EFI, Crower intake, idle problem

[Hocky]

Hocky,
I think you're right about the idle timing. Doug Flynn at Holley has mentioned that many BBC with a healthy cam like to have around 20 - 25 degrees of timing at idle. It's also mentioned in the Holley tuning manual. Might try advancing the timing and playing with the A?F ratio at the same time. More advance might clean up the exhaust odour.

As Jody mentioned, give it what it likes.
John

I have now recalibrated the throttle plates and got an idle of 900-1000rpm with the throttle a little open. Changed the timeing to 20 degrees and this was making alot of difference. I now can have a idle AFR of ~14 without the irritating sneesing up thru the intake ;)

Getting there...

[kmcanally]

The initial timing on such an engine should be a minimum of 25. I would run as much initial lead as you can until it strains the starter.