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   rec.autos.tech      Technical aspects of automobiles, et. al      117,728 messages   

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   Message 116,558 of 117,728   
   Jacob Jones to micky   
   Re: `red-lining   
   05 Mar 22 08:25:06   
   
   XPost: alt.home.repair   
   From: jkj33@gmail.com   
      
   On Sat, 05 Mar 2022 06:01:22 +1100, micky  wrote:   
      
   > In alt.home.repair, on Fri, 4 Mar 2022 17:26:57 +1100, Xeno   
   >  wrote:   
   >   
   >> On 4/3/2022 10:13 am, micky wrote:   
   >>> In alt.home.repair, on Fri, 04 Mar 2022 09:53:35 +1100, "Jacob Jones"   
   >>>  wrote:   
   >>>   
   >>>> On Fri, 04 Mar 2022 09:38:21 +1100, The Real Bev   
   >>>>    
   >>>> wrote:   
   >>>>   
   >>>>> On 03/03/2022 12:59 PM, Jacob Jones wrote:   
   >>>>>> On Fri, 04 Mar 2022 07:49:46 +1100, Bob F    
   >>>>>> wrote:   
   >>>>>>   
   >>>>>>> On 3/3/2022 12:03 PM, micky wrote:   
   >>>>>>>> In alt.home.repair, on Thu, 3 Mar 2022 12:47:28 -0600, Paul in   
   >>>>>>>> Houston   
   >>>>>>>> TX  wrote:   
   >>>>>>>>   
   >>>>>>>>> micky wrote:   
   >>>>>>>>>> Is red-lining worse, better, or the same when the engine is   
   >>>>>>>>>> driving   
   >>>>>>>>>> the   
   >>>>>>>>>> wheels as when the wheels are driving the engine?   
   >>>>>>>>>>   
   >>>>>>>>>> I use the engine to slow down when going down hill, and today,   
   >>>>>>>>>> for   
   >>>>>>>>>> example, I put the ATransmission into 2nd and then engine went   
   >>>>>>>>>> briefly   
   >>>>>>>>>> to 5500, the apparent red line.   For several seconds was at   
   >>>>>>>>>> 5000   
   >>>>>>>>>> and   
   >>>>>>>>>> even longer at 4500.   
   >>>>>>>>>   
   >>>>>>>>> I did that exiting the freeway in my last Toyota.   
   >>>>>>>>> It sucked a valve into the combustion chamber and broke a piston   
   >>>>>>>>> rod   
   >>>>>>>>> destroying the engine.  I gave it away to a needy person who   
   >>>>>>>>> installed   
   >>>>>>>>> a   
   >>>>>>>>> used engine and ended up with a nice car.   
   >>>>>>>>   So you're suggesting I shouldn't do it?   
   >>>>>>>>   Unless your freeway was going very steeply down hill, I would   
   >>>>>>>> think   
   >>>>>>>> you   
   >>>>>>>> came close to the redline even less time than I have!!   
   >>>>>>>>   This is a 2021 or 2022 Citroen C-3.  A rental with only 9000   
   >>>>>>>> miles on   
   >>>>>>>> it, so it must be new.   I think I bought the insurance, but   
   >>>>>>>> regardless,   
   >>>>>>>> I don't want to hurt the car.    mAYBE I shouldnt go lower than   
   >>>>>>>> 3rd   
   >>>>>>>> gear   
   >>>>>>>> and rely on the brakes for anything more.   
   >>>>>>>   
   >>>>>>> A motorcycle shop owner heard me downshift to slow as I approached   
   >>>>>>> his   
   >>>>>>> lot, and immediately told me that breaks were a lot cheaper to   
   >>>>>>> replace   
   >>>>>>> than engine and clutch.   
   >>>>>>   
   >>>>>> Rather a silly comment if you end up crashing because the brakes   
   >>>>>> overheat   
   >>>>>> and you can't stop.   
   >>>>>   
   >>>>> If that's happening you DESERVE to crash.   
   >>>>>   
   >>>>> Only once -- the very first time I drove down a mountain road -- did   
   >>>>> my   
   >>>>> brakes get too hot to stop as quickly as I wanted.  Lesson learned.   
   >>>   
   >>> I've heard that disk brakes don't overheat, and I think this Citroen   
   >>> has   
   >>> 4-wheel disks.   
   >>   
   >> *All* brakes are energy converters hence all brakes can potentially   
   >> overheat. Brakes, of any type, can only shed heat at a set rate. Exceed   
   >> the rate of heat input that the brakes can accommodate and you will   
   >> overheat any kind of brake system.   
   >>>>   
   >>>> Which is presumably why micky changed down.   
   >>>   
   >>> No, it was so that I'd use mostly the engine and use the brakes much   
   >>> less and have them in reserve if... if a child ran out in front of the   
   >>> car, for example, or a car pulled in front of me, or whatever.   
   >>   
   >> Change your driving habits!   
   >>>   
   >>> I had used the brakes so little at that point there was chance of   
   >>> overheating even drum brakes.   
   >>   
   >> I repeat, change your driving habits.   
   >>>   
   >>>> All he needs to do   
   >>>> is chang down earlier, before the steep drop, so it doesn't red line.   
   >>>   
   >>> That would have been next to impossible.   Thhe hills show up quickly   
   >>> and unexpectedly.   
   >>   
   >> Once again, change your driving habits. Better still, go take a   
   >> defensive driving course. Not for your benefit but the benefit of others   
   >> around you.   
   >   
   > You and Jacob can come with me the next time I make this trip, maybe in   
   > a few days, and then you'll have enough facts to maybe be in a position   
   > to tell me stuff like this.   
      
   We don't need to. There are no steep descents that don't have   
   a warning sign so you can change down before descending.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)   

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