I have TFs on my 340
It likes 30 to 32 degrees total timing
I have tested it up to 36*, it fell off on power
Called Trick Flow and they said max 30 to 32 degrees.
I run 91 pump gas with 10.4 comp.
No detonation even at 36* it didn't ping.
But noticeable loss in power from 32*
Just my experience..
