[DeTomaso] [Fwd: Re: automotive related questions!]

[asajay at asajay.com]

Watch the video:
http://auto.howstuffworks.com/engine1.htm

Asa Jay

Quoting Dave Londry <davel at emspace.com>:

> 720/8 = 180 ??
>
> asajay at asajay.com wrote:
>> It takes two revolutions to complete four strokes for all eight
>> cylinders, yes.  Each cylinder must make four strokes:  Intake (piston
>> goes down), compression (piston goes up), ignition (piston goes down),
>> exhaust (piston goes up).  So you see, exhaust only happens every
>> -other- time the piston comes up, so the crank has to make two
>> revolutions to complete one cycle.
>>
>> :)
>>
>> Asa Jay
>>
>> Quoting Dave Londry <davel at emspace.com>:
>>
>>
>>> 8 cyl every 2 revs or 720 degrees??
>>> dave
>>>
>>> Paul - Home wrote:
>>>
>>>> I have a few guesses and they are only guesses because the standard
>>>> Chevy firing order also supports crossing the banks to get 180 degree
>>>> headers.
>>>>
>>>> 1. It didn't fit well in the body work
>>>> 2. They just didn't care to optimize that closely
>>>> 3. They were running a flat crank which doesn't need to cross banks.
>>>>
>>>> For reference they are called 180 degree headers because each exhaust
>>>> pipe will output once every 180 degrees of crank rotation.
>>>>
>>>> Paul
>>>> #9270
>>>>
>>>> michael frazier wrote:
>>>>
>>>>
>>>>> Thanks for the info.  Any response on the 2nd question?
>>>>>
>>>>> Michael...it was in the 30s last night and the 50s today.  Looking
>>>>>  for a winter project since it's too cold to go outside.
>>>>>
>>>>> (2nd question: After looking at photos of GT-40s, Lolas, McLarens,
>>>>>  Chapparals, etc, I noticed the Ford poweredvehicles used 180s
>>>>> while the Chevy powered ones did not (generally). Any thoughts
>>>>> about that? Boat type headers?
>>>>> I asked about building a set of Pantera headers like that awhile
>>>>> back. You could run longer tubes, a crossover pipe,
>>>>> less connectors and simpler build while still getting the zoomy
>>>>> racy look for those who go just for that. Any thoughts on that one?)
>>>>> _________________________________________________________________
>>>>> Send e-mail anywhere. No map, no compass.
>
>
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