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

kenchan

wakes you up, doesn't it? ive done it too a few times. the gates are slightly different from my G which i drive daily so it's a tad tricky for me when i get in my Z on the weekends.

mantella87

That's why a 3rd to 2nd misshift is called the "money shift". I think your engine is fine. Just be more deliberate when shifting from now on.

Jeffblue

If you can't blip the throttle or put the shifter in the right gear... just buy an automatic. How many aspects of shifting can the car perform for you while still being a manual transmission. I think we need a feature in which the shifter actually moves between gears for us and then we can just kind of hold on and pretend we are doing it kind of like those pianos that play themselves.

FuTuRe is Z

I'm pretty sure down shifting from the top of third to second it would bring you to over 10K rpm.

JARblue

__________________

Mt Tam I am

I listened (at a banquette dinner) to a professional race driver Johannes van Overbeek, complain about his team mate over revving his Porsche to 11K to assist breaking. The crew chief said so. If it breaks we (Porsche) will make it stronger.

Porsche's can handle it easy.

__________________
Nissan Motorsports 34R Oil Cooler. Stillen CBE. Hotchkis Sport Sway Bars. KW Variant 3 Coilover System. Stillen Gen3 CAI. Michelin Pilot Super Sport. Stillen Brake Ducts. Carbotech™ XP10/XP8 Pads. Z1 Front Rotors. Z1 Stainless Brake Lines. Two degrees of camber

FuTuRe is Z

Would you have preferred me posting a new thread? Truth be told; I'll take a necrobump versus a new thread every day. That way it mitigates the duration of time it takes for someone to find what they're looking for via the search function when there is only one or two threads covering the topic.

JARblue

No disrespect intended I was just particularly amused at the length between posts and took the opportunity to post a meme (one which I thought was pretty benign and not belittling). It seemed like you were responding to a 2.5 year old post.

You are absolutely right, especially with topics such as this. Thank you very much for using the search function and having the perspective that you do. That helps make this forum the best one on the interwebs

__________________

FuTuRe is Z

Can I go on the record and admit the meme creeps me out. lol

kenchan

you guys better call DE..

ElVee

Is that a clown, a zombie, or both?

JARblue

From what I can tell, both

__________________

Mitco39

Threads like this are comical. We have guys who probably have never lifted their hoods commenting in here. Some of the posts really show that.

There is one big difference that Mt Tam I Am sort of mentioned. There is a huge difference between over revving under load and over revving under no load. The loadings on the engine are completely different. I would not be worried about over revving for a quick duration, if the engine didn't drop a valve or break the oil pump your fine.

Longer than a just a quick blip of the rpms and I would be worried about the engine moving towards dangerous harmonics than anything else. Its those harmonics that would absolutely kill an engine (again the harmonics under load are going to be different than a quick overrev). I would consider the biggest limitation (aside from harmonics) to setting a redline for a particular engine is in the heads, more specifically the valves.

Think of it this way, unless an engine is blueprinted and truely balanced (and we all know that nothing is perfect) its like taking your very very slightly out of balance tire and accelerating with it. You can easily feel when the tire starts to vibrate the whole car, then as you go faster you may notice it go away, but there becomes a point when its going to get much worse as you start to move towards its natural frequency. The same thing will happen (and does happen) in your engine.


Anyways, sorry for the bit of a rant. I promise you your engine will be perfectly fine. If you were going to do damage you would have known right then and there when you dropped a valve.

__________________
2007 Chevy Duramax - EFILive Tuned By Me
2010 40th W/ Nav - Boosted Performance - UpRev Tuned By Me
The Mrs. Ride -2012 335XI N55 BMW - Cobb Tuned By Me, Built by her
My Build --> http://www.the370z.com/members-370z-...39s-build.html

Chuck33079

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.

__________________
2011 MB Touring-Sport-6sp-Nav/GTM TT/FI TT TDX/JTran/Kosmic/Eibach/Hotchkis/SPC/CSF/RPS/SoThatsWhereAllMyMoneyWent

Girald

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