TKE

How bad is one time of over revving? I missed a gear earlier and pegged the tach past 9k on my 1990 gxl. Does one time of over revving like this usually **** stuff up? Car seems to drive normal after this. I'm just paranoid after this I guess. How would a blown apex feel like?

J-Rat

iTrader: (2)

Its a pretty good bet that you didnt really damage anything..

Little rotary 101.

the rotors are spinning at 1/3 the RPM you see. The reason for the redline is that A: your making NO more power at higher revs, and B: The stock ignition system tends to start breaking up at that high of a trigger rate.

BlaCkPlaGUE

neat, I had no idea it was 1/3 of the rpm you see! what should rpm really be described as when viewed from the dash? should we call it 8000 spark signals per minute or something?

TooMuch4You

xxxx revolutions of the eccentric shaft per minute

300zx

The E-shaft is only moving at the rpm's you are seeing. The rotors arent. Its on a 3/1 ratio like said above. Which mean that the e-shaft spins 3 times for the rotor to make it once around. You didnt do any damage.

If you were to have blown a apex seal you would tell right away the car wouldnt sound right, wouldnt rev smooth, no power, ect. You would know.

SureShot

The ECU has a rev limiter that will cut fuel before any harm is likely.

The issue with over revving is side clearance as the rotors start to wobble at >9K.

DerangedHermit

I would assume this is why you see balanced e-shafts and such on sale to prevent such acts of engine violation.

BGH

Also you can have a rotor bearing walk
on a high rpm. Talking from experience.

totallimmortal

not to mention the stock drivetrain isn't made to spin that fast and the clutch or flywheel could grenade

Snrub

iTrader: (1)

It's not good to over-rev your engine, but it will certainly take such abuse if done infrequently. I think most people have done exactly what you've done with no ill effects. As was mentioned, rotaries are more tolerant to high revs.

You may read some posts of people over-reving their engines (in gear) on purpose on a frequent basis. Despite foke-lore, it's not good to over rev your engine. I have blown an engine in part due to overreving, but that was on a track and for a prolonged period of time, etc.

DerangedHermit

What rpm would you say is close to making the clutch grenade? 13k?

CokeRx7

damn.. 13K.. that's some rpm.. the most ive takin it was 5800 rpm.. when that annoying beep came on.. i got scared and shift to the nxt gear.. i ws in 3rd.. :-P goin about 80..

TKE

"Also you can have a rotor bearing walk
on a high rpm. Talking from experience."

Would this be apparent right away?

J-Rat

iTrader: (2)

Dude.. Your car is FINE.. Your fuel would have cut at around 8800...