Yes it's true... Last night (Saturday) I was racing a new M3 which was mighty fine might I add... I had an awesome launch, was tearing *** down the track, ran a great 8.8 @ 85 1/8th mile and right after that I missed 4th and hit 2ND GEAR I got the pleasure of watching my tach actually point almost completely down... Listen closely, and towards the end of the video you can hear it... So far the car is running ok, its still fast and all, but there is definately a little bit more noise from the valves than before, but it still idles, revs, and runs fine... so I dunno... I'll be doing a compression test and if necessary leak down test soon to make sure everything's ok...

http://www.clanh2k.com/frosty/maxima...s/9000rpms.wmv

*EDIT* More specifically, you can hear it when you see my car passing under the sign that displays the 1/4 mile and trap speed, and then it lights up with my 1/4 and trap after i pass BY it...

*2nd EDIT* Make sure you have your speakers or headphones up pretty loud when you see my car passing under the 1/4 / trap speed sign, or else you can't hear it.

Bryan

 

That sucks man I couldn't really hear it on the video.. Hopefully everything is okay.

 

It's right before I hit my brake lights, you can hear a kinda loud really high downward rev sound... basically you hear me coming down from 9000 rpms...

Bryan

 

I heard like a screeching sound - probably the tires kinda holding back the car since you down shifted instead. Hope everything is ok!

 

i heard it....damn....nice take off though....i think u took off so well because u were next to a m3 hahaha.. that was a hell of a take off

 

ouch looks like your car is coming along nice. Getting faster and faster each trip to the track

 

Yeah too bad I messed up every run that night... I went home one unhappy individual... but all was soon remedied by a cold one...

 

h2kfrosty: I did the exact same thing about 2 years ago. The funny thing is good old Russ told me that it is not possible to do that. I never had any problems because of doing that.

 

was the other guy trying to win the race? it looks like he was standing still!

 

It's not possible to do what? Bend valves?

 

Actually, that's the 2nd time I raced him, the first time, he beat me because I was sleeping bad off the line... I ended up with a .812 R/T Although I did end up with a quicker 1/4 time, he still beat me because he went through the line first... although it was close, I was gaining on him hardcore... haha

Bryan

 

did that m3 run a 15.9 thats freakin slow that driver must have sucked

 

No, just hit 9000

 

OMG


Hope everything's okay!

 

Uhh... I assure you it is... I saw my tach. :P

 

Steve,

So far it looks good... I got on it today and it felt like a million bucks... So, I'll be testing it at the track soon, and we'll see... If I don't trap 108ish then I know somethings amiss...

Bryan

 

If an RSX-S can hit almost 20,000 RPM, I'm sure a Maxima can hit 9000

Tell me some of you guys remember that post several months back...his pistons (in the RSX) looked like chicken nuggets.

Hope everything is well with your engine Frosty...that is a terrible way to kill and engine.

 

I totally remember that man!! God...those were some funny pics. Do you remember how he did that exactly?

Best of luck Frosty....hopefully the VQ can withstand this...

 

I have only two words to say Rev Limiter, there cheap and can save your motor. Trust me I have an msd ingition with soft touch rev control on my 69 camaro and its making 572 rwhp with a 434 cubic inch small block chevy and the rev limiter is set at 8,500 rpm most shifts are at 8,000 rpm.

 

Rev limiter still kicks in by not sending fuel to the engine, but if it's gonna be in 2nd gear at 90 something miles per hour, it's gonna rev up there regardless of the rev limiter. :P

Bryan

 

If you run an aftermarket rev limiter it will cut in based on rpm and not mph. A rev limiter is designed to stop the engine from over reving no matter what the speed of the car is. The rev limiter must work on rpm not speed If you blow a trans or miss a shift its the rev limiters job to save the engine.

 

Ah that works great if you are accelerating. But if you are already going 90mph and if you shift into 2nd gear on accident, the motor WILL rev to 9000rpm(or whatever) because of the gearing/speed. Nothing short of pressing in the clutch will prevent it. Hell even if the engine is OFF, it will still rev the motor to 9000rpm. So a rev limiter does nothing in this case.

 

Yikes, I hope that tranny is ok. 1 2 3 2 Ouch !!!!

 

I've had really good luck with my transmission... It's gone 13k miles with the turbo so far, and I've had nothing but perfection from it so far... So I can't complain, it's a great tranny... Maybe it's the way I shift... I shift smoothly into each gear and rev match... So therefore I don't think I'm that hard on my tranny...

Bryan

 

He redlined 5th, tried shifting to 6th, and somehow forced it into second AND LET OFF THE CLUTCH!! Ugly...

 

WTF....M3 are way faster then 15.9...are u sure it was an M3 or was it an old guy driving that M3

 

Ironic to this story, I know someone that mechanically over-revved a M3. THrew a rod and it came out of the side of the block. Trashed the motor. Either ya got lucky or nissan builds a great engine.

 

Don't new M3 come in two door's only?

 

nope, youre wrong. Very wrong.. hence.. spreading misinformation. if you were free-revving the engine, then yes an msd unit or similar would add a cushion of protection.. (btw its safer to cut spark than to cut fuel)

the hypothetical shift from 120 into 1st, and letting off the clutch... i don't care what over rev protection you have... you better pray your clutch gives way before your engine :shrug:


the rev limiter works on rpm's not speed, you are correct.. but you cant get around the mechanical binding together of the tranny to the engine. electronic over rev protection is only meant to protect you while you are on the way UP. not down. the only known system of mechanical over-rev protection is one ive seen on race cars, where the flex plates (it was a full drag auto tranny) would be physically disengaged from the mating surface, if for whatever reason (like you menhtioned) the tranny grenades. (but like i mentioned, that would be a free-rev situation.)

 

It was an M3, he beat me the run before that because I slept at the light and had a nice .8 R/T, but he still only beat me by a hair. ;P

 

yes, i think so. but this one looks like it has 2 doors....kind of hard to tell though.

how did the M3 beat you before if he only ran around 15.9? or was this run a fluke?

 

The M3 driver must not know how to drive it... That race should have been alot closer.. M3's go 0-60 in 4.8 sec's and 1/4 mile times are low 13's.. Good run though..

 

cool nice beat down. hope everything is OK with the car...

 

nice run, hope your car is ok..........the bimmer seemed to give up after the launch.....
also, noticed your rear end(car) squatting on launch, ever thought about wheelie bars?

 

I thought the tach only goes up to 8000 rpms?

 

Jeff,

Sorry I misunderstud, I thought he missed the shift but after re-reading the post I see that he put the trans into 2nd gear and thus the gearing/speed would make the engine over rev. Does anyone make a vertical gate type shifter for the max?

 

It does, and it went past that.

 

He ran a 2.5 60' so he pretty much took it a little easy after that... He ended up coming through the finish line pretty close behind me though since I went through at 86mph... :P

 

I'm starting to think everything is not ok with the car.. I can clearly hear the valves tapping much louder than they're supposed to outside the car now, although it still runs, idles, and drives fine... It's still pretty fast too, so if there is somewhat of a performance loss, its not huge... But that doesn't mean it can't be... I'll let you all know how the compression test goes. And thanks for the support. Maxima.org =

Bryan

 

I have been in two 02 6spds that have done this and they didn't have good results. Both of the trannies were replaced. The car almost sounded like it have a roots blower from the tranny whinning for help. I doubt you would be able to hear what Im talking about over your turbo noise. Good Luck and I hope nothing is damaged