Thanks for the info Rusty.  I have the stock primary injectors (52lb turbo) in the engine block and secondary MSD injectors in the throttle body 22in. away.  The problem is unchanged if I run on either set of injectors alone.  It is doing some strange things.  I have a few more ideas I want to test then I'll post a complete problem summary.

 

Dave Leonard 

 

I don't know what to tell you Dave.  That's how my rev-1 setup was, and it idled great at 1500, and pretty well down to 800-1000.  I kept it at 1500 though.  Ed said that he tried the turbo injectors once, and removed them because he didn't like the idle.  Not sure I understand why, but maybe he'll recall some more info about the situation.  

 

Any chance you have an air leak that affects one rotor more than the other?  This would cause more of a problem with vacuum at idle.  Do you have dual EGT's so you can see if there's a temp diff when struggling to idle?   Just guessing. 

 

Good luck,

Rusty (pushing 200 mph next weekend, I hope)

 

Last cause of this symptom I ran into  was when an EC1 user switched to EC2 (I highly encourage that with a trade-in discount) and didn't add the external 5 ohm resistors needed with Peak & Hold injectors (They were internal on the EC1).   Big primary injectors do make idle tuning more difficult.

 

Tracy