S2000 Under The Hood S2000 Technical and Mechanical discussions.

red lining while in nurtral

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Old Sep 20, 2008 | 02:12 PM
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Default red lining while in nurtral

Just out of curiosity if you over-rev while in natural does it harm the engine?
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Old Sep 20, 2008 | 02:34 PM
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No.

You need to be in gear to do an over-rev that really hurts things.
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Old Sep 20, 2008 | 02:49 PM
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From the motorcycle crowd, nobody does that without a load. Have a seen a neutral over rev failure, nope. And it is impossible to ovverrev the motor except through bad downshifting courtesy of the rev limiter.
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Old Sep 20, 2008 | 03:16 PM
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interesting. just a thought.
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Old Sep 20, 2008 | 04:30 PM
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It's not good to do, but not nearly as bad like a overrev. If you're going to hit red-line, have a load on the motor
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Old Sep 20, 2008 | 06:19 PM
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Its like telling a baseball pitcher to throw a blank.. or a marshmallow!

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Old Sep 21, 2008 | 07:25 PM
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When you hit the rev limiter, the engine still has inertia. at 9k, your bottom end is moving at 150 times per second (IIRC, I calculated 84ft/sec with the F20C stroke). The fuel cut and friction don't make the engine stop instantly at 9k. It wouldn't surprise me if you banged on 10k if you just layed on the gas pedal with no load.

I have a civic with an engine that I wouldn't mind blowing up and I've been abusing it. The tach reveals about 7700RPM when I bang it off the rev limiter with no load (fuel cut is 7k). I plan to do this with the exhaust manifold completely off the car on Thursday. It's going to be a bloodbath.

OP: Why do you want to do this anyway? To look rad?
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Old Sep 21, 2008 | 07:27 PM
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No load redline isn't real nice to the connecting rods... I wouldn't do it.
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Old Sep 21, 2008 | 07:51 PM
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Originally Posted by B serious,Sep 21 2008, 07:25 PM
When you hit the rev limiter, the engine still has inertia. at 9k, your bottom end is moving at 150 times per second (IIRC, I calculated 84ft/sec with the F20C stroke). The fuel cut and friction don't make the engine stop instantly at 9k. It wouldn't surprise me if you banged on 10k if you just layed on the gas pedal with no load.

I have a civic with an engine that I wouldn't mind blowing up and I've been abusing it. The tach reveals about 7700RPM when I bang it off the rev limiter with no load (fuel cut is 7k). I plan to do this with the exhaust manifold completely off the car on Thursday. It's going to be a bloodbath.

OP: Why do you want to do this anyway? To look rad?
wow. just let me have that civic if your gonna blow it up.
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Old Sep 21, 2008 | 07:54 PM
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^ It'll be for sale after I put a new engine in it. I bought it to flip it and sell it for profit. It needs a new motor. The old one has a blown head gasket and some other issues. I'm sure I could fix the head gasket, but the new engine was free. Since free is less than the cost of a new head gasket, that's the route I'm going.

The old engine will be for sale if it doesn't blow up. Obviously, I'll inform potential buyers about it's condition.

Also, maybe you should be making that propostion to the OP. Presumably, he's doing that to a S2000. I'm doing it to a civic with an allready damaged and mostly worthless engine.
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