So I know launching an S is horrible for the diff, and I know how fragile they are. I've never launched my car, but the other day me and my brother in law were driving and I offered to let him drive it to see how it felt compared to his rsx-s. I pulled over and we swapped seats. Now he knows not to launch my car because I've told him about our weak rear end. But when we were rolling in 1st at about 15mph he revved it and dumped the clutch and made the tires spin, I then went off on him for doing it when I've told him not too and he tries to explain to me that that's not like launching because we're already moving and the differential is moving so there is no play in between the gears so there won't be any stress on it. Part of me kind of makes sense of it but the other part of me still thinks that's bad for the diff. Now my question is, is that bad for the diff? Could that break it just like a launch or is his theory of less stress on it because of the movement and no play in between the gears true?

 

From what little I know about differentials, his logic only works if you don't do a clutch dump. Any time you disengage the drivetrain from the motor, it's not under stress, and depending on mass and time, probably spinning a lot slower. Short answer, no, it's not good. But hey, at least he broke the tires loose. Far worse when people are pussies and the drivetrain just has to absorb the shock.

 

Anyone have more input on this? I think it'd be fun to throw the S a bit side ways once in a while with out busting that diff. And I've never really learned how to slip a clutch or what it even is so the only method I know I'd the clutch dump althought I've never done it on the S

 

s2000 has plenty power to get sideways little quick weight transfer and your sorted,there is not much point in dumping clutch while rolling just putting stress on the pinion and then if done enough start rounding the lugs(teeth)and possibly snapping, but s2000 love getting driving hard and thats when it performance best max hp @ 8k and max torque @7300rpm. But yes everytime you dump clutch at high revs lessens the life of you diff. best time to cause less stress is to wait till is raining and go to local drift track. i have one up the road plenty space and get to know why your s2000 is so great and so balanced, such a great car, learn Heal and toe better for running gear

 

it's bad for your car. his logic doesn't make any sense. whether there's play or no play in the gears, you still need the same amount of torque to spin the tires in order to break traction, granted, static friction (grip) vs kinetic friction (tire spin). whether or not your car is moving or stationary doesn't the same amount of torque is required to break traction. therefore, you should do some 8k clutch dumps on his rsx-s in return. =D lol.

 

It is nearly the same thing as launching when stopped. His logic is completely wrong. sure it might be a few lbs less but still quite a load going through the drive drain.

 

That would be the last time I let him drive my car.

 

mehhh dont worry ap2 diff's are about 20% or so stronger. one clutch dump wont hurt anything. the problem comes when you do it constantly.

 

Not quite.

The case rigidity was improved by 40% while the overall case strength was increased by 20% and gear fatigue resistance was improved by only 5%. So unless you plan on going off-roading the 40% increase in case rigidity won't help you out.

 

I remember reading somewhere on the forums stating that as long as you're breaking traction, there is less stress on the diff than flooring from a gear and bogging which puts stress on the rear end. Wisconsin launched his car over 1000 times I believe and no diff problems!