Warm up for sport cars required?

[SimonTan]

I have seen and heard many time....the sporty cars owner just revved their engine and speed off straight from starting their cars.

While we were taught to drive gently for the initial period to warm up the engine, and also the fact is the greatest engine wear is during start up.

 

So cold revving of sport cars n quick acceleration will wear out the engine!

So is it worth it to buy second sportcars?

 

The sane thought I have on Harley motorcycles, these weekends bikers...usually rev and shoot off when the engines are cold.

 

Some say their are rich to pay for repairs, some say the low mileage will not cause the wear n tear to be significant.

 

Any one with comments n discussion?

 

[Firestorm78]

In the past, when cars had carburetors that used a smog and choke control that were not computer controlled, one had to let the engine warm up otherwise it would stall and could have trouble restarting due to the lean emissions requirements of the day.

 

Now, fuel injection and ECUs have made that ritual obsolete and any actions to place your car stationary for 5 min to warm up before moving off is just plain wastage of petrol and contributes to global warming.

 

Be it bread and butter or performance cars, just drive off slowly (keep around 3000rpm max rather than the speed...it's the rpm that matters not the speed) for about 2 minutes or so. After that, one can just cruise accordingly. Those with oil temperature gauges fitted in their cars...usually can wait till temperature about between 75deg to 90deg before doing any hard acceleration.

Edited June 19, 2011 by Firestorm78

[Mockngbrd]

Old car yes, modern cars no. But I disagree that all fuel injected cars don't need warming up. I got a 23yr old fuel injected engine that does need warming up, can still be driven but it'll be boggy until engine warms up. Even M engine will not be able to redline till warmed up.

[Wizzercool]

So cold revving of sport cars n quick acceleration will wear out the engine!

 

Not true with modern car.

 

I read from my car manual that it will take 4s from cold start for oil engine oil to lubricate all the essential parts in the engine.

 

So do away with warm up practice, u will save money and the earth by using less fuel & less CO2 polution.

[LoverofCar]

My habit is to start and drive off but at a low rpm and speed for the first few hundred meter..just to let the oil fully lub all the engine part...

[Solar]

check your car manual..

 

mine states:

'...The fuel injection system automatically lowers the idle speed as the engine warms up.

While the engine is warming up, make sure that the selector lever is at the 'P' or 'N' position and that the parking brake is applied'

 

engine speed is at about 1900rpm while warming up.. then lowers itself to about 1200rpm when done... which is only about a couple of minutes

 

 

[Kiadaw]

I hardly warm up my cars, except in very cold weather condition.

[Nightkids]

When cold start, the rpm go to around 1200k, wait a couple of minutes for engine and turbo charger to warm up, rpm drops to less than 1k and move off gradually out of carpark...... feel that the car more smooth instead of moving off without warming up......

Edited June 19, 2011 by Nightkids

[Pisces69]

Old car yes, modern cars no. But I disagree that all fuel injected cars don't need warming up. I got a 23yr old fuel injected engine that does need warming up, can still be driven but it'll be boggy until engine warms up. Even M engine will not be able to redline till warmed up.

 

 

Wah 23 years olf FI engine? What car is that?

[Pisces69]

When cold start, the rpm go to around 1200k, wait a couple of minutes for engine and turbo charger to warm up, rpm drops to less than 1k and move off gradually out of carpark...... feel that the car more smooth instead of moving off without warming up......

 

Mine when start at cold wil b abt 900rpm n when it warms in about 5 mins wil b 700rpm.

 

I just start and drive in about 10 secs. But I drive slow (<2Krpm) fr a few mins till the temp needle starts to move up. I only rev >3K rpm once the temp needle had reached its normal operating temp in about 10mins.

 

[SimonTan]

But many sports car owners just start, blow and sprint off...definitely reaching redline on cold engine.

 

[Pisces69]

But many sports car owners just start, blow and sprint off...definitely reaching redline on cold engine.

 

Hahaha. Let them lah. Its their car so ty can just do what ty want.

 

[Nightkids]

Hahaha. Let them lah. Its their car so ty can just do what ty want.

 

 

yeah...... even rosak they also bochap....... they got plenty of $$$$$

[Nzy]

I think modern cars can do that. Have been doing that for the past 10 years with my corona. Don't need to wait till warm up. No problems with the engine after 10 years also.

[Fennmax]

is it winter already? come on, at 32degree c. its pretty warm. start up. w i a while. pretty warm liao. drive slowly as the temp gauge rises and then can wot!

[Kiadaw]

But many sports car owners just start, blow and sprint off...definitely reaching redline on cold engine.

Some sports car prevent you from revving over certain RPM if the oil temperature did not reach a preset value.

[Tanhangkiang]

Sport car generally are high revving, components are more tightly specified.

 

When engine not homogeneous in temperature, due to expansion not being exactly even, some parts are more tight than others.

 

Therefore, they need to be roughly homogeneous in temp to work in optimal conditions, such as reduce vibration and reduce wear.

[Mona-vie]

Not true with modern car.

 

I read from my car manual that it will take 4s from cold start for oil engine oil to lubricate all the essential parts in the engine.

 

So do away with warm up practice, u will save money and the earth by using less fuel & less CO2 polution.

 

Its not about lubrication.

 

Its about expansion of metal. When engine is cold, the gap between you piston rings/pistons and cylinder wall + bearings etc is bigger. Hence if you redline your engine while its cold, it will cause the parts to vibrate more than usual. This vibration can cause scuffing etc.

 

FI engines is more sensitive to warmup compared to NA because it uses larger tolerances for its pistons (due to expansion). Turbo also needs to warm up.