""The lean spike on idle->WOT is pretty high""
- Yes it is and I am already working on that one with a larger squirter on the secondary. If that does not fix it then I am going to change the secondary linkage from 60% to 40% to see if that helps. I just don't want to change the volume.

""Do your comments about being surprised by the results imply that the car would not have as much tire spin with a lower AFR on the WOT hit?""
I have beeen fighting an over-rich Idle to WOT A/F reading which made the car a dog. I have read where others were having great response at idle to WOT with their DP's but I was having to raise the rpms a little bit to see the same results. Now it is instant tire spin with the delay in fuel from the secondary pump.