how many rotations of crankshaft does it take to fire all cylindersof v8 engine

Only one cylinder fires at a time.
cuhulin

black_13 > writes:

> how many rotations of crankshaft does it take to fire all cylinders of
> v8 engine
> black_13

The number of cylinders is irrelevant. A four stroke engine fires all
cylinders in two revs, a two stroke engine in a single rev, no matter
how many cylinders it has.

LOL, *FINALLY* the simplest and most accurate answer!

Thomas Tornblom wrote:
> black_13 > writes:
>
>> how many rotations of crankshaft does it take to fire all cylinders of
>> v8 engine
>> black_13
>
> The number of cylinders is irrelevant. A four stroke engine fires all
> cylinders in two revs, a two stroke engine in a single rev, no matter
> how many cylinders it has.

"Steve W." > wrote in :

> Nate Nagel wrote:
>> Steve W. wrote:
>>> black_13 wrote:
>
> Bit of a bummed mood anyway. This past month has been a real BIT%^...
> Lost my 9 year old puppy to kidney failure and internal bleeding, wifes
> Blazer ate it's cat, then the radiator split a tank. Got it all together
> and then one of my friends over in the sandbox was hit and killed.
>
> Then just to make it interesting I get the flu, and this is after I got
> both flu shots!!!!
>
> I will be real happy when December gets here....
>
Ouch. It never rains as they say . Here's to a very happy Christmas for
you and yours.

wrote in news:1573-4B133D19-6369@storefull-
3173.bay.webtv.net:

> Only one cylinder fires at a time.
> cuhulin
>
>


True, but all eight are connected to the same crankshaft.

This means that once the crankshaft goes through two complete revolutions,
all eight cylinders have performed one complete cycle of
suck/squeeze/bang/blow, even if the sequence didn't start with "suck".

--
Tegger

"black_13" > wrote in message
...
> how many rotations of crankshaft does it take to fire all cylinders
> of
> v8 engine
> black_13

Depends on what you mean. Assuming you start counting when the a
particular cyclinder fires, it will be 630 degrees before the other 7
have fired as well. In general, I think you would say two complete
revolutions are need to insure that you ahve fired all eight
cylinders.

0 degrees - first cylinder fires
90 degrees - second cylinder fires
180 degrees - third cylinder fires
270 degrees - fourth cylinder fires
360 degrees - fifth cylinder fires (1 complete revolution)
450 degrees - sixth cylinder fires
540 degrees - seventh cylinder fires
630 degrees - eight cylinder fires
720 degrees - first cylinder is going to fire again..... (2 complete
revolutions)

Ed

"C. E. White" > wrote in message
...
>
> "black_13" > wrote in message
> ...
>> how many rotations of crankshaft does it take to fire all cylinders of
>> v8 engine
>> black_13
>
> Depends on what you mean. Assuming you start counting when the a
> particular cyclinder fires, it will be 630 degrees before the other 7 have
> fired as well. In general, I think you would say two complete revolutions
> are need to insure that you ahve fired all eight cylinders.

You are speaking only for a 4 stroke cycle engine. On a 2 stroke cycle
engine, each piston fires on every revolution.

The best and most accurate and most concise response remains --

"The number of cylinders is irrelevant. A four stroke engine fires all
cylinders in two revs, a two stroke engine in a single rev, no matter
how many cylinders it has."

from "Thomas Tornblom"

hls wrote:
>
> "C. E. White" > wrote in message
> ...
>>
>> "black_13" > wrote in message
>> ...
>>> how many rotations of crankshaft does it take to fire all cylinders of
>>> v8 engine
>>> black_13
>>
>> Depends on what you mean. Assuming you start counting when the a
>> particular cyclinder fires, it will be 630 degrees before the other 7
>> have fired as well. In general, I think you would say two complete
>> revolutions are need to insure that you ahve fired all eight cylinders.
>
> You are speaking only for a 4 stroke cycle engine. On a 2 stroke cycle
> engine, each piston fires on every revolution.

"Killer Kowalski" > wrote in message
net...
> The best and most accurate and most concise response remains --
>
> "The number of cylinders is irrelevant. A four stroke engine fires
> all
> cylinders in two revs, a two stroke engine in a single rev, no
> matter
> how many cylinders it has."
>
> from "Thomas Tornblom"

How about a Wankel? They are four stroke.....

Ed

"C. E. White" > wrote in message
...
>
> "Killer Kowalski" > wrote in message
> net...
>> The best and most accurate and most concise response remains --
>>
>> "The number of cylinders is irrelevant. A four stroke engine fires all
>> cylinders in two revs, a two stroke engine in a single rev, no matter
>> how many cylinders it has."
>>
>> from "Thomas Tornblom"
>
> How about a Wankel? They are four stroke.....

Yea, I guess that's technically true, depending on the definition of
"stroke". Here's a great animation from HowStuffWorks.
Make sure to click on the "cycle breakdown" button in the upper right to
clearly see each "stroke".

http://auto.howstuffworks.com/rotary-engine4.htm