JFB Posted June 26, 2020 Report Share Posted June 26, 2020 Hi. 1995 Miata 1.8L, Fastforward supercharger. Link G3/G4 ECU with Mazda adaptalink. 4x 14 ohm 550cc injectors. Need to add 5th injector for cooling in intake manifold between supercharger and engine block. How do I got about controlling that 5th injector? Is it via the auxiliary injection? The 5th injector needs to pulse every time one of the other 4 main injectors pulse. Any guidance is appreciated. Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 26, 2020 Report Share Posted June 26, 2020 Do you have a G3 Link plus or the small G3 LEM? The LEM only has 2 injector drives so you wont be able to do aux injection. The G3 Linkplus has 8 drives so that should be able to do it. Quote Link to comment Share on other sites More sharing options...
JFB Posted June 26, 2020 Author Report Share Posted June 26, 2020 What a great question... How can I tell? Looks like I may have a LEM G3. Is there no workaround to pulse an injector in the manifold? Like a 12V relay maybe? Quote Link to comment Share on other sites More sharing options...
Adamw Posted June 27, 2020 Report Share Posted June 27, 2020 9 hours ago, JFB said: Looks like I may have a LEM G3. Is there no workaround to pulse an injector in the manifold? Like a 12V relay maybe? Normal aux outputs are not synchronised to engine operation - it would just be squirting at a fixed frequency all the time. You can vary duty cycle with boost or whatever, but it wont be timed with the other injectors. Quote Link to comment Share on other sites More sharing options...
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