Cam is only 230@050 and 112lsa. 050. 9.8 compression rpm intake. Motor made 490hp/553tq.
I did open up the idle air bleeds to 76 from 73. It’s more responsive to adjusting the idle screws.
I got it to 12.2 by closing them up to 3/4 or 1 turn out I can’t remeber exactly. But now it stumbles and dies when I try to take off.
Next idle try to open up the butterflies some to see if it helps, but doesn’t that uncover too much of the slot?
Timing is 18initial 36 total.
18 Initial is not enough. You can lean the idle circuit and turn the mixture screws all the way in, but unless you start to burn that mixture at the proper time you will get incomplete combustion of the fuel. Your idle vacuum is low, with low idle vacuum the fuel takes longer to burn because it doesn't vaporize as much of the fuel. For testing purposes lock out your timing to 36 degrees, see how it responds...
