Fine Tuning a 360 Magnum with a Brawler "Double Pumper"

Newbomb Turk said

What size pump shooter do you have?

Also, one more time for me because I’m old, clue me in again where the stumble is and how much throttle are you into when it happens.

Just an FYI. Having an extra emulsion hole open, or more than you need is a better way to say it or using too big of emulsion holes will cause what is called “slugging”.

You can see it on an A/F ratio graph. You will see a saw tooth pattern where it goes rich and lean because it’s getting a big slug of air. Then a big slug of fuel.

At any rate, slugging is real. Emulsion is to correct the fuel curve, not to emulsify fuel.

Click to expand...

Right now I have a 35 shooter, went up from a 31 that came stock. Still have the stock white cam.

The stumble happens when I'm off the throttle and quickly get into it. For the most part, if I'm already down on the throttle a tiny bit and I quickly press it, it revs up with a very slight hesitation. If I'm fully off the throttle and I smash the gas it cuts out and then goes.

Doing Dominos, I can get a lot of different scenarios knocked out in a short span of time which I guess is useful to a point lol. If I ease into the throttle it doesn't hiccup at all, it's just anytime I remotely quickly get into the gas.

I think it's difficult to get that pump shot figured out because it's a relatively light truck with a really short first gear, and a bunch of torque so it gets moving quickly. If I was to try to fully open the primaries and try to get moving fast, I guess the best way to describe what the engine sounds like is puh-WAHHHH *shift* puh-WAHHHHH. (The "puh" being a cutout lol, it throws you forward into the wheel and the nose drops, then the other circuits catch up and then it throws you backward into the seat)