Stalling on overrun/stopping

[Sparkystav]

ive got a turbocharged Toyota straight 6, with a large inlet manifold and 90mm throttle. I'm also running a Bosch idle control valve. 

 

However were here struggling to get the engine to idle when coming to a Stop. Basically when the throttle shuts there isn't enough air and we need to be able to advance the spark and get some more air into the engine so it doesn't Stall. As the signal to the icv isn't reacting quick enough to prevent it  

 

What at settings should I be using To manage this?

 

thanks

marc 

[CamB]

Have you tried using the idle ignition control, discussed here?

http://www.linkecu.com/forums/G4Forum/190229329