So how is having a J&S system that will for example pull a degree or two out of a couple cylinders knocking so that total timing for each cylinder looks like 34-32-33-34-34-34 to stop any knock
Or instead, having that indicator I was talking about showing I have knock at a flat total timing of 34 then retracting them all to 32 until any knock goes away.

Is that extra 2 degrees per cylinder really worth it?
This same question applies for the MSD BTM box.

Why does any of it matter as long as your total timing is going to be the same at WOT under boost?

Isn't there a general rule of thumb to get you in the ball park on turbo timing? like start at 35 degrees total and take 1 degree out for every psi over 3psi or something?

Last edited by snowman4839; 05/18/14 10:41 PM.

69 Buick Special Deluxe. Intercooled Turbo Chevy 250 @ 15psi on a stock long block. It's kinda fast.