Spirited driving fail? Over rev?

[Tcoat]

Originally Posted by Detroiter

I could have sworn I read it was a fuel cut limiter and that it was potentially dangerous because of that(causing lean issues and such) but I'll admit I could be wrong.

But it is definitely not a magical device that will stop that from happening. All I was trying to say was that I have seen tires give way from a over rev mis shift before. I agree that in with the engine trying to go well above the rev limit it would most likely blow the engine.

You are 100% correct on the rev limiter cutting fuel and preventing over rev in a acceleration situation. It just won't let you go that far. In a down shift your engine is fighting all that rotating mass and the energy is going to go someplace. Some will go to the wheels as they lock up and slide but even more will go to the engine since it becomes the weakest link at that point.

[stevesnj]

Originally Posted by Tcoat

You are 100% correct on the rev limiter cutting fuel and preventing over rev in a acceleration situation. It just won't let you go that far. In a down shift your engine is fighting all that rotating mass and the energy is going to go someplace. Some will go to the wheels as they lock up and slide but even more will go to the engine since it becomes the weakest link at that point.

All the torque must hit the engine in that situation.

[Tcoat]

Originally Posted by stevesnj

All the torque must hit the engine in that situation.

Not all just enough. It isn't just the high revs that are the issue it is the suddenness of the impact. An engine is designed to build RPMs more or less linearly. When they surge with a serious over rev they go well beyond the design specs.

I am not sure how this is even a debated subject. It is basic physics and engineering.

[Ultramaroon]

Originally Posted by Tcoat

I am not sure how this is even a debated subject.

Painful read. Literally wincing over here.

[Tcoat]

Originally Posted by Ultramaroon

Painful read. Literally wincing over here.

No kidding. Half these guys are going to blow the welds on their manifolds if they think they are protected from over rev.

[Ultramaroon]

Originally Posted by Tcoat

No kidding. Half these guys are going to blow the welds on their manifolds if they think they are protected from over rev.

Over rev limiter will save us all.

[Tcoat]

Originally Posted by Ultramaroon

Over rev limiter will save us all.

Or they can just overnight parts from Japan.

[Ultramaroon]

Originally Posted by Tcoat

Or they can just overnight parts from Japan.

Nobody likes the tuna here.

[Tcoat]

Originally Posted by Ultramaroon

Nobody likes the tuna here.

They can't over rev if they don't granny shift and double clutch like they are supposed too.

[Ultramaroon]

Originally Posted by Tcoat

They can't over rev if they don't granny shift and double clutch like they are supposed too.

must!

resist!

[Tcoat]

Originally Posted by Ultramaroon

must!

resist

[Ultramaroon]

Originally Posted by Tcoat

.

[Tcoat]

Originally Posted by Ultramaroon

[nikitopo]

So this guy was nuts and un-professional and he was just risking the health of the motor for a single lap time:




By the way, since young guys are reading here ... I am not saying that anyone should do this!! This was done by a very skilled racing driver , with years of experience and it was done in a closed track. In fact this guy is now the leading principal of Toyota's Racing team.