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Re: Header ???



On Mon, 02 Jun 1997 12:12:11 -0700 Jason Brunberg <stoopid@idirect.com> wrote:

> Vince wrote:
> > 
> > what's supposed to be the best ?
> >         4-into-1 header   (ansa)
> > or     4-into-2-into-1 "tri-y"  (autotech)
> > 
> > This is for my 1.7 L scirocco 82 !
> 
> 	From what I have heard, the exhaust gases flow more smoothly with the
> tri-y header.  Seems to make sense, as the exit would be more gradual
> for the exhaust.  
> 
> jason 
> 87 16V

Actually, the 4-1 headers flow better but cause more power up top instead of on the 
low end.  This is because they are aranged to let the air out of each pipe and into 
the rest of the exhaust system in the firing order.  So with each exit of air from the 
head it goes into the 4 -1 collector and then to the cat and out the muffler.  This way 
there are fewer mergings of air which will equal restriction.  This is how good ones 
are designed though I am not too sure the Ansa would be the best choice.  I would 
go with Autotech's 3-2-1 header for the street simply because everyone else 
recomends it =)  I have yet to try it but Jay and Keith are both getting one this week 
so we'll all have some personal experience to share with ya!
 
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Josh Clark
Visit EXC's Performance Website at:
http://idt.net/~exc
(201) 726 0507

-We specialize in specialty European parts and 
-wheels for VW's 

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