180 degree headers WAS:Re: Turbo header design

[Greg Hermann]

><snipperoo>
>
>>Clarence,
>>  This is easily done with an inline four having a 1-3-4-2 firing order,
>>as you just pair cyl's 1-4 and 2-3 together.  Commonly done in NA
>>headers and OEM manifolds too.  However, true 180 degree headers on a V8
>>typically take up a lot of space.
>>   The only firing order i am familiar with is for a GM engine, which is
>>1-8-4-3-6-5-7-2.  Picture the cyliders as two rows (which they are):
>>
>>     1     2        you can see that #1's 180 degree partner is #6, #8's
>>     3     4        is #5, #4's is #7 and #3's is #2.
>>     5     6
>>     7     8
>
>#1 and #6 are 180 degrees apart on the distributor, not the crank. #1 and #4
>are 180 degrees apart on the crank. Aren't they? What cylinders are grouped
>together with NASCAR 180 degree headers?
>
>Jon
>
><snip>
 I think he meant 360 degrees--- :-)

Greg