Re: 2.0 vs 1.8 16V head on a 9A Block.

[Dan Bubb <jdbubb@ix.netcom.com>]

There was an article in European car probably about 10 years ago on the
16V heads. Specifically, about TT's Street Port 16V head. It had flow
graphs, intake and exhaust for the 1.8, 2.0 and ported heads.
The stock 1.8 intake flows better than the 2.0.
The stock 2.0 exhaust flows better than the 1.8.
Ported is a big improvement over the best of each and either head can be
ported for the same end result.
I still have the article. If anyone's interested I can look up the
specific numbers or maybe even scan it. I also recall seeing flow graphs
in TT's old "Amazing dyno stories" that I also still have. Some things
you just don't throw away.
Dan

Riley McDowall wrote:
> 
> At 5:47 PM -0400 8/7/01, 16V Jason wrote:
> >Now, the question is:  Does anyone have any empirical data to back
> >any of this up?  Like before-and-after dyno runs?  Or -- does anyone
> >have a healthy 2.0 dyno run that we can compare to someone else's
> >2.0-with-a-1.8-head dyno run?
> 
> Hi 16v Jason, you sound like a newbie, so welcome to the list ;)
> 
> Bottom line here is that VW Vortex has the members who have the
> answers.  Seems like everything we see here, when it comes to
> performance mods at least, has already been discussed over there at
> length.  This topic has consumed a lot of bandwidth in the  last year
> or so, and although I could be wrong, I don't think anyone has ever
> done back-to-back dyno runs controlling every variable but this one.
> I believe someone has run 1/4 mile times with the 2 heads in the same
> car, but that isn't necessarily conclusive.  I also seem to recall
> someone in Quebec putting the 2 heads on a flowbench and finding the
> 1.8 to flow better overall (in other words, peak).
> 
> Nonetheless, it's now part of Volkswagen lore that if you've got to
> pick a head for your 2L block, and you aren't planning on porting it
> down the road, the 1.8 is the one to pick.  I've yet to see anyone
> argue successfully against this wisdom....
> --
> 
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