Thermoquad idling issues

Bewy said

The idle rpm increased because the engine is making more HP. Exactly what was expected.
So, when you switch off the engine, fuel leaks out of the pri shaft?
That could be leaking needle & seat { unlikely } or the o rings are not sealing. After switching off the engine, shine a light down the pri bore to see if you can see where the fuel is coming from.

Did you disconnect & plug the PCV? This cam is going to need more air & fuel to idle. So the fact that the pri blades are almost closed means the engine is getting air from somewhere. Make sure the sec blades are fully seated. That leaves the PCV [ not closing off at idle & letting a large amount of air into the engine ]; or air leak

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So, this engine wants 32 at idle. Fair enough. Even using manifold vacuum (he can’t use ported or it won’t matter and we both know that) he will still have a hard time getting the rest of the curve in shape.

This is an example of needing a programmable ignition. He’s going to have a hard time not having too much timing at peak torque. I guess that depends on what the curve needs to be without the extra timing at idle.

This is one of the hardest things to build a curve for. You can’t get the timing low enough at peak torque even when the vacuum drops.

He may be better off at 26 or so initial, no vacuum and tune the curve up and then see what he can get with the vacuum hooked up.

Now I’ve forgotten what the original engine is…