched to E85 (same tuner) never had the issue again.

I even went to brand new gas stations BP, Thortons, Shell, all 93 produced knock.

 

[TrackpackGT]

Sounds like it needs less timing up top or more fuel, or both. This is my daily driver, so E85 is out of the question. Thanks for the input though.

 

[JTS_7]

FWIW I have seen knock on a factory Ford tune, as have others.

How much timing is your tune pulling when you see knock activity?

 

[Weather Man]

You take what the local gas will give you, back off the timing.

 

[RIPN]

Please don't get gas from Thortons, probably the cheapest gas.

 

[JTS_7]

Please don't get gas from Thortons, probably the cheapest gas.

Their e85 has been spot on for quite sometime for my twin turbo car.

 

[TrackpackGT]

I'm not knowledgeable on how to look at my datalog numbers and make adjustments. I probably need to buddy up with someone in the Raleigh/Cary/Apex who does and bring my laptop along. I do know how to do some datalogs, but I did that last fall so it has been a while.