Such a simple question that demands an acute explanation. I feel like this is one of those worm hole questions that I need to navigate with precision.
I would venture out there to say that most everyone knows the challenge an Ultra 4 race car faces is climbing hills, rocks and attempting to track through the desert at really high speeds.
Let's assume that when the car is going up hill, that a large total weight percentage of the car is putting pressure on the rear end. This begs the question of why? Why would I want to put the engine in the rear of the vehicle, loading more responsibility onto the rear end? I have a perfectly good race duty front suspension. I'm not going to treat the IFS system on the front of this car like it's fragile. No. I'm gonna charge it with community service.
For me, this boils down to 2 things.
1 - Having enough weight on the front end to push the tires back down to the ground as quick as possible while I'm hauling the mail over bumps. I have to be able to steer this thing. If the front end of my car is bouncing around and flying in the air, I have no traction to steer.
2 - Get the front tire patch over the apex of a ledge and I've won most of the battle. Given, your gonna run into spots where the talent tank needs to be involved, but if I'm traveling over 3 miles per hour I've lost all visual and mental acuity with the rear end. It's not taking up any percentage of brain space at this point. I'm full bore on getting those front tires in position to climb over a correct line. Apex, apex, apex, I'm just zoned in on the rocks in front of me getting the weight of my front tires on an apex, because if I've done that, I've already beat the bully.
Most of us know what the little Rock Hill looks like at the flats? As soon as I had 4 tires on that rock garden, I would be setting my front tires up on a line half way up that thing that would allow me to just rip on the throttle, and come off the top in a fury with all 4 tires diggin for a trophy.
I would go out of my way to have a larger percentage of weight on the front half of the car.