I saw mention in 80scool archives, of advancing the timing ~ 3 deg of the FZJ80 (in service mode, without ECU control), to get more power and better efficiency.
The logic of why it is a win-win situation, as far as I can tell, is that the timing is set very conservatively to avoid really bad gas from causing a knock condition, kicking in the large incremental jumps to retarded timing. In countries where gas is generally good, the timing can be bumped up a little.
My question is, has anyone in the US tried this, and have you noticed any changes? I'm skeptical that this is a completely beneficial thing to do, even with great-quality gas. Seems like it would increase EGT, throw the O2 sensors off, increase NOx or other bad emission gases, or in some other way have a detrimental effect.
Thanks,
kenton
The logic of why it is a win-win situation, as far as I can tell, is that the timing is set very conservatively to avoid really bad gas from causing a knock condition, kicking in the large incremental jumps to retarded timing. In countries where gas is generally good, the timing can be bumped up a little.
My question is, has anyone in the US tried this, and have you noticed any changes? I'm skeptical that this is a completely beneficial thing to do, even with great-quality gas. Seems like it would increase EGT, throw the O2 sensors off, increase NOx or other bad emission gases, or in some other way have a detrimental effect.
Thanks,
kenton