Originally Posted by PhilM
Hmm, would ACTs have that much of an effect? I'd not ahve though you'd need to alter CR for it!!!.
Essentially a high ACT means less oxygen/unit. Therefore you'd just adjust the fueling to suit (so you retain your desired AF ratio), why would you need to go low comp??
*Probably missing a point here!*
High ACT's over about 35-40 deg C may cause induce conditions that induce det !
But it depends completely on the sum of the total spec of the engine.
(I.E Every engine is different !!)