Advance timing (ground in)
#2
advance moves the valve opening/closing events toward the exhaust side of top dead center. this tends to give lower peaks for torque/HP. More directly, the 2 deg would shift when the intake valve would close, the most important factor in peak position relative to RPM. this would also affect dynamic compression.
2 deg, according to the knowledge that I have seen on the boards, lowers these peaks around 100 rpm.
not a dramatic change, probably inperceptible.
2 deg, according to the knowledge that I have seen on the boards, lowers these peaks around 100 rpm.
not a dramatic change, probably inperceptible.
#5
TECH Senior Member
Originally Posted by danf1000
advance moves the valve opening/closing events toward the exhaust side of top dead center. this tends to give lower peaks for torque/HP. More directly, the 2 deg would shift when the intake valve would close, the most important factor in peak position relative to RPM. this would also affect dynamic compression.
2 deg, according to the knowledge that I have seen on the boards, lowers these peaks around 100 rpm.
not a dramatic change, probably inperceptible.
2 deg, according to the knowledge that I have seen on the boards, lowers these peaks around 100 rpm.
not a dramatic change, probably inperceptible.
#7
TECH Senior Member
If you want to bring the band down a bit that could mean 100>200 rpm lower.
Like the difference between shifting at 6700 or 6500, trq will peak a bit sooner too cam will not carry as far after peak
Like the difference between shifting at 6700 or 6500, trq will peak a bit sooner too cam will not carry as far after peak