tl;dr What is the right base ignition timing for a d16a6/y8 setup, and how much percentage fuel to I need to add to the p28 base map to avoid bad things happening with the 11:1 compression?
long version:
I've working with a d16a6/y8 mini me combination with an adjustable cam gear and I'm having a rough time figuring out exactly what is the correct cam position (no advance/retard).
I am starting out with the index marks on the cam gear lined up with the deck. The height is different on the two heads or something so the belt is off by half a tooth. I fixed this by just moving the cam ring over half a tooth, not actually moving the cam.
If I'm not mistaken, that should the cam where it needs to be and I shouldn't need to adjust the cam itself anymore should I?
Here is where my problem comes in. With the cam at that position my ignition timing is massively retarded. I would guess it's at maybe 8 or 12 degrees and no amount of advance on the distributor will get it much closer to the 16 degrees mark.
I also understand that since the y8 obd2 setup runs a knock sensor, it's base ignition timing is 12 instead of 16. I get all screwed up right about here. Do I need to move the cam to get the base ignition timing closer to the 16 degrees, or do I leave the cam alone and add 4 degrees to my timing maps in crome? Or is 12 degrees base timing just fine considering the 11:1 compression?
Also, as a side note, I'm wondering how much additional fuel I need to add as a base tune to avoid hurting anything. I was thinking maybe 5 or 10 percent added to the standard p28 base?
long version:
I've working with a d16a6/y8 mini me combination with an adjustable cam gear and I'm having a rough time figuring out exactly what is the correct cam position (no advance/retard).
I am starting out with the index marks on the cam gear lined up with the deck. The height is different on the two heads or something so the belt is off by half a tooth. I fixed this by just moving the cam ring over half a tooth, not actually moving the cam.
If I'm not mistaken, that should the cam where it needs to be and I shouldn't need to adjust the cam itself anymore should I?
Here is where my problem comes in. With the cam at that position my ignition timing is massively retarded. I would guess it's at maybe 8 or 12 degrees and no amount of advance on the distributor will get it much closer to the 16 degrees mark.
I also understand that since the y8 obd2 setup runs a knock sensor, it's base ignition timing is 12 instead of 16. I get all screwed up right about here. Do I need to move the cam to get the base ignition timing closer to the 16 degrees, or do I leave the cam alone and add 4 degrees to my timing maps in crome? Or is 12 degrees base timing just fine considering the 11:1 compression?
Also, as a side note, I'm wondering how much additional fuel I need to add as a base tune to avoid hurting anything. I was thinking maybe 5 or 10 percent added to the standard p28 base?