running hard while cold.......

[camaroincal]

Ok....Is running your car hard before its fully warmed up really that bad for it?...And I'm not talking about redlining it at every chance...but getting the rpm's up to around the 4-5 thousand range...My car seems to like to run harder right after it starts...so its hard to not resist the urge to "punch it" a little..guess I'm impatient..anyways..so if it is bad..what exactly happens in the engine that is bad? Thanks...

[sac2165]

I don't know exactly how bad, but the way I see it, your oil's going to be more viscous when its cold, and may not lube your internals as well.

I generally run pretty easy til my temp gauge gets up a little.

[lord_gufi]

things dont get lubed correctly the metals arent expanded as they should be warm, 140 is soposedly the perfect temp to run your car ~shrug~ dead cold dont do it wait like 3 minits or 5~shrug

[Dominic]

<blockquote>quote:</font><hr>Originally posted by camaroincal:
Ok....Is running your car hard before its fully warmed up really that bad for it?...And I'm not talking about redlining it at every chance...but getting the rpm's up to around the 4-5 thousand range...My car seems to like to run harder right after it starts...so its hard to not resist the urge to "punch it" a little..guess I'm impatient..anyways..so if it is bad..what exactly happens in the engine that is bad? Thanks...<hr></blockquote>


Is it bad? Yes. Please do not do this.

[Bliggida]

<blockquote>quote:</font><hr>Originally posted by lord_gufi:
things dont get lubed correctly the metals arent expanded as they should be warm, 140 is soposedly the perfect temp to run your car ~shrug~ dead cold dont do it wait like 3 minits or 5~shrug<hr></blockquote>Good info, but 160 is actually the magical number. Your constant operating temperature should never be below 160. 180 is where you start making power. And according to hall of fame engine builder smokey Yunik, there are a few horses up top to be made at 200 degrees. But, that's neither here nor there.

On modern cars, in 70 degree ambient temperature days. I'd let the car warm up for at least 1 full minute.
Get in the car and listen to a song, then go???

If you must drive don't go hard on it, just drive normal, keeping the RPM's low. Racing a cold engine is bad, and there is no exact science but I've heard from other engine builders that cold-racing is good for claiming a couple thousand miles worth of wear everytime you do it - for what that's worth.

[Takumi Fujiwara]

just drive it softly, 3k- rpm max before its warm. THe main idea is that your engine block is still making hot explosions and though the whole engine isnt hot there are some still very hot components - this is where the problem lies. its in the fact that, when u rev it high coolant needs to disipate heat in thoughs areas, but unless u ahve 105º thermo, u wont get it in the places u need it because the thermo is cold and not open. So ur car is being poorly lubed and isnt getting coolant, - I usually try to stay under 3krpm all the time but while warmin it up if im not gonna let it sit for a minute then I drive it under 3-2500 rpm -
:D rool: