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Originally Posted by demonfire
Bela - i'm going to add to your post that timing is not based on ECT or IAT, but rather, can be influenced by it. Timing is based (in my experience) on load and engine speed (RPM). So if your base timing at 80% load at 5k is 17degrees, if your IAT exceeds X (let's say 140degrees) the car will start to pull timing, same for the ECT if it exceeds Y (230?), so while if the car has a low IAT and lower ECT than the timing table says to pull, it will have 17, but could be as low as 10 (example). So when datalogging be sure to be aware that what you demand might not be what you get if you're running hot and / or heatsoaked.
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Actually that's not 100%
You can alter your timing based on ECT and IAT as well. Granted it's not in the main table but there are other tables that can add or subtract timing based on ECT and IAT's. So yes while ECT and IAT are not the main contributing factors, they are definately a basis for where your timing is.
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Originally Posted by sc0tty8
Someone should add the info of how much you mill to get what CR and what gasket to add to get what CR. I am going to need that info  |
Scotty, that's getting into Car Specifics and will differ per engine. Kind of a different story.