COBB Accessport - Goosetuned Tuning thread

[Supreme Ruler]

So, after watching, HSF, when do axels start breaking after HP increases? I love to go fast, and racing from the dig, but braking parts isn't something I want, but know that it happens. So, @ what HP does stock axels give up? Trans drums lose control? Motor internals need to be worried about?
This being a young plate form, I'm interested, Old Pontiac guy, made them go fast, but this SUV feels like it could do a lot, but it has some soft parts from the factory.

What say you?

 

[bluesnake01]

So, after watching, HSF, when do axels start breaking after HP increases? I love to go fast, and racing from the dig, but braking parts isn't something I want, but know that it happens. So, @ what HP does stock axels give up? Trans drums lose control? Motor internals need to be worried about?
This being a young plate form, I'm interested, Old Pontiac guy, made them go fast, but this SUV feels like it could do a lot, but it has some soft parts from the factory.

What say you?

Main thing you need to be worrying about is beefing up the rear end if you have a late 2021 - 2024 Explorer ST, single bolt's tend to break. Top off your transmission fluid if its below the line, always add 6.5 qts of oil during oil changes for those hard launches. Add steeda toe links and bushing subframe supports, IMO you should be golden under 600whp with everything else stock.

People have run 550-600~whp with the stock tranny no issues and every major component stock, internals have yet to be determined its max potential but there are 650+ whp ST's on stock internals,

 

[BBGun242]

So, after watching, HSF, when do axels start breaking after HP increases? I love to go fast, and racing from the dig, but braking parts isn't something I want, but know that it happens. So, @ what HP does stock axels give up? Trans drums lose control? Motor internals need to be worried about?
This being a young plate form, I'm interested, Old Pontiac guy, made them go fast, but this SUV feels like it could do a lot, but it has some soft parts from the factory.

What say you?

Lots of factors go into breaking axles.

#1 shock load. HSF uses his transbrake for launching.
#2 wheel hop/bunny hop. If you launch on a surface with too much grip or too little you will break stuff from a launch. If it feels like the cars shaking let out.
#3 suspension angle. Axle joints are strongest when they are level from diff to wheel bearing. Too high or too low turns the twisting torque from rotational to angular force.

The transmission internals start slipping after the 550ftlb range from what I've seen, though your tuner has more experience.

Major HP limiting congress from the factory fuel system. These turbo engines really like ethanol so you can keep the timing on them. Direct injection though is limiting somewhat there, there's only so many crank degrees allowed to fire the injector. This is why you will see lots of dynos on these ST with massive TQ numbers from 2,500 RPM and trail off like diesels. Guys have been piggy baking a 3rd party port injection kit though.

Internals are really stout as long as timing and knock are in control. Plenty of people 600+ at the tires, but after that it sounds like cap walking becomes a concern and limits longevity.

 

[Supreme Ruler]

Trans brake, that's what I missed. That make complete sense, since he is using the T-brake. Thanks all.