Over-Revved, Am I gonna be ok ?????

Chuck33079 · 04-17-2014, 12:15 PM

Quote:

Originally Posted by Mitco39

If you were going to do damage you would have known right then and there when you dropped a valve.

Yep. If you overrevved it enough to cause piston to valve contact, you wouldn't need to ask anyone. You would know with 100% certainty because the car made a very expensive noise and you felt a sympathy pain in your wallet.

Girald · 06-21-2018, 06:09 PM

Ive money shifted twice (*ouch and ouch) Once on the freeway to damn near 9k in gear and another just over 8 at the track, with clutch out...

Not proud of it since it always feels like how you feel when you see someone get kicked in the balls..

That said, ive had compression and blow by checks to gauge health just before a TT install coming up. All looks good, car sounds strong, and mag oil plug looks typical. I have to say, these cars take abuse, but im not trying to repeat it....

BUT: I do know now that the non-nismo oil pumps are sht, and my future at the track could kill the car if i dont upgrade to a new billet oil pump gear, or simply switch to a nismo oil pump. And - i might have done damage to the pump that might reveal itself after boosting and tracking the car...

I did add an oil pressure gauge, something my OCD enjoys to stress about. So, I can catch a failure in time hopefully,,, but 99.999% I will swap to the new billet pump when they drop my motor for the turbo install.

ALL OF THAT SAID: if the car can hang with me for 2 years boosted, ill be sending it off to AAM for a forged block and 750WHP no shts given

Spooler · 06-21-2018, 06:57 PM

You want a Sucker Punch oil pump. I would suggest you research on here for folks who build a quality motor. I would not use AAM.

Rusty · 06-24-2018, 10:09 PM

Quote:

Originally Posted by Spooler

You want a Sucker Punch oil pump. I would suggest you research on here for folks who build a quality motor. I would not use AAM.

Calling BS on the rev's tho. Unless you changed the factory rev limiter from 7,800 to some higher.

BGTV8 · 06-25-2018, 04:03 AM

Quote:

Originally Posted by Dreezy562

This is why synchro revmatch is stupid. I knew that would blow an engine sooner or later

Syncro-rev WILL NOT over rev the engine, it will only rev to redline

ayrton88 · 06-25-2018, 10:41 AM

Is it just me, or does it seem like some people really don't understand how an over rev happens and that a rev limiter has nothing to do with it good or bad.

Rusty · 06-25-2018, 05:51 PM

Quote:

Originally Posted by BGTV8

Syncro-rev WILL NOT over rev the engine, it will only rev to redline

Quote:

Originally Posted by ayrton88

Is it just me, or does it seem like some people really don't understand how an over rev happens and that a rev limiter has nothing to do with it good or bad.

BGTV8 is correct. The Syncro-rev will only supply fuel until the limiter is hit. Then shuts the fuel off. The over rev happens when the road speed is greater then the engine rpms for the gear the tranny is in when down shifting.

When up shifting. The factory rev limiter is set at 7,800 rpm. When you hit that up shifting. The fuel shuts off. The motor will coast up a few rpms past 7,800.

I've been in to my rev limiter more times then I care to count.

One car I had. I lost the motor by going down 2 gears instead of one. Big block chevy motors don't like to spin past 9,000 rpms. Spun all the rod and crank bearings. Egg shaped a few small ends on the rods too.

06-21-2018, 06:09 PM	#62 (permalink)
Girald Base Member Join Date: Jun 2017 Location: Denver Posts: 135 Drives: 15' 370z SpTech 6MT Rep Power: 3363	Ive money shifted twice (*ouch and ouch) Once on the freeway to damn near 9k in gear and another just over 8 at the track, with clutch out... Not proud of it since it always feels like how you feel when you see someone get kicked in the balls.. That said, ive had compression and blow by checks to gauge health just before a TT install coming up. All looks good, car sounds strong, and mag oil plug looks typical. I have to say, these cars take abuse, but im not trying to repeat it.... BUT: I do know now that the non-nismo oil pumps are sht, and my future at the track could kill the car if i dont upgrade to a new billet oil pump gear, or simply switch to a nismo oil pump. And - i might have done damage to the pump that might reveal itself after boosting and tracking the car... I did add an oil pressure gauge, something my OCD enjoys to stress about. So, I can catch a failure in time hopefully,,, but 99.999% I will swap to the new billet pump when they drop my motor for the turbo install. ALL OF THAT SAID: if the car can hang with me for 2 years boosted, ill be sending it off to AAM for a forged block and 750WHP no shts given __________________ AAM tt'ed // Soon: Moving back to the East Coast

06-21-2018, 06:57 PM	#63 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,826 Drives: 2013 Nismo 370z Rep Power: 2684392	You want a Sucker Punch oil pump. I would suggest you research on here for folks who build a quality motor. I would not use AAM. JARblue, Rusty and Ghostvette like this.

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06-25-2018, 10:41 AM	#66 (permalink)
ayrton88 Enthusiast Member Join Date: Apr 2012 Location: Chicago Posts: 397 Drives: 2010 Nissan 370Z Rep Power: 14	Is it just me, or does it seem like some people really don't understand how an over rev happens and that a rev limiter has nothing to do with it good or bad.