Fine Tuning a 360 Magnum with a Brawler "Double Pumper"
I can’t see well enough in the pictures but if the T slots are square on both sides secondaries are open too far.
Or there’s an air leak because square T slots isn’t much opening.
Figure that out first.
Second, you will NOT go to hell and burn forever if your T slots aren’t square. I don’t know when it became the do all, be all, end all but it’s not.
Start with them square and tune it from there. If you get them open too far you’ll figure that out.
Second, stop listening to the internet about some spectacularly high initial timing. That’s bullshit.
I forget if you posted your idle vacuum but if you have 20 at a cruise you probably have enough at idle that you don’t need some mega high initial.
You need that when your engine builder misses on compression ratio and cam timing and you have to crutch his mistake.
Or, there are times where you need more cam and you can’t tolerate more compression . Then you can get into more initial timing.
IMO if you have to add manifold vacuum to the vacuum advance to make the engine idle you’ve missed somewhere.
Third, look and see if all three of the emulsion holes are drilled out and measure them. Regardless of size (for now) block that middle emulsion hole.
Then lower the idle feed restricters. They stick out like a turd in a punch bowl and they need to go down.
If you search the web for NACA paper number 49 you should download and read it. The stuff in that paper is still correct today and IIRC is nearly or already is 100 years old.
Once you lower the IFR’s you can install T slot restricters.