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Its combination of dual plugs and the valve angle, when my uncle(purpleram) & the others involved with the "new hemi project" back in late 99 the idea for the combustion chamber and valve angle cam...

BINGoooooo


Remember the values in these tables are ATDC is -XX and BTDC is XX
I always start with 8-10* in the idle areas on the PT spark table, and the Minimum spark table I set to 6* in...

post the tune if you can,

check to see if the neural network is still active , I find the 10-12's run better with out it on.

when my 2019 1320 wouldn't crank it was the dam anti theft .

Bingo , and some of it is also Intake manifold air boundary issue

If you search in this section "Texas Speed Stage" you'll find some good threads that'll help , I know it's not what you're asking but it'll lay some ground work to get the idea.

Seriously...

PurpleRam is off playing with Team Aston Martian.

I'll assume your running a RFE65 ? if so Look in the trans section there's a good right up on how to tune a RFE65.
get some gear in to it 4.10/4.56 , I currently run 4.88s in my 12 , RPM is KING...

26 is about the max, some of it depends on elevation, closer to see level, and dry air 28 is max and very rarely shows any gain over 24-26
cam Motion stick GRIND# XA227/375-XA235/375-13.5+3
I've...