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10, 15, 20+ old vehicles: How fast is too fast?

  

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Topic starter

When it comes to older vehicles that are 10, 15, 20+ year old and higher mileage, how fast is too fast?


How fast is too fast, that the engine will blow?


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9 Answers
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When you start seeing & hearing this - 

https://youtu.be/j9V78UbdzWI


Lmao I like this video.


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I somehow knew, after reading the Pilot thread, that someone would make this thread.

 

There is no correct answer, so it is a waste of time to poll this. The Pilot owner had 230k miles on his car and decided to go 120mph with it. That's a bad decision because old, tired motors do not like being hammered on. It may have survived another 100k miles under normal driving conditions. There is no way to say "driving a car that is xx years old at xxx mph is too fast and you will blow the engine." There is, literally, no possible way to answer that. There are too many variables and every engine is different, they wear different, they've been maintained differently.

 

Perfect example: That Pilot blew up at 120mph and it was a 2010. But I've run my 1998 Z28 in the Texas mile competition at over 170mph without an issue. The difference? I built it to do it and have appropriate parts in place to prevent issues. So you have an old car from the 90's, with only 2k miles on the purpose-built drivetrain and 98% of the car, vs a 2010 with 230k miles on the original drivetrain that blew up.

 

I don't understand how this question could be answered. {black}:idontknow:  


You answered it! That’s how it is answered!

Think of the question and the poll as a means to seek opinions and discussion, but not necessarily a definite answer.

And by providing a prompt in such a way, people usually find reasons why it can’t be answered. And often times, that is the answer.

And you provided an excellent answer!


{black}:surprised: .......ok well I'm glad I could help then? {black}:laughingoutloud:


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too fast for what?

for me? the law? the car?


The impetus for this question came from another thread. A fellow blew his engine driving 120 mph on an older Honda Pilot.


How fast is too fast, that the engine will blow?


I don't know, it's not really an issue for me. I barely go faster than the speed limit because I can't afford to have my vehicle impounded. My speedo only goes to 100mph.

I imagine it depends on if it's a high performance vehicle or not.


What? Even a Mitsubishi Mirage speedo goes to 140mph... Joe needs some drama, who wants to give him a Mirage?


no thanks. I don't have a deathwish.


@mountainmanjoe {black}:laugh: And you are right...it does depend on the car. And a million other things. The question is unanswerable.


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Interesting question, here is my rather boring point of view:

75mph is the speed limit and I wouldn't risk my life anything above that. A car shouldn't have the engine fail just because of that speed. After you get to 85 90 you start getting tickets of 2 kind, 1. from the police and 2. free tickets to the afterlife. Plus you get worse gas mileage.

This question seems irrelavent to car reliability but rather safety, laws, and gas mileage. 65mph is downright slow if the engine doesn't blow up a semi will come behind you and end your life. 10 years of age isn't much either, if the engine blows up, thats totally either on the owner's care for the vehicle and/or the car's quality, not the speed of the vehicle. 


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Did anyone mention tires? I would be concerned with tires at "high" speeds as well as the engine.


Yup! Someone mentioned tires above. Tire rating speed is most definitely a concern.


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Topic starter

After seeing the other post about the Honda Pilot blowing an engine for going 120mph, it got me to thinking how fast is too fast.

Assuming we are not breaking any laws, I think RPM's are more of a limiting factor than sheer speed.  Suppose your car is at the sweet spot of RPM's and going really fast, it seems as though the engine would be blind to the actual speed.  

But suppose you are close or at redline for an extended amount of time, that may be more detrimental to an engine.  

This is just a guess.  I really don't know.


Thanks for these posts though they are somewhat pointless they do make us think.

I think that model year might have had cylinder deactivation and prone to oil consumption as well so engine problems are common with the VCT earthdreams designs.

I guess to be safe you shouldn't be going 120mph on the 405 tomorrow.


That's an interesting point with cylinder deactivation.

Often times, I see other post a dilemma on this forum, and I like to dig a little deeper to understand the why and how.

I'll keep it at 119mph.


The engine isn't the only consideration. My tires are only rated to 112 mph. What about all the other chassis and drivetrain components? Steering stability?
Every time you push your car to ridiculous speeds, the grim reaper drops what he's doing to watch you.


Ahh yes. Thanks for the other factors.


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That could be a good question for Germans.

https://www.youtube.com/watch?v=bh7J2KWE8Xw


ballsy. 300kph at NIGHT. Imagine a deer ran out in front.

Are you German?


Yep, it can be very nasty. No, I'm not.
https://www.youtube.com/watch?v=euTIioGgmPE


Gross. He vaporized the deer.


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All the following speeds are experience-based true gps-confirmed speeds:
Audi S4/S6 Avant (1993 C4 AAN 2.2 Turbo + chip): 160 kmh (100 mph) routine top long-time comfortable driving speed, 270 kmh (~170 mph) top achievable speed 
ML 55 AMG (2001 5,5l V8): 235 kmh (~ 150 mph) max. long-time comfortable driving speed, top speed not yet achieved.

Everything above the comfortable driving speeds I would consider too fast for me personally when driving these two cars on a good suitable road.


Thanks for your response. Can you describe what you mean by comfortable speed. What makes going faster than that speed uncomfortable?


I call it pucker factor


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"Can you describe what you mean by comfortable speed."
This is very subjective, I guess. For me, comfortable speed is a speed at which wind noise is still tolerable, while the car still retains directional stability as well as good tire contact with the ground despite normal interferences / disturbance factors like road surface imperfections or lateral wind.
In plain words, it is a speed at what I still feel that what I am doing is driving as opposed to racing.


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