Highest Rev's on the stock Engine.

[CanadianTSi]

Anyone else ever burried the Tach on there bone stock motor?

At the track tonight I was going for 4th and somehow managed to get 2nd....yikes. Got the clutch back in as fast as I could and the motor was still running, as far as I could tell everything seemed to be ok.

Checked the S-AFC's highest value........ 9471 RPM's Now this is on my bone stock motor with 212,000 kms.

On my next Run I recorded my highest MPH of the night so I think everything is ok (thank god)

 

[14.5 drift]

:laugh: Awesome. Things might have been different if you were trying to put a load on the motor. I did the exact same thing in an s2k, lookin for 4 and found 2


Scared me pretty good.

 

[burldude]

Right on I was wondering what a 4g63 can handle

 

[1993eclipseGS]

Just because his motor did it, does not mean every engine can handle it!!!!!!! I wouldent recommend going out and trying it. I also accidently went from 3rd to sencond and the tires chirpped and it scared me bad, i put the clutch in really fast, nothing happend. i wasent looking at the rpms when that happened.

 

[14.5 drift]

Just because his motor did it, does not mean every engine can handle it!!!!!!! I wouldent recommend going out and trying it. I also accidently went from 3rd to sencond and the tires chirpped and it scared me bad, i put the clutch in really fast, nothing happend. i wasent looking at the rpms when that happened.

Same with me, no time to check the tach. As far as trying this again, I never read CanadianTSi recomending this as a safe thing to do. :disclaimer: Kids, Dont Try This At Home!!!!!...

 

[Kevin Jewer]

I misshifted twice (AFC only goes to 9999). Only damage was the flywheel was cracked all over and loosed up 1 or 2 thousand miles later. Stock head. I would try to avoid over revving as much as possible. Most poeple dont hesitate to run 8000 rpm on a stock motor, some go to 8500. YMMV

 

[zross1]

I think most of us have made the old 3rd to second shift a few times.

 

[gixxer]

your valves love you

 

[Defiant]

your valves love you

Not as much as the pistons they were kissing. It gave them such a feeling, it was like they were floating....

 

[greyforestgst]

ive hit 8000 stock 7 bolt, rev limiter at 7800
no problemos

 

[billdo_83]

I think most of us have made the old 3rd to second shift a few times.

I made that wonderful shift going 95 before.
Bent some valves in that process. The good thing to come out of it was I upgraded to Titianum springs and retianers and better valves

 

[burldude]

I made that wonderful shift going 95 before.
Bent some valves in that process. The good thing to come out of it was I upgraded to Titianum springs and retianers and better valves

I see that you have mentioned titanium springs . I have tried to find these before , would you mind telling us where you found those ?

 

[billdo_83]

I see that you have mentioned titanium springs . I have tried to find these before , would you mind telling us where you found those ?

This is where I got mine from
http://www.roadraceengineering.com/eclengine.htm
RRE

 

[!^3]

That happened to me last week while racing an STi. Hit something while I was doing the 3-4 shift so it knocked me into 2nd at about 90. Bounced the rev limiter but clutched it before it could climb back. This is on a built head with 65lb. crower springs/groden ti retainers/ferrea 1mm o/s valves/HKS 272's so don't try this on a stock motor She's all fine...the STi on the other hand, muhahahahaha

 

[lowridin2g]

u never know with stuff like that. sometimes u get away with it, other times youll be kissing your motor goodbye. as for me i tend to rev it to about 7200 when racing in every gear except first. im on a stock 7 bolt except for hks 272/272 cams

 

[billdo_83]

u never know with stuff like that. sometimes u get away with it, other times youll be kissing your motor goodbye. as for me i tend to rev it to about 7200 when racing in every gear except first. im on a stock 7 bolt except for hks 272/272 cams

7200 is just fine.
its when you start getting up above 8500 on a stock motor you MAY run into trouble.
Every motor is differnet though.

 

[ItsStockOfficer]

I have a 10k revlimiter on my 1g with a bone stock engine and 240k. I have shifted at 9 every time I raced for a long time, runnign 11's, but I buried it racing a bike last week and bent a valve on cylinder 3 at a hair over 10k. 9k is perfectly safe though, I have shifted as high as 9500 succesfully many times....but stick too 9 and you'll be fine.

 

[billdo_83]

I wouldnt risk shifts like that in my car.
9k is just too high to risk floating a valve.
You got balls!

 

[SnowWhite]

Balls are right, huge balls, and crazy balls.

 

[Kevin Jewer]

If he's been going to 9k with no problems for years, how does it take balls? Put down the internet myths, and trust real world experience, especially with your own car.

 

[forcedobsession]

I don't know if all of you guys have aftermarket intake manifolds but somewhere i read that due to our poor intake manifolds on the 4g63's power tends to drop signifactanly at 6200 rpms i may be wrong but let me know.

 

[NewB2dsm]

Meh, here is my peak hold from my afc.

100+k at the time 100% stock engine.

You must be logged in to view this image or video.

 

[DSMeclipse4G63]

I don't know if all of you guys have aftermarket intake manifolds but somewhere i read that due to our poor intake manifolds on the 4g63's power tends to drop signifactanly at 6200 rpms i may be wrong but let me know.

depends on the turbo stocks its cause of the t25, but otherwise the 4g63 is fine. what would limit our high end power would be long intake runners. as for revving when I was on the stock clutch it slipped and the motor revved to well over 9k and the motor usually sees around 8grand at the track and she runs awsome. although I havent raced her much at all...

 

[turbo'dtalon1g]

Have fun breaking your tranny. Stock rev limiter is at 7500. It was set there for a reason. And yes without a bigger turbo you are just losing power. Honestly as long as you shift and your rpms don't drop below 3k you will have plenty of power throughout the gear.

 

[pinknuggit]

I have a 10k revlimiter on my 1g with a bone stock engine and 240k. I have shifted at 9 every time I raced for a long time, runnign 11's, but I buried it racing a bike last week and bent a valve on cylinder 3 at a hair over 10k. 9k is perfectly safe though, I have shifted as high as 9500 succesfully many times....but stick too 9 and you'll be fine.

Just because you do it, doesn't mean that it's safe and that you can advise others to.

I rev my stock 5.9 in my truck to 5700. It's definately not safe and i don't reccomend others do it.

The stock valvesprings in a 4g63 will hate life above 8k. Also, mitsubishi doesn't balance the rotating assembly that well from the factory. 9k on a stock engine is not safe in the least bit. Balance your rotating assembly and get some stout valvesprings and you can rev that high safely.
I think it's kind of funny (no offense) the way you worded that post. "yeah it's safe to rev to 9k, but i buried a valve doing it, but its perfectly safe". :laugh: I seriously doubt that you've been shifting at 9k all the time for 240k miles.

a 4g63 is not made to rev high. Sure, it can do it, but if you want to rev to 9k's, go buy a b16. They come stock with an 8500 rpm redline.