Hit over 9K rpm on accident....
04-19-04, 05:05 PM
#1
Hit over 9K rpm on accident....
ok so i was coming off an exit ramp accelerating , when i was in 3rd gear at 7200rpm, i shifted into 2nd on accident. the rpms went over 9k, can anyone calculate the exact rpm for me? also could it have damaged anything? it was for 1 sec. i herd of some balance problems after 9k but thats continous , just wondering if anything could be damaged. thanks in advance.
04-19-04, 05:18 PM
#3
R1derful
Join Date: Feb 2004
Location: N Cali
Posts: 702
Likes: 0
Received 0 Likes
on
0 Posts
If you overrev by downshifting, a rev limiter will not save you. The wheels are forcing the engine to go at 9k+.
Many Celica GT-S owners have lost their engines this way. They rev it up to 7000+ in 3rd, clutch it, pull down on the shifter (thinking that they got 4th), pop the clutch, and BANG!!!!...they got 2nd and 10k RPM.
Fortunately for rotaries, they have no valve springs to float.
Sonny
Many Celica GT-S owners have lost their engines this way. They rev it up to 7000+ in 3rd, clutch it, pull down on the shifter (thinking that they got 4th), pop the clutch, and BANG!!!!...they got 2nd and 10k RPM.
Fortunately for rotaries, they have no valve springs to float.
Sonny
Last edited by Sonny; 04-19-04 at 05:20 PM.
04-19-04, 05:21 PM
#4
OOPS!!
You probably didn't hurt anything. Gear to rpm ratios are a straight line. It should be fairly easy to calculate if you check 2 speeds in 2nd gear. For example (estimates):
2nd gear 45mph ~ 4500 rpm
2nd gear 55mph ~ 6000 rpm
2nd gear 85mph ~ 10500 rpm
3rd gear 90mph ~ 7200 rpm
My guess is that you were around 11000 rpm if you were in 2nd at around 90 mph. It probably wasn't that high, but it may have been close.
You probably didn't hurt anything. Gear to rpm ratios are a straight line. It should be fairly easy to calculate if you check 2 speeds in 2nd gear. For example (estimates):
2nd gear 45mph ~ 4500 rpm
2nd gear 55mph ~ 6000 rpm
2nd gear 85mph ~ 10500 rpm
3rd gear 90mph ~ 7200 rpm
My guess is that you were around 11000 rpm if you were in 2nd at around 90 mph. It probably wasn't that high, but it may have been close.
04-19-04, 05:21 PM
#5
Originally posted by Sonny
If you overrev by downshifting, a rev limiter will not save you. The wheels are forcing the engine to go at 9k+.
Many Celica GT-S owners have lost their engines this way. They rev it up to 7000+ in 3rd, clutch it, pull down on the shifter (thinking that they got 4th), pop the clutch, and BANG!!!!...they got 2nd and 10k RPM.
Fortunately for rotaries, they have no valve springs to float.
Sonny
If you overrev by downshifting, a rev limiter will not save you. The wheels are forcing the engine to go at 9k+.
Many Celica GT-S owners have lost their engines this way. They rev it up to 7000+ in 3rd, clutch it, pull down on the shifter (thinking that they got 4th), pop the clutch, and BANG!!!!...they got 2nd and 10k RPM.
Fortunately for rotaries, they have no valve springs to float.
Sonny
Trending Topics
04-19-04, 05:38 PM
#10
Rotary Enthusiast
Join Date: Oct 2002
Location: S.Cali, OC!
Posts: 1,468
Likes: 0
Received 0 Likes
on
0 Posts
yeah right has anyone seen that send the rotary to hell video where the guy tries to intentionally blow the motor by revving it to like 9,000 and it doesnt pop for like 7 minutes
04-19-04, 06:26 PM
#12
wow 11k , thats pretty high i need to learn to shift better. i was kicking my own *** after it happend. glad the rotary handles high rpm well. if anything was damaged what could it be? i sat in my car and let it idle for a while and didnt notice any vibrations.
04-19-04, 07:47 PM
#14
I bet the downshift slowed you down a bit, too -- so if you were at 90 MPH and jammed it into second, you'll drop 5-10 MPH pretty quickly. Or you will lock up the rear wheels. I doubt you hurt anything, even if it was 90 MPH after you let out the clutch.
Godzilla is talking about your flywheel shattering from the tremendous stress that 11K RPM puts on the flywheel. That can be real bad for your legs.
-Max
Godzilla is talking about your flywheel shattering from the tremendous stress that 11K RPM puts on the flywheel. That can be real bad for your legs.
-Max
04-19-04, 09:07 PM
#15
The Power of 1.3
Join Date: Aug 2001
Location: Shrewsbury, Massachusetts
Posts: 2,837
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by Fd3BOOST
I doubt you hurt anything, dont you have a rev limiter? Why not set ot to 7800rom so you dont have to worry about it?
I doubt you hurt anything, dont you have a rev limiter? Why not set ot to 7800rom so you dont have to worry about it?
04-19-04, 09:18 PM
#16
you get off an exit that fast?!?!?!?!
jeez, hope you did that NOT during rush hour...
but yeah, i doubt you hurt anything, i mean if you "downshifted", you eventually braked right? unless you meant to shift it to 4th but accidently shifted to 2nd instead?
either way, you rev limiter saved you, i bet the car jerked right? otherwise, it would've bounced on the rev limit until you matched that speed..
jeez, hope you did that NOT during rush hour...
but yeah, i doubt you hurt anything, i mean if you "downshifted", you eventually braked right? unless you meant to shift it to 4th but accidently shifted to 2nd instead?
either way, you rev limiter saved you, i bet the car jerked right? otherwise, it would've bounced on the rev limit until you matched that speed..
04-19-04, 09:45 PM
#18
Place your ad here...
Originally posted by maxcooper
Godzilla is talking about your flywheel shattering from the tremendous stress that 11K RPM puts on the flywheel. That can be real bad for your legs.
-Max
Godzilla is talking about your flywheel shattering from the tremendous stress that 11K RPM puts on the flywheel. That can be real bad for your legs.
-Max
04-19-04, 11:09 PM
#20
Originally posted by ulost2my7
you get off an exit that fast?!?!?!?!
jeez, hope you did that NOT during rush hour...
but yeah, i doubt you hurt anything, i mean if you "downshifted", you eventually braked right? unless you meant to shift it to 4th but accidently shifted to 2nd instead?
either way, you rev limiter saved you, i bet the car jerked right? otherwise, it would've bounced on the rev limit until you matched that speed..
you get off an exit that fast?!?!?!?!
jeez, hope you did that NOT during rush hour...
but yeah, i doubt you hurt anything, i mean if you "downshifted", you eventually braked right? unless you meant to shift it to 4th but accidently shifted to 2nd instead?
either way, you rev limiter saved you, i bet the car jerked right? otherwise, it would've bounced on the rev limit until you matched that speed..
04-19-04, 11:39 PM
#22
Rotary Enthusiast
Originally posted by 4CN Air
why is it that peopel don't rev higher with our engines? i mean hp = tq x hp
is it that there is not enough flow? or too much heat?
why is it that peopel don't rev higher with our engines? i mean hp = tq x hp
is it that there is not enough flow? or too much heat?
04-20-04, 12:12 AM
#24
Eats, Sleeps, Dreams Rotary
Join Date: May 2003
Location: MIA
Posts: 3,639
Likes: 0
Received 0 Likes
on
0 Posts
Originally posted by boostin13b
Usually we run out of power. If you have the ports and the turbo to flow, then you can rev higher as long as you have power. Then you run into prolems like the Apex seals skipping. It all depends on the setup. Some of the N/A rotaries rev to the moon when they are bridge ported or periferral ported with carbon apex seals and what not.
Usually we run out of power. If you have the ports and the turbo to flow, then you can rev higher as long as you have power. Then you run into prolems like the Apex seals skipping. It all depends on the setup. Some of the N/A rotaries rev to the moon when they are bridge ported or periferral ported with carbon apex seals and what not.
+ The stock exhaust is high restrictive.
