Not Ranked
You have been thru a lot---I have worked on several Demon carbs and they are basicly a upgraded airflow Holley but with very poor manufacturing processes causeing problems---
If the Demon issues have been resolved--maybe you have some bent intake valves or bad gaskets---you haven't said anything about trouble shooting the symtons
I use 5 jet sizes as a base line for power valve flow---why don't you just plug the power valve to take it out of the circuit????
Check some of my posts on the Demon carbs for some of the other guys recently
Just put a Holley 780 on the car and see how its supposed to run, then tune your Demon to similar specs---
Do you by any chance have all the plug wires on the right plugs????this was common after the FE engines came out--first tuneup and then the car ran like sh---
Jerry
|