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View Full Version : actual effects of revving high (4.5)?



supra97rx7
02-24-2008, 04:08 AM
granted, 4500rpm isn't too high, but what are actual effects of daily driving this way?

my engine has 189,89x miles currently, and it sounds, and seems to drive very strongly.

would it lead to significantly earlier engine death, as opposed to shifting at ~3000rpm?

celicaGT90_05
02-24-2008, 04:26 AM
considering my motor now has over 220k and has seen 5500 many times, you should be just fine. Granted, mine is a 5SFE and I beleive yours is the 4AFE, still it should be able to handle 4500 fine, it shouldnt hurt anything

MrWOT
02-24-2008, 04:28 AM
Load increases with the square of the velocity. Your conrod bolts will only take so much abuse before they let go. Almost every time I see someone throw a rod it was either loss of oiling, or the bolts let go. Actual failure of the conrods themselves takes a much longer time unless there are casting errors or bad design. Largely roulette.

celicaGT90_05
02-24-2008, 04:32 AM
although higher RPM is in a sense more strenuous, it also blows out carbon which can all the same cause early engine failure. Previous owner floored my car constantly, but it is as clean as can be and takes forever for any carbon to build up in the oil. It does have its ups and downs. But why exactly would you drive shifting at 4500 daily? It also uses more gas doing that

supra97rx7
02-24-2008, 04:54 AM
although higher RPM is in a sense more strenuous, it also blows out carbon which can all the same cause early engine failure. Previous owner floored my car constantly, but it is as clean as can be and takes forever for any carbon to build up in the oil. It does have its ups and downs. But why exactly would you drive shifting at 4500 daily? It also uses more gas doing that

well, i suppose it's not daily, like constantly. but maybe once everyday, i'll just feel like doing some "spirited" driving. most of the time i'm behind someone so i just shift at 3k anyway.

mrwot, if i were to simplify what you said into a two word thesis, would i be right in taking "largely roulette" from it?

MrWOT
02-24-2008, 05:12 AM
Yup. Metal fatigues and it will give out eventually, no matter how much you baby it.

Mr Celica
02-24-2008, 05:29 AM
i drive my celica like its going to explode under 4500k. very spirited driving seeing redline a lot, and still no problems. oil changes (syn-tec) regularly and the level kept an eye on, its still running perfect. but, like said before, you go through gas quicker.

Blackcloud
02-24-2008, 05:50 AM
mine would blow up if it got that high :hehe:

tuner4life
02-24-2008, 06:06 AM
My 4afe Geo Prizm has 235,000mi and it is always running at over 4500rpms, and also the automatic tranny in it doesnt have overdrive so at highway speeds it will run at over 3.5k for hours and it looks cleaner inside the motor than many cars i've seen w/ 100k.

So anyways, youre fine shifting at 4500, just take care of the motors well being (maintenance) and it will be fine.

Cavanagh
02-24-2008, 06:06 AM
I would occasionally would floor it, maybe once a month. Though i babied my celica like none other. It seemed to take the redlining fine, though it just made more noise than it did actually go. :hehe:

celicaGT90_05
02-24-2008, 06:11 AM
^ thats because power curves tend to drop drastically right around redline

ciento44
02-25-2008, 02:16 PM
If your car blows up revving to 4500, it's not because it was revving to 4500.

bzdweezy
02-25-2008, 06:42 PM
My 4afe Geo Prizm has 235,000mi and it is always running at over 4500rpms, and also the automatic tranny in it doesnt have overdrive so at highway speeds it will run at over 3.5k for hours and it looks cleaner inside the motor than many cars i've seen w/ 100k.

So anyways, youre fine shifting at 4500, just take care of the motors well being (maintenance) and it will be fine.


yeah i heard that long trips are good for burning or clearing carbon out of the engine is that true?

extremeskillz
02-25-2008, 06:49 PM
mine would blow up if it got that high :hehe:
Whats ur redline like 3500 or 4000k? :hehe:

celicaGT90_05
02-25-2008, 07:38 PM
If your car blows up revving to 4500, it's not because it was revving to 4500.

its a joke since he drives a diesel, they dont have much of an RPM range

ciento44
02-25-2008, 08:18 PM
its a joke since he drives a diesel, they dont have much of an RPM range


Lol....... :zombie:

Toy_Celi
02-25-2008, 08:34 PM
you gotta think about it.... diesels rely on the length of the cylinders for compression, which allows them to burn wierd stuff because a lot of things are unstable at such compression, so if your revving it, your not going to go to high, there is too much to happen to have 5-9k rpms..... its pretty cool when you think about it :D if diesel gas wasnt more than premium gas, id have one :D

ciento44
02-25-2008, 08:35 PM
you gotta think about it.... diesels rely on the length of the cylinders for compression, which allows them to burn wierd stuff because a lot of things are unstable at such compression, so if your revving it, your not going to go to high, there is too much to happen to have 5-9k rpms..... its pretty cool when you think about it :D if diesel gas wasnt more than premium gas, id have one :D


Oh 4 realz? I had simply no idea....

Guys... i was referring to the 4afe. If it blows up at 4500rpms, it's because there's something else wrong with it, or it has eleventy-billion miles on it.

celicaGT90_05
02-25-2008, 08:59 PM
Oh 4 realz? I had simply no idea....

Guys... i was referring to the 4afe. If it blows up at 4500rpms, it's because there's something else wrong with it, or it has eleventy-billion miles on it.

ohh I thought you was referring to PC since he said his would blow up, and then you said blow up lol my bad. But even if it has "eleventy-billion" miles on it and theres nothing wrong, it'll still do the 4500 just fine. If it cant, then no matter what the mileage something was just wrong.

ciento44
02-25-2008, 09:15 PM
ohh I thought you was referring to PC since he said his would blow up, and then you said blow up lol my bad. But even if it has "eleventy-billion" miles on it and theres nothing wrong, it'll still do the 4500 just fine. If it cant, then no matter what the mileage something was just wrong.

Lol, no biggie... I just found it funny that two people figured that's what i was saying. :P

But as was referenced earlier in the thread, even with regular maintenence, metal stresses, stretches, and gets weaker.

I'm sure it's not miles tthat will be attainable for something else goes, even due to unintentional neglect, but if an un-rebuilt 4afe had say 1 million miles on it, i wouldn't want to rev that thing to 4500, regardless of how well it's been cared for.

Well... yeah... check that. I would rev it. :)

supra97rx7
02-28-2008, 05:59 AM
now that i have read quite reassuring answers, i won't feel bad during my joy rides. :wiggle:

sort of off topic question: while turning and accelerating quickly (but not too hard) my front tires lose traction pretty easily, and even when i'm not on the gas at all, it'll lose traction and understeer. do you guys find this to happen, or are my tires bad or something?:wtf: (excluding wtf. i just wanted the question face)

MrWOT
02-28-2008, 06:21 AM
Check your mounts, they can cause this (when accelerating)

Frenchy
02-28-2008, 05:13 PM
To add nothing to this thread, I think diesels don't normally rev past the 1.5k rpm range, or something like that...

ciento44
02-28-2008, 05:15 PM
To add nothing to this thread, I think diesels don't normally rev past the 1.5k rpm range, or something like that...


That's a bit of an exaggeration, but a very amusing stereotype. :hehe:

juggernaut
02-29-2008, 01:22 AM
To add nothing to this thread, I think diesels don't normally rev past the 1.5k rpm range, or something like that...
under light acceleration, they reach 1500-2000 depending on the engine.
i had a 1983 mercedes diesel almost a year ago. 3.0L 5 cylinder turbocharged. from factory it shifted 2nd-3rd at 4000 rpm. i brought it up to 5500 rpm every once n a while. gave it a good whippin'. those cars allegedly rev to 6400 rpm or so on stock internals, but i wasnt willing to risk it. anyways its the highest revving diesel ive ever heard of.

revv_head
03-06-2008, 07:04 AM
To add nothing to this thread, I think diesels don't normally rev past the 1.5k rpm range, or something like that...

Nah it's actually for diesels they don't normally rev above 0.5K and redline is 1.5K

ciento44
03-06-2008, 04:12 PM
Nah it's actually for diesels they don't normally rev above 0.5K and redline is 1.5K


I'd like a side order of fries with that gross misinformation, my friend.

VikingJZ
03-06-2008, 04:45 PM
I've never heard of any vehicle with that low of a redline.


Try in the 30's mang

ciento44
03-06-2008, 04:49 PM
Maybe like... a diesel generator?

Maybe a diesel train?

Diesel powered ocean liner?

VikingJZ
03-06-2008, 04:51 PM
Perhaps^

But on a common diesel truck....no. I'm not sure what actual redlines are. My friend's Cummins that he's rebuilding is 3,000 something. No more than 4K though.

oldschoolst165
03-06-2008, 10:08 PM
4500 for me is economical driving my 3sgte sees 7200 every day it is 167000 mi with new rod,main bearings standard and new rings also standard about 20000 mi ago. Drive it like you stole it its a Toyota!

revv_head
03-07-2008, 11:10 AM
Dudes it was a stereotypical joke! lol im not actually retarded.

celicaGT90_05
03-07-2008, 06:24 PM
I'd like a side order of fries with that gross misinformation, my friend.

mmm fries....but yes, do you know how many gears a regular diesel pick up would have to have if the redline were at 1.5? Also, hard to tell if you're joking if you dont make it apparent, this is internet you know, we cant see your facial expressions or detect your sarcasm

ciento44
03-07-2008, 06:30 PM
mmm fries....but yes, do you know how many gears a regular diesel pick up would have to have if the redline were at 1.5? Also, hard to tell if you're joking if you dont make it apparent, this is internet you know, we cant see your facial expressions or detect your sarcasm

He was apparently joking. I didn't know him well enough to be sure, so i was just being my usual asshole self. :)

Don't take me seriously, unless i'm flaming on Ricksta or ToyCeli.

celicaGT90_05
03-07-2008, 06:33 PM
well I got that he was apparently joking, which is why I stated we just couldnt tell. Usually people who are joking will put something at the end like an emoticon or word it a certain way, but it looked like he was serious

revv_head
03-08-2008, 12:46 AM
Okay sorry lol. :P It was ment to be so n00bs got misimoformed while the more knowlegeble folks took it as a joke.

Luda
03-08-2008, 01:02 AM
i did some research today

and i found out, then when i take it our 4500rpm

i go faster....


freaking weird

Blackcloud
03-08-2008, 01:43 AM
I idle at 527rpms. freeway @ 75mph im doing 1300rpms

heavy acceleration ill get to about 3500rpms, 31lbs boost, and 1700deg egts :hehe:

celicaGT90_05
03-08-2008, 01:50 AM
Okay sorry lol. :P It was ment to be so n00bs got misimoformed while the more knowlegeble folks took it as a joke.

wait, so if you was trying to misinform...is it really a joke? lol

MrWOT
03-08-2008, 06:46 AM
/thisthread it's way off topic

supra97rx7
03-08-2008, 07:41 AM
eh. that's alright. it seems i got my answer already.