Redline
04-21-2008, 10:29 PM
#12
2nd Gear Member
Join Date: Nov 2006
Location: Bergen County, New Jersey
Posts: 477
RE: Redline
Another way to look at it.
A lot of people forget to put into perspective how fast these engines are actually turning.
When at 6000rpm, which some people don't think is very high, you are spinning your engine 100times every SECOND. That means every .01 of a second, your car crankshaft has rotated. A blink of the eye takes on average .3 to .4 of a second. So, at 6000rpm in a blink of the eye your crank has turned 30 times.
On a 2v, you have 16 valves that can start floating. Every valve has a chance to cause PTV contact on a rotation twice... so if you have 1 valve floating, you have 200 chances of PTV in a SECOND.
Sometimes it truly amazes me that engines don't have this kind of stuff happen more often. Just goes to show the kind of ingenuity designing an engine takes to prevent this, and the strength of human engineering to create alloys that can handle this.
A lot of people forget to put into perspective how fast these engines are actually turning.
When at 6000rpm, which some people don't think is very high, you are spinning your engine 100times every SECOND. That means every .01 of a second, your car crankshaft has rotated. A blink of the eye takes on average .3 to .4 of a second. So, at 6000rpm in a blink of the eye your crank has turned 30 times.
On a 2v, you have 16 valves that can start floating. Every valve has a chance to cause PTV contact on a rotation twice... so if you have 1 valve floating, you have 200 chances of PTV in a SECOND.
Sometimes it truly amazes me that engines don't have this kind of stuff happen more often. Just goes to show the kind of ingenuity designing an engine takes to prevent this, and the strength of human engineering to create alloys that can handle this.
04-22-2008, 01:17 AM
#14
3rd Gear Member
Join Date: Apr 2007
Location: Delaware
Posts: 677
RE: Redline
Zanador that's some great info, and actually that 1-2-3-2 happened to me once. I hit about 6800 in my GT a couple months before I traded it in and I was literally riding all the way home that night terrified of hearing a tap.
Scary.[:'(]
Scary.[:'(]
04-22-2008, 08:50 AM
#16
4th Gear Member
Join Date: Apr 2008
Location: Birmingham, Alabama
Posts: 1,296
RE: Redline
ORIGINAL: Zanador
Another way to look at it.
A lot of people forget to put into perspective how fast these engines are actually turning.
When at 6000rpm, which some people don't think is very high, you are spinning your engine 100times every SECOND. That means every .01 of a second, your car crankshaft has rotated. A blink of the eye takes on average .3 to .4 of a second. So, at 6000rpm in a blink of the eye your crank has turned 30 times.
On a 2v, you have 16 valves that can start floating. Every valve has a chance to cause PTV contact on a rotation twice... so if you have 1 valve floating, you have 200 chances of PTV in a SECOND.
Sometimes it truly amazes me that engines don't have this kind of stuff happen more often. Just goes to show the kind of ingenuity designing an engine takes to prevent this, and the strength of human engineering to create alloys that can handle this.
Another way to look at it.
A lot of people forget to put into perspective how fast these engines are actually turning.
When at 6000rpm, which some people don't think is very high, you are spinning your engine 100times every SECOND. That means every .01 of a second, your car crankshaft has rotated. A blink of the eye takes on average .3 to .4 of a second. So, at 6000rpm in a blink of the eye your crank has turned 30 times.
On a 2v, you have 16 valves that can start floating. Every valve has a chance to cause PTV contact on a rotation twice... so if you have 1 valve floating, you have 200 chances of PTV in a SECOND.
Sometimes it truly amazes me that engines don't have this kind of stuff happen more often. Just goes to show the kind of ingenuity designing an engine takes to prevent this, and the strength of human engineering to create alloys that can handle this.
Sticky!!
Ive done the ole 1-2-3-2.... Not very fun.
04-22-2008, 11:35 AM
#17
5th Gear Member
Join Date: Aug 2007
Location:
Posts: 3,189
RE: Redline
thats some great math. not gonna ask how you came up with all that but wow. i never broke it down that far but just goes to show you the amount of stress on the motor when its in high rpm. breka that down to 15k redline on a bike and your spinning the crank every what: .002 seconds?
and eazy i'm hopefully getting my r6 next week :-). decided the stang wont ever be fast enuff for me so im not gonna pour any more money into it to be mediocre fast.
and eazy i'm hopefully getting my r6 next week :-). decided the stang wont ever be fast enuff for me so im not gonna pour any more money into it to be mediocre fast.
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