dom14
24th June 2015, 02:54 PM
Hi guys,
I've found below article which nicely explains the issue of dual fuel as well as special
ignition requirements for LPG.
http://www.acl.com.au/web/acl00056.nsf/0/359683e8a538a3e64a2566c0007bb33e?OpenDocument
Mine is a GQ RB30 carby model on dual fuel.
I drive on LPG most of the time.
So, if I can quote below paragraph from the above article,
["Ignition Switching Devices
The best way to be sure that the ignition is optimised for both fuels is to install an ignition switching device, known also as "Dual Curves". These units are wired into the ignition system and switch automatically to the LPG or petrol setting when the fuel switch is activated. They will give more initial advance than the petrol setting when the engine is running on LPG, and as speed increases they will give less advance than the petrol setting. Although these are usually pre-calibrated for a range of applications (i.e. not necessarily calibrated for a particular engine) they will give a much better approximation to the ignition requirements for engines being converted than the incorrect practice of merely altering the static timing."
Where can I get hold of those Dual curve units?
I'm particularly interested in a dual curve ignition unit that can adjust the ignition curve for LPG. By that I meant,if I follow the above article, more advance initially on low engine speed and less advance as the engine speed increases.
Thanks
I've found below article which nicely explains the issue of dual fuel as well as special
ignition requirements for LPG.
http://www.acl.com.au/web/acl00056.nsf/0/359683e8a538a3e64a2566c0007bb33e?OpenDocument
Mine is a GQ RB30 carby model on dual fuel.
I drive on LPG most of the time.
So, if I can quote below paragraph from the above article,
["Ignition Switching Devices
The best way to be sure that the ignition is optimised for both fuels is to install an ignition switching device, known also as "Dual Curves". These units are wired into the ignition system and switch automatically to the LPG or petrol setting when the fuel switch is activated. They will give more initial advance than the petrol setting when the engine is running on LPG, and as speed increases they will give less advance than the petrol setting. Although these are usually pre-calibrated for a range of applications (i.e. not necessarily calibrated for a particular engine) they will give a much better approximation to the ignition requirements for engines being converted than the incorrect practice of merely altering the static timing."
Where can I get hold of those Dual curve units?
I'm particularly interested in a dual curve ignition unit that can adjust the ignition curve for LPG. By that I meant,if I follow the above article, more advance initially on low engine speed and less advance as the engine speed increases.
Thanks