mis shift 90mph 3rd to 2nd

[assa 98gsx]

So i went to the track today to test out the newly installed DSMLINK. Things went perfect, launched perfect, 1st, 2nd, 3rd.... it was around 95mph when I mis-shifted 3 to 2nd gear. All I see was a 10k+ RPM followed with the CEL triggered by the knock sensor.
I cruised all the way to the end and finished with 13.8 @ 92mph..
Anyway, does anyone think the motor would have any trouble? Everything seems fine after the mis-shift and I was really worried if I would blow the head gasket or bend the valves... but the car ran just as smoothe as before the track time. So... anyone think I toasted the motor?

 

[assa 98gsx]

Here is the priceless snapshot!

 

[DSMvroom]

oh dear! well see no evil, hear no evil right? Everything seems right as rain to me if you say it is just as smooth as before. Of course that isnt really necessarily true but for a moron such as myself, it's justification enough.

Didn't someone else on this forum recently downshift from 5->3 at like 130mph and blew up his clutch? I guess you were lucky that your gears were closer together.

 

[rdnek1112]

i think that you should drop in a 3 cyl 1 liter geo metro engine in it slap on a 20g turbo and ride.

 

[Jackyll]

I did the same thing when I first bought my gsx and was learning how to drive stick with it. I think it went up to 9800rpms... that was last may though, and she's still running like a champ

 

[Defiant]

If your balance shafts are still there, they got 20K+ out of that little excursion.

 

[spoolup]

I have seen a few friends have that happen to them, only 1 recieved any major damage. It also looks like you were getting quite a bit of knock before this incident occured. can you post the .dat file?

 

[dave99gst]

holy smokes thats alot of timing -

the over-rev prob didnt do anything - what is your rev-limit set to ?
im sure the knock was from dsmlink studdering @ what ever revlimit your set at.

 

[CanadianTSi]

I did that once, top of third...96ish mph and grabbed second. Registerd 9500rpms on the S-AFC, no I'll effects.

 

[assa 98gsx]

The timing was high because I did not apply throttle when it happened. Poeple on the dsmlink forum suggest me to check out the flywheel because most people would have flywheel problem after the mis-shift.
For people who are interested in the whole log. Here is the dat file. I had a few knocks before the bad mis-shift(6dgr knocks).
I adjusted the fuel but forgot to apply to the ECU while my car was on "ON" mode. Stupid mistake.
http://www.rit.edu/~axj3527/tuning/misshift.dat

 

[spoolup]

yeah I seen your post there earlier. Should have checked there first. .90 on the o2s is pretty low causing the knock. Take it your running stock 16* of timing. Thats a good thing with that much knock. I think I would follow their advise and redo the flywheel bolts, better to be safe than sorry. Worth the few hours of work.

 

[assa 98gsx]

WOW.. Defiant is definitly right on this one. I was taking the car to a friend's place to drop the tranny, turned out the belts broke on the way to the garage. The timing belt didn't brake, but I see 2 out of 3 acce. belts broke. I am not sure if the balance shaft is still there or not.. going to replace the belts and see if the loud "CLICKING" sound is still there.

 

[kobykris]

I've done it in the galant before. Luckily I reacted very quick and didn't even let the clutch out all the way. I still saw around 8800-8900RPM

If something ####ed up you would definetly hear the damage, otherwise your fine. We have been blessed with pretty hardy valvetrains from the factory.

 

[ECLIPSE4x4]

This exact same thing happened to me at the shootout a few years back. Unfortuneatly te rev limiter is not going to help the rotating mass once it falls into a lower gear.

I ended up spinning a rod bearing and didn't hear it until later. I first thought it was an injector clicking bad, later I dropped the pan and found the bearing in spun and in 3 pieces.

It may seem good now, but don't count n it.

 

[sstaylor]

I had the same thing happen to me last year and my flywheel exploded. Luckily I was not hurt but the accident took out my engine and transmission both. I have only had my car on the road for one weak now and still working out a few little bugs.

 

[CanadianTSi]

When I hit 9500 I was worried that I might have damaged something so I took it for another 1/4 mile pass...still trapped the same so I knew it was fine

 

[95Eclipse]

Same thing happened to me about 2 weeks ago I mis shifted from 3rd to 2nd when it happened it slowed me down as if I hit a wall, it happened pretty fast, but I heard all kind of noises in no more than a second, tranny grinding engine backfiring. I pulled over and everything seemed fine so I drove it as usual for about a week or two, 3 days ago I reved the engine to about 6K and noticed a loud "clanking" noise, the car still drives but it now starts clanking right after 4K RPM so I decided to put it in the garage, I'm pretty sure I spun a bearing too.
Hope that doesn't happen to you. but I'm sure you did hurt the engine in one way or another.

Hey ECLIPSE4x4 :
were you able to replace just the one bearing from under the car or did you have to pull the engine out?

 

[ECLIPSE4x4]

I am going to tell you what others told me.

I thought I could get away with just doing the bearings and everyone said it won't work.

Well I didn't listen and within 2 months I was pulling the motor.

Save you time and pull the crank, get it turned and redo the bearings. AND if your going to do that , you may as well do a full rebuild because you will have bearing material floating around the motor like I did and that debris ended up scoring the cylinder walls.

 

[laserdsm]

i missed 4th and went to 2nd threw all my belts off the motor (a\c powersteering belt , altinater belt ) replaced belts everything seems to be fine

 

[Arod]

I am going to tell you what others told me.

I thought I could get away with just doing the bearings and everyone said it won't work.

Well I didn't listen and within 2 months I was pulling the motor.

Save you time and pull the crank, get it turned and redo the bearings. AND if your going to do that , you may as well do a full rebuild because you will have bearing material floating around the motor like I did and that debris ended up scoring the cylinder walls.

A while back someone said they may have spun a bearing and I suggested they may have to get their crank turned and then someone else said that you shouldn't do that. I have never heard this before, and then they gave me negative feed back!!

But I agree don't just try replacing one bearing if it spun there will be pieces of metal all throughout the engine and they will stay in there and take out the rest of the bearings in a short amount of time.

 

[ECLIPSE4x4]

Negative feedback, I am lost on that one.

Why wouldn't you turn the crack? If a bearig goes.. more time then not the cracks will have marks and inturn detroy the new bearings.

Back on topic, I would highly doubt that your motor is fine. Just keep your ear tuned, it might not be today but it will be soon you hear something.

I am suprised I didn't float a valve. I blew every accessory belt off the motor going from 3rd back to second.

 

[1gp0wer]

It's a good idea not to turn the crank on our motors, because the bearings are hardened steel, and the hardened part is not very thick. Even with the turning process only taking off thousandths of an inch, it will remove much if not all of the hardened material, and weaken the crank, making it more susceptible to damage. You can get a used crank out of an old block that has never been modified for cheap enough that it's well worth your while not to refurbish the damaged one. As for the negative feedback, puhlease. Some people are just retarded and looking to knock peoples' reps down because they think they're 'righter' than you. One reason I'm not a fan of rep points myself.

 

[ECLIPSE4x4]

You think what you want, there is absolutly no reason you can't have the crank turned .010(within reason) and use a set of clevite bearings.