Ballast resistor is only used on the +ve side of the coil - but only (normally) with points based ign system. L-Jet rpm sense is from -ve side of coil, so should be no problem. L6 L-Jet systems (R30, 280ZX) used a HEI system with no ballast resistor and the rpm was sensed from coil -ve.
I'm a bit surprised that the Bluebird electronic ign has a ballast resistor - but I know bugger all about Bluebirds (and thinking about it, the early Chrysler EI systems had a ballast resistor). > Andrew Greenbury <[EMAIL PROTECTED]> wrote: > > Hi everyone, > > I have the bosch L Jetronic EFI setup for the 4cyl L series which > seems very similar to the common fuel injection on the 6 cylinder L > engines. The computer takes its engine speed signal from the negative > > coil terminal. I am using the bluebird electronic ignition, whereas > the > factory setup used a ballast resistor setup with the computer. I was > wondering if there is any chance the electronic ignition may damage > the computer with its higher voltage?? > > Thanks for any advice, > Andrew > > > --membersozdat------------------------------------------------------- > OZDAT Mailing List Please Note:- > Send (un)subscribe requests to [EMAIL PROTECTED] > Send submissions to [EMAIL PROTECTED] > No unauthorised redistribution of this email > http://www.ozdat.com/ozdatonline/index.htm > http://www.ozdat.com/ozdatonline/listindex.html > http://www.mail-archive.com/[EMAIL PROTECTED]/ > --------------------------------------------------------------------- --membersozdat------------------------------------------------------- OZDAT Mailing List Please Note:- Send (un)subscribe requests to [EMAIL PROTECTED] Send submissions to [EMAIL PROTECTED] No unauthorised redistribution of this email http://www.ozdat.com/ozdatonline/index.htm http://www.ozdat.com/ozdatonline/listindex.html http://www.mail-archive.com/[EMAIL PROTECTED]/ ---------------------------------------------------------------------
