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Check this out - no damage after missed shift

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Old Jul 1, 2005 | 02:22 AM
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Default Check this out - no damage after missed shift

Yep, I should have bought a lottery ticket. Missed the 1-2 shift last winter, spinning the engine to 7000RPM for AT LEAST 4-5 seconds. Today I was replacing pushrods and springs for a upcoming cam swap. I was EXTREMELY suprised that all 16 pushrods are arrow-straight as are the valves.
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Old Jul 1, 2005 | 04:10 AM
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Originally Posted by Schantin
Yep, I should have bought a lottery ticket. Missed the 1-2 shift last winter, spinning the engine to 7000RPM for AT LEAST 4-5 seconds. Today I was replacing pushrods and springs for a upcoming cam swap. I was EXTREMELY suprised that all 16 pushrods are arrow-straight as are the valves.
One day I was on the freeway with a loose shifter handle. I wasnt paying attention to how fast I was going and dropped it into 3rd, didnt like the way it felt and wanted more so I went to second not realizing I just took 3rd to 80mp, so thats **** up number one, so im on my way back to 3rd get off the clutch and im really in 1st. Boy was I scared shitless.
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Old Jul 1, 2005 | 09:19 AM
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i had a similar incident when i first got my car - it was my first manual transmission car and i went for a 5th to 3rd shift without going through 4th - i went to the left just a tad too much and found 1st at about 55 mph for a few seconds - boy was my car angry at me at the time but as with your instance - nothing bent or broke - got real lucky
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Old Jul 1, 2005 | 10:48 AM
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Shew...

You probably want to chanve the timing chain when you are in there.
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Old Jul 1, 2005 | 10:53 AM
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Originally Posted by Schantin
Yep, I should have bought a lottery ticket. Missed the 1-2 shift last winter, spinning the engine to 7000RPM for AT LEAST 4-5 seconds. Today I was replacing pushrods and springs for a upcoming cam swap. I was EXTREMELY suprised that all 16 pushrods are arrow-straight as are the valves.
So that was on a stock valve train? With an upgraded valve train you can run 7000 rpm all day without hurting anything.

One day I was taking an on ramp at full thottle. I took it easy in 1st gear but did the 2nd to 3rd shift at 7000 rpm; except I missed 3rd and hit 1st! The rear tires were both skidding, so I imediatly knew what I did and pushed in the clutch and went to 3rd. So that must have forced the rpm well past 7000 rpm. It didn't hurt anything, but I have oversize, hardened pushrods and Katech rod bolts.
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Old Jul 1, 2005 | 10:55 AM
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I missed second coming out of first in my 98 Z28 and that is why I have my 2000 Z28 now, lol.
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Old Jul 1, 2005 | 11:11 AM
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Originally Posted by PSYKOZ28
I missed second coming out of first in my 98 Z28 and that is why I have my 2000 Z28 now, lol.
So you hit neutral with it floored? If so, that should not have hurt the engine since the rev limiter saves you in a case like this.
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Old Jul 1, 2005 | 11:29 AM
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Originally Posted by PSYKOZ28
I missed second coming out of first in my 98 Z28 and that is why I have my 2000 Z28 now, lol.
not quite sure how this would have damaged your motor....
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Old Jul 1, 2005 | 08:30 PM
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maybe he hit reverse!??!?1
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Old Jul 1, 2005 | 11:17 PM
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was thinking the same you can hit the normal rev limiter without effects, its the mechanical over reving that kills.
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Old Jul 2, 2005 | 05:12 AM
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Yeah I'm not seeing how you would have caused any damage. Missing the 1-2 doesn't do anything. It's when you miss 3rd and go into 1st, or miss 4th and go into 2nd, that you will mechanically overrev the engine and damage stuff.

If you just missed 1-2 (which is extremely hard to do anyway), I'm assuming you just went to neutral and bounced off the rev limiter which prevented any damage.

*shrug*

Dope
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Old Jul 4, 2005 | 01:31 AM
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What would most likely break over reving i was racing one time and i was at the top of 3rd and instead of going to 4th i went into 2nd but quickly pushed the clutch in and went to neutral.
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Old Jul 4, 2005 | 02:37 AM
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Originally Posted by XpEdItIoUs
What would most likely break over reving i was racing one time and i was at the top of 3rd and instead of going to 4th i went into 2nd but quickly pushed the clutch in and went to neutral.
If the RPM is high enough rods can fail, valavesprings, valves touching pistons, pushrods bending/breaking. You can **** up a lot of **** and it gets real expensive.
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Old Jul 4, 2005 | 04:37 PM
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My car idles normally and drives ok the only thing i notices after that happend is my steering wheel feels like it gets stuck when turning could my power steering pump gotten messed up by over reving.
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Old Jul 4, 2005 | 05:59 PM
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Could just be the steering shaft hitting one of your header primaries? Check for clearance.

Dope
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Old Jul 4, 2005 | 07:47 PM
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I was in 6th gear once and went to shove it in third and it went into first. seems like i hit 10k rpms the way the engine sounded, like an indy car. i bent alot of valves that day. i think the problem was my shift ****. i changed the shift **** that day from round to regtangular. i went back to round and all is good
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Old Jul 5, 2005 | 08:39 AM
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I missshifted pretty bad once at the track, the car definitely hated me for those couple of seconds! Made a big bang, but we just did a heads/cam swap on my car and all of my stock stuff looked perfect in every way.

I thought for SURE i would have a bent pushrod or something for how bad it was...
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