Accidenly ran my car WAY past the redline today

tireburner163 · 12-24-2001, 05:33 PM

I was coming home from work today, I was haulin butt doin some corner carving. I was goin around a long left hander and I decided to kick it up and notch. I meant to move the geat selector from "OD" to "D", but I accidently moved it to second. Well I was going like 3500 in "OD" and my car relines at 5000. Anyway the tach peged past 6000. It was only there for a few seconds but it still scared the crap out of me, I spend 15 min. checking over the car to make sure every thing was Ok.

Have any of you guys ever done anything like this before?

RAGE_5.0 · 12-24-2001, 05:35 PM

well i hit about a little over 7k on my 1990 gt
i missed 2nd gear(foot to fast for hand) adn it also scared the **** out of me
every thing seemed ok after it it was there for prolly a second

Crazy Horse GT · 12-24-2001, 05:37 PM

ouch! you didnt have any valve clatter or anything, did you? does it seem ok? no tranny slip or anything?

HiFlow5 0 · 12-24-2001, 05:58 PM

the 4 cyl redlines pretty early compaired to my GT. i have had my auto 4 cyl up to 5600 before and nothen has happened.

1BAD89 · 12-24-2001, 06:48 PM

Quote:

well i hit about a little over 7k on my 1990 gt

If you were stock, then it didn't go over 6250rpm. tac might have read 7 but rev limiter is set at 6250.

Unit 5302 · 12-25-2001, 01:42 AM

I routinely ran my 4 banger past all the numbers on the tach for lengthy time frames, in one case, 15minutes straight. Hehehe.

6T9PONY · 12-25-2001, 01:47 AM

Unit.....that's not healthy.

Topless In Texas · 12-25-2001, 02:31 AM

eek! eek!

Rev · 12-25-2001, 12:14 PM

If the RPM's go high enough to float the valves, the valve springs are over heated and over stressed. This is supposed to permanently weaken the valve springs, allowing the valves to float at a lower RPM the next time. This is said to create a vicious circle necessitating replacement of valve springs.

I try never to let mine go over 6000. Theres nothing to be gained after 5500 anyway with my current set up that power peaks at 5100. I'm hoping for a little higher RPM power peak and more HP with my new TFTW stage 1 heads and 1.7 rr's.

Rev

Mach 1 · 12-25-2001, 12:31 PM

Relax!

Factory rev limits are on the conservative side. I think ive over reved every car Ive ever owned and never had any problems what so ever. The manufacters dont build these things to self destruct with a few extra revs now and again.

HellRaiser92 · 12-25-2001, 04:04 PM

lol yeah I agree with Mach 1. I have a 92 4 banger too. These motors are stronger than you think! Mine has been through hell and back with no problems at all.

Unit 5302 · 12-25-2001, 07:13 PM

I did have a spare engine laying around for it should something have given way. That and I was forced to overrev when 3rd and OD went out. Pile o crap A4LD automatic.

Yes, factory rev limits are conservative for the engine throwing itself apart, (unless you own a GM which may bend every pushrod in the engine should you even hit the redline, lol) but overreving still causes issues for longevity.

Mercury · 12-26-2001, 02:05 AM

Man, when the throttle hung at Wide open on my old 289, My a$$ puckerd, especially when it hit 6200 RPMS (that was the last I looked at the tach, before the throttle came off the floor.). It held at least a 6000 RPM blast for 20-30 seconds.

Another time, My car had a vaccum leak and was hard to crank, so I popped the hood, and told my friend to start it up. It didnt, I told him to give it "A LITTLE GAS".

Well, he floored it and it cranked. That Mill screamed. I dove from underneath the hood expecting it to blow. He promptly shut it down when He saw me do an Action Hero Movie star Dive from out of the hood. Then asked if its bad when the needle on the "Tach THINGY" goes up between 6 and 7.

I usually shift it at 5200 when racing.

Mach 1 · 12-26-2001, 11:22 AM

I dont think an occasional over rev or two is any concern for longevity eithier.

Obviously you dont want to over rev you engine on a regular basis, but a few times shouldnt be of concern to the life span of a well maintained engine.

Coupe Devil · 12-26-2001, 11:46 AM

Quote:

Originally posted by 1BAD89

If you were stock, then it didn't go over 6250rpm. tac might have read 7 but rev limiter is set at 6250.

My throttle hung on my 90 also after I did the rebuild. It stuck up to about 7000. I was scared. It had never happened before. I was driving with the cruise on. I hit the button to turn it off and clutched it at the same time. I was rollling into an off ramp. I clutched it and the r's went up. the pedal was stuck and I couldnt get it off. I shut the motor off with the key. Coasted to the top of the hill ande spent about 15 minutes checking it over like you did. But it did no damage. And it was on a new motor. Only about 700 miles on it when that happened.

Brad

70_Nitrous_Eate · 12-26-2001, 04:35 PM

Well, I once missed 3rd whilst powershifting on the bottle at our local track..

Reminds me "the night before christmas"....when I arouse from my drivers seat to hear such a clatter...

Damage: 3 bent pushrods, 1 colapsed lifter, 1 broken rocker arm.

I'm unsure how high she went, but I'm guessing somewhere in the 7500-8000RPM range.

RAGE_5.0 · 12-26-2001, 05:19 PM

damn that sucks

6T9PONY · 12-26-2001, 07:30 PM

I've never had my 351 up past 6000....revved it up just under that once, accidentally, but it ran fine and didn't make any noise....so I just babied it the rest of the night.

fixer · 12-27-2001, 01:09 AM

If you wanna check for any bent valves etc take your coil wire off and crank it over.

Listen for smooth cranking rpm's. In other words, listen for a normal sounding motor cranking over.

If the rpm is all over the place then you might have bent some valves or push rods.

But if the car runs ok and there is no audiable noise either at idle or cruise, then i wouldn't sweat it.

mustangman65_79 · 12-31-2001, 07:48 AM

I took my 4 banger over 7000 one time. I was passing an old lady on a short passing lane, left it in second doing over 75mph. My motor shodowed my mph exlacty, so if I was going 75 in second, I was doing 7500 rpm's. I fiqured it out when I thought I was hearing a strange niose from the motor, finally shifted to third. A month later my motor ate oil like crazy. A quart a week. Not good. Now I'm putting in a 302.

12-24-2001, 05:33 PM	#1
tireburner163 It's a lot like a race car Join Date: Aug 2000 Location: Meridian, MS Posts: 4,130	Accidenly ran my car WAY past the redline today I was coming home from work today, I was haulin butt doin some corner carving. I was goin around a long left hander and I decided to kick it up and notch. I meant to move the geat selector from "OD" to "D", but I accidently moved it to second. Well I was going like 3500 in "OD" and my car relines at 5000. Anyway the tach peged past 6000. It was only there for a few seconds but it still scared the crap out of me, I spend 15 min. checking over the car to make sure every thing was Ok. Have any of you guys ever done anything like this before? __________________ 1987 Buick T-type 1998 HD Electra Elide

12-24-2001, 05:35 PM	#2
RAGE_5.0 Registered Member Join Date: Jul 2001 Location: Leamington, Ontario, Canada Posts: 767	well i hit about a little over 7k on my 1990 gt i missed 2nd gear(foot to fast for hand) adn it also scared the **** out of me every thing seemed ok after it it was there for prolly a second __________________ Black 1990 Cobra Mac offroad H pipe, Hooker aerochambers , k&n bunch of stuff that I'm to lazy to type out sitting in my room

12-24-2001, 05:37 PM	#3
Crazy Horse GT Registered Member Join Date: Aug 2001 Location: Sale Creek, TN. C. S. A. Posts: 4,652	ouch! you didnt have any valve clatter or anything, did you? does it seem ok? no tranny slip or anything? __________________ 95 gt vert, lot's of stuff, it aint slow. 04 sonic blue v - six my beater 89 rs camaro iroc turbo hood, other stuff, my wifes ride 84 lx stang cammed up 289 hi po, etc 65 falcon, maybe by the year 2020. black 00gt, gone but never forgotten. R H C- member # 1 o.b.c. da prez- member # 1 if your under 40 dont ask. goodbye for now odie,r.i.p. 11-27-03

12-24-2001, 05:58 PM	#4
HiFlow5 0 Registered Member Join Date: Mar 2000 Location: Springfield, Ma, usa Posts: 706	the 4 cyl redlines pretty early compaired to my GT. i have had my auto 4 cyl up to 5600 before and nothen has happened. __________________ NewEngland Auto www.baystategearheads.com -91 Mustang Coupe, ex 4cyl (sold) -99 F150, 3" lift, 35" Procomps, Magnaflow exhaust

12-25-2001, 02:31 AM	#8
Topless In Texas Not broken anymore! Join Date: May 2001 Location: La Porte, TEXASS :) Posts: 1,963	:O eek! eek! __________________ R.I.P. my Kinde..Jan. 19,1992-Aug. 22, 2003. Shes Cruisin' doggie heaven in a Blown Verte or a GTO!!! 2005 ROUSH GT Verte SuperStallions of the Net Feature, May 2002 RICE HATERS CLUB MEMBER #38!! O.B.C #5..thank you!! I feel so priveledged!! BONE STOCK~ Hell, its a ROUSH!

12-25-2001, 01:42 AM	#6
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	I routinely ran my 4 banger past all the numbers on the tach for lengthy time frames, in one case, 15minutes straight. Hehehe.

12-25-2001, 01:47 AM	#7
6T9PONY All about the Windsor. Join Date: Feb 2000 Posts: 2,052	Unit.....that's not healthy.

12-25-2001, 12:14 PM	#9
Rev Registered Member Join Date: Nov 1998 Location: Houston, Tx. Posts: 3,887	If the RPM's go high enough to float the valves, the valve springs are over heated and over stressed. This is supposed to permanently weaken the valve springs, allowing the valves to float at a lower RPM the next time. This is said to create a vicious circle necessitating replacement of valve springs. I try never to let mine go over 6000. Theres nothing to be gained after 5500 anyway with my current set up that power peaks at 5100. I'm hoping for a little higher RPM power peak and more HP with my new TFTW stage 1 heads and 1.7 rr's. Rev __________________ '66 Coupe, 306, 350-375 HP, C-4, 13.07 e.t., 104.8 mph, 1/4 mi. O.B.C. #2 '66 coupe

12-25-2001, 12:31 PM	#10
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	Relax! Factory rev limits are on the conservative side. I think ive over reved every car Ive ever owned and never had any problems what so ever. The manufacters dont build these things to self destruct with a few extra revs now and again. __________________ 2002 GT 1993 GT (SOLD) '93 Mustang GT RHC member #142

12-25-2001, 04:04 PM	#11
HellRaiser92 Registered Member Join Date: Apr 2000 Posts: 104	lol yeah I agree with Mach 1. I have a 92 4 banger too. These motors are stronger than you think! Mine has been through hell and back with no problems at all. __________________ 92LX 2.3ltr 5 speed Air Silencer removed, K&N Filter, Straight Pipe

12-25-2001, 07:13 PM	#12
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	I did have a spare engine laying around for it should something have given way. That and I was forced to overrev when 3rd and OD went out. Pile o crap A4LD automatic. Yes, factory rev limits are conservative for the engine throwing itself apart, (unless you own a GM which may bend every pushrod in the engine should you even hit the redline, lol) but overreving still causes issues for longevity.

12-26-2001, 02:05 AM	#13
Mercury The Redneck James Bond Join Date: Sep 2000 Location: Fayetteville NC Posts: 1,707	Man, when the throttle hung at Wide open on my old 289, My a$$ puckerd, especially when it hit 6200 RPMS (that was the last I looked at the tach, before the throttle came off the floor.). It held at least a 6000 RPM blast for 20-30 seconds. Another time, My car had a vaccum leak and was hard to crank, so I popped the hood, and told my friend to start it up. It didnt, I told him to give it "A LITTLE GAS". Well, he floored it and it cranked. That Mill screamed. I dove from underneath the hood expecting it to blow. He promptly shut it down when He saw me do an Action Hero Movie star Dive from out of the hood. Then asked if its bad when the needle on the "Tach THINGY" goes up between 6 and 7. I usually shift it at 5200 when racing. __________________ 64 1/2 "D" code Red Mustang Coupe. Red Baron, 2000 Perf Red Mustang GT. 5spd. Stage 2 CNC heads with Large Valves, Comp Cams (270-274 dur .550 lift), Forged Crank, DRP pistons, Manly H-beams, Pro M 87 mm Mass Air, 24lb Inj, 75mm TB, Plenum Spacer ,Long Tube Headers, Homemade H-pipe, 2 chamber Flows, 4:10's, Steeda Tri-Ax, LKW 70/30's, Eibach Drag Springs, Steeda SubFrames, Battle Boxes, Rear Girdle, Adj uppers, Alunimum Drshft, Southside Lift Bars. Project Cars, 64 1/2 6cyl coupe, 1930 Model A Nostalgia Rod.

12-26-2001, 11:22 AM	#14
Mach 1 Registered Member Join Date: May 1999 Location: Georgia Posts: 3,866	I dont think an occasional over rev or two is any concern for longevity eithier. Obviously you dont want to over rev you engine on a regular basis, but a few times shouldnt be of concern to the life span of a well maintained engine. __________________ 2002 GT 1993 GT (SOLD) '93 Mustang GT RHC member #142

12-26-2001, 04:35 PM	#16
70_Nitrous_Eate Registered Member Join Date: Dec 2001 Location: Kelowna BC, Canada Posts: 82	Well, I once missed 3rd whilst powershifting on the bottle at our local track.. Reminds me "the night before christmas"....when I arouse from my drivers seat to hear such a clatter... Damage: 3 bent pushrods, 1 colapsed lifter, 1 broken rocker arm. I'm unsure how high she went, but I'm guessing somewhere in the 7500-8000RPM range.

12-26-2001, 05:19 PM	#17
RAGE_5.0 Registered Member Join Date: Jul 2001 Location: Leamington, Ontario, Canada Posts: 767	damn that sucks __________________ Black 1990 Cobra Mac offroad H pipe, Hooker aerochambers , k&n bunch of stuff that I'm to lazy to type out sitting in my room

12-26-2001, 07:30 PM	#18
6T9PONY All about the Windsor. Join Date: Feb 2000 Posts: 2,052	I've never had my 351 up past 6000....revved it up just under that once, accidentally, but it ran fine and didn't make any noise....so I just babied it the rest of the night.

12-27-2001, 01:09 AM	#19
fixer Registered Member Join Date: Aug 1999 Location: mesa,az,usa Posts: 457	If you wanna check for any bent valves etc take your coil wire off and crank it over. Listen for smooth cranking rpm's. In other words, listen for a normal sounding motor cranking over. If the rpm is all over the place then you might have bent some valves or push rods. But if the car runs ok and there is no audiable noise either at idle or cruise, then i wouldn't sweat it.

12-31-2001, 07:48 AM	#20
mustangman65_79 My poor 79 RIP Join Date: Oct 2001 Location: Suisun City, Posts: 2,320	I took my 4 banger over 7000 one time. I was passing an old lady on a short passing lane, left it in second doing over 75mph. My motor shodowed my mph exlacty, so if I was going 75 in second, I was doing 7500 rpm's. I fiqured it out when I thought I was hearing a strange niose from the motor, finally shifted to third. A month later my motor ate oil like crazy. A quart a week. Not good. Now I'm putting in a 302. __________________ '84 mustang GT turbo '85 LTD '89 Camaro Irocz z28 '94 Lightning '96 Trans am

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