When asking for technical help at the very least let us know the version of firmware you are running.Cliff's Calibration (Mapping) Guide is a MUST READ: http://www.vemssupport.com/forum/index.php/topic,97.0.html
Beauty of JBperf board is no PWMing. So no noise.
Quote from: GintsK on July 03, 2009, 12:43:18 amBeauty of JBperf board is no PWMing. So no noise.nope, that board is PWM.
No PWMing. You can read about IC used on this boards here: http://www.national.com/ds/LM/LM1949.pdfagain my offtopic. Using this JBperf boards yesterday I was able idling at 850rpm or even lower with 5x2300cc low-z. E85. And AFR - stable 1.0!! Audi 20VT.
Quote from: GintsK on July 05, 2009, 03:18:50 pmNo PWMing. You can read about IC used on this boards here: http://www.national.com/ds/LM/LM1949.pdfagain my offtopic. Using this JBperf boards yesterday I was able idling at 850rpm or even lower with 5x2300cc low-z. E85. And AFR - stable 1.0!! Audi 20VT.Loock again http://www.national.com/ds/LM/LM1949.pdf page 10, figure 6 . It's pwm to hold 1A thru injector.
Quote from: MWfire on July 05, 2009, 11:15:10 pmQuote from: GintsK on July 05, 2009, 03:18:50 pmNo PWMing. You can read about IC used on this boards here: http://www.national.com/ds/LM/LM1949.pdfagain my offtopic. Using this JBperf boards yesterday I was able idling at 850rpm or even lower with 5x2300cc low-z. E85. And AFR - stable 1.0!! Audi 20VT.Loock again http://www.national.com/ds/LM/LM1949.pdf page 10, figure 6 . It's pwm to hold 1A thru injector.May be I don't understand correctly? IMO in separate chapter on page 9 described special case how to use LM1949 for reducing heat but with radio noise (RFI) as result of PWMing. Fig 6 on page 10 relates to this special case. Normal mode switching diagramms is on page 7.Additonally on first page we can read: no RFI radiation!