Warning: Check Your Timing Split!
01-21-2003, 11:02 PM
#1
Senior Member
Thread Starter
Join Date: Jul 2001
Location: oHIo
Posts: 273
I've always felt, reasoned and had experts agree that it's bad to have the trailing ignition fire before the leading. I believe this a PRIME engine popper when encountered at the right/enough times.
I just reviewed a map from a reputable mechanic. There were 22 incidents of negative split in his "tuned" map.
If you have a PFC and Datalogit, it's easy to check on the TRAILING screen. Click on the split checkbox.
CHECK YOUR MAPS!
I just reviewed a map from a reputable mechanic. There were 22 incidents of negative split in his "tuned" map.
If you have a PFC and Datalogit, it's easy to check on the TRAILING screen. Click on the split checkbox.
CHECK YOUR MAPS!
01-21-2003, 11:51 PM
#5
Super Moderator
Join Date: Jul 2001
Location: NJ
Posts: 17,839
i just recently figured out how read POWERFCESE 
to program a powerFC you take a base unit "r" and multiply by the number in the cell for instance of above
-14 x R = -14R
put in a number for R say 5
you get R= -70
that is how you read a PowerFC map and its correction factors :bigthumg:
to program a powerFC you take a base unit "r" and multiply by the number in the cell for instance of above
-14 x R = -14R
put in a number for R say 5
you get R= -70
that is how you read a PowerFC map and its correction factors :bigthumg:
01-22-2003, 12:00 AM
#6
Member
Join Date: Dec 2001
Posts: 98
Originally Posted by Badog' date='Jan 21 2003, 09:02 PM
I've always felt, reasoned and had experts agree that it's bad to have the trailing ignition fire before the leading. I believe this a PRIME engine popper when encountered at the right/enough times.
I just reviewed a map from a reputable mechanic. There were 22 incidents of negative split in his "tuned" map.
If you have a PFC and Datalogit, it's easy to check on the TRAILING screen. Click on the split checkbox.
CHECK YOUR MAPS!
I just reviewed a map from a reputable mechanic. There were 22 incidents of negative split in his "tuned" map.
If you have a PFC and Datalogit, it's easy to check on the TRAILING screen. Click on the split checkbox.
CHECK YOUR MAPS!
01-22-2003, 08:48 AM
#8
Senior Member
Join Date: May 2002
Location: south NJ
Posts: 465
is the PFC acurate enough to NOT fire the trailing before the leading in the case of all the 0 splits? just wondering. i am not familiar with the pfc... but from what i can make out, it looks as if the split actualy increases in the higher rpm/boost ranges. (if that is what they are). my question... in those areas, do you think it may be wiser to actualy decrease the split to make up for the higer speed of the motor? in some instances it looks as if the split is 15* after. the way i have mine set up in the haltech is that the split actualy is lower at the higher boost levels... lets debate the split a little bit here.