While developing and testing my fuel controller, I estimate many, many minutes worth of bouncing on my rev limitter. I recently inspected my valve clearances, and they were still spot on.

 

That's a new one to me.

The rev limiter I was refering to is the ignition/fuel (whichever one it really is?) cut off if you try to over rev the engine, usually on full throttle accelerations. The first time I hit it, I was accelerating in 1st gear and ran past redline before I realized what was happening. As I've said in other posts, this car gains rpm's "way" faster than any car I've ever owned and it took me a while to get used to that. Anyway, the rev limiter kept me from lunching my engine and the effect, especially in 1st gear, was pretty dramatic at the time. It's not as big a deal for me now and it's also not something I do very often anymore because I'm much more comfortable with the car.

FWIW!

Drive Safe,
Steve R.

 

I wouldn't think that bouncing off the rev limiter would be that big a deal for the valves themselves. What they go through, just in the day to day operations of the engine, boggles the mind.

What the pistons, con rods, crankshaft, and the rest of the drive train absorb when the rev limiter kicks in at full throttle (max power to no power and back again, several times / second) would seem to me to be more traumatic.

JMO!

Drive Safe,
Steve R.

 

If you do some reading here, you'll see that overrevs tend to damage the valve train quicker than the bottom end. The pistons, con rods, and bearings experience a full stop and start to full speed every rotation whether there is fuel / ignition or not.

 

[QUOTE=gernby,Jul 28 2005, 04:33 PM] If you do some reading here, you'll see that overrevs tend to damage the valve train quicker than the bottom end.

 

My point is that the pistons, con rods, crank, and rod bearings are far less prone to failure due to high RPMs than the valve train.

 

also when hit the limiter you running extremely lean.

 

I'm quite certain this is NOT true (as seen on my WBO2 logs). There is no reason why Honda would create a dangerously lean running condition intentionally at high RPMs.

My guess is that the ECU cuts both fuel and spark every X cycles. The number of cycles (X) may depend on how far into the rev limitter you go. The cold rev limitter at ~7K RPMs may be a complete fuel and spark cut resulting in a more abrupt reaction until the RPMs fall below ~6900 RPMs.

 

i thought it only cuts fuel... hmm..

 

i think this applies to all cars but when you hit the rev limiter, it just cuts the fuel? no?