I bet the total is around 34deg btdc and you only have a curve of 8-10 degrees in the dist. It sounds like your engine is designed and built to be at the track more than it is on the street!
yes sort of
They most proberly drop an off the shelf dizzie in .. HEI ,, modern.. these are setup for modern EGR engines off the shelf... lean burn...which mean little cent and a hell of a lot of Vaccuum...
Or put another way.. they are either to damn lazy or or dont have any understanding of timing, how it relates to start motors and other components of an engine.
Stiener also explained here
. If it's an HEI in the engine, it probably has 20 degrees or more in the vac can which is why they would say not to use it with their timing setup. That's easier for them to do than to set it up properly. Plus typical crate engine dyno tuning is just w.o.t. tuning, not done for driveability.
A Street driven engine IF set up correctly will ALWAYS have VA and if a Non egr will always have VA.. If not the engine has not been fully dialed in, most property because of a lack of understanding how time components and carb components work
basically both the carb and the dizzie have 3 separate independent functions that are dialed in separately
idle circuits, power circuits and cruise circuits.....
And what is a shame is ppl spend so much time in body detail , engine building then at the end only bother with doing the power circuit and the rest are basically 1/2 hearted patch ups.
Its like throwing panels on a car then not even bother getting them even close to straight.