Footbrake vs. Transbrake

I’m 100% sure it’s not the carb. I run a toilet

Then you were throwing a lot of fuel for a footbrake car. With the transbrake you were getting away with it. I’ve seen a lot of combos that run pretty close both ways. My duster goes red on the third yellow when I footbrake so I put a long throw button in my car but never tried it yet.