Jump to content

5th injector setup

Recommended Posts


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.

Link to post
Share on other sites
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.

Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

  • Create New...