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Re: Where to buy performance parts?
That's good to know. Thanks. I'll have to figure out something else that's
wrong then : ) The O2 sensor missing wouldn't make it run badly, just less
efficiently, right?
-Josiah
'84 GTi
http://bork.hampshire.edu/josiah
On Wed, 12 Jul 2000, drew wrote:
>
> There should not need to be ANY changes to the stock CIS or K-LAMBDA Cis
> to make a G-grind work. The profile of the cam is such that it
> provides increased power at all rpm's, but it also increases emissions
> (which is why we didn't see it in North American cars.)
>
> With CIS, moving more air past the airflow sensor plate results in more
> fuel to the injectors. A fully functioning stock fuel system will not
> require modifications for a G grind to perform, although a free flowing
> exhaust will definitely help. Note that I'm not sure what the issues are
> with a catalyst + G grind, although I did run this combo on my 84 GLI
> years ago, I did not have to go through any tailpipe emissions.
>
> Drew (84 Wolfsburg)
>
> On Wed, 12 Jul 2000, Wm. Josiah Erikson wrote:
>
> > Could this be why my Rabbit is currently running like crap? It had a stock
> > cam in it, and the head I got to replace it happened to have a G-grind in
> > it, and now it runs like crap. I've tried screwing with the timing, the
> > %CO adjustment on the fuel distributor (is there a better way to adjust
> > fuel mixture?), and I've checked the valve timing about 8 million times -
> > it's right. Do I need to do something to make it run right with a higher
> > lift cam?
> > -Josiah
> >
> > '84 GTi
> > http://bork.hampshire.edu/josiah
> >
> > On Sat, 8 Jul 2000, Stephygee wrote:
> >
> > > Take your pick (Neuspeed, Techtonics, Autotech), but most folks go with
> > > Techtonics. Just putting a cam in your engine without beefing up other
> > > areas of your engine won't produce any noticeable results. Installing a
> > > fuel enrichment device (cam increases breathing, so you better have fuel to
> > > match it) is the next step, and of course, you might want to get a free
> > > flowing exhaust.
> > >
> > > The Spring 2000 issue of VW Power covers cam installs (albeit 16v Kent cam
> > > install), and explains the necessity of the fuel enrichment module. Excerpt
> > > follows:
> > >
> > > ' If You've Got Air, You Still Need Fuel!
> > >
> > > The Techtonics 16v Fuel Enrichment was important: Sufficient fuel is a
> > > must when moving to a hotter cam. With the Euro intake cam, the added fuel
> > > from the Techtonics unit is good for almost 12hp at the crank. With the
> > > Kent Cam's added breathing it was necessary to have the fuel injection
> > > working with the Techtonics Fuel Enrichment. Just as important, it's a
> > > simple device that contains no complex electronics to fail and possibly
> > > damage the expensive engine management unit.
> > > I did a dyno run without the fuel enrichment installed; it was about the
> > > same on the bottom end until 3000 rpm, then it went flat. Without the 16v
> > > Fuel Enrichment, the Kent 258 degree cams barely put out the power of the
> > > Euro-intake cam with the Fuel Enrichment. That's an important lesson for
> > > owners of 16v cars with CIS-e fuel injection. No need to improve the
> > > breathing unless you've got the fuel to match--it's that simple.'
> > >
> > > Good luck.
> > >
> > > Steph
> >
> >
> > --
> > Email problems to: scirocco-l-probs@scirocco.org To unsubscibe send
> > "unsubscribe scirocco-l" in the message to majordomo@scirocco.org
> >
>
> Drew MacPherson, Network Analyst, University of Guelph
>
> drew@dyermaker.cs.uoguelph.ca | visit the Massey-Harris page:
> http://dyermaker.cs.uoguelph.ca/~drew | http://m-h.cs.uoguelph.ca
>
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