1.8 Vs. 2.0 Revisited AKA why 1.8 instead of a 2.0 head

[drew@scirocco.cs.uoguelph.ca (Drew MacPherson)]

That "torque-adding-donut" was actually a restrictor installed to enhance 
ported manifold vacuum for EGR valve operation and nothing more - sorry to 
disappoint.  They were on 1.6 and 1.7's with EGR, but I've never seen one 
on a 1.8.

They can be removed by pulling the vacuum port out the side of the 
throttlebody with a pair of pliers - then you can knock out the restrictor 
and plug the hole the vacuum port was in.

Drew

On Sat, 18 Jan 2003, T. Reed wrote:

> [snip]
> > already on.  But, to answer your question, no, the 2.0L TBs are not the
> > same.  Some have the same parts but there are a few different type of 2.0L
> > TBs are I don't remember any of them being the same as the 1.8L TBs.  You
> > can make them the same but they don't come that way.  Some resemble the
> > earlier 8v TBs that have a little donut in them to add torque but the donut
> > is permanant, some don't have that.  I think the automatics may be different
> > also.  HTH!
> 
> Torque-adding donut, eh? Time to run down to Krispy Kreme and pick one of
> up for the roc..
> 
> But seriously, I haven't seen one of these before - are you talking about
> some sort of intake restrictor?
> 
> -Toby
> 
> 
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