Re: 200hp goal pt2

[Jim Buck <vwpride@mixi.net>]

Some good comments, Brad.

Jim

Brad Sheridan wrote:
> 
> Jason wrote:
> 
> >       Whoa, Scottie!  Let's try that one in English!
> 
> >       If I'm not mistaken, the intake runners are a direct line of fuel into
> > the injectors, right?  Does this system completely bypass the existing
> > fuel injection system, or what?  Oh yeah, and there's that "Extrude
> > Hone" polish business again.  I recall Meze talking about that too...I
> > thought that that was a process for the exhaust?  Arrrrgh.  I thought
> > that I was starting to get the hang of this stuff...
> 
>  The intake runnners are the 4 big metal things that rest on top of the
> engine. The intake air goes through them:)
> 
>   The Euro intake has 50mm diameter runners, which have a bit larger diameter
> than the standard US ones. This translates to more power up top(due to a higher
> flow capacity), at the expense of a little power down low( bigger cross
> section means lower intake air velocities).
>   Note the 50mm euro intake for the scirocco is now much more expensive than
> the intake for the GTI and GLI 16V. Its close to $1000, way more than its
> worth, IMHO.
> 
>   Extrude Honing is a process of forcing a viscous liquid through the air
> path. Suspended in this liquid is an abrasive material that eats away at the
> metal that is blocking the flow. This results in a porting that should
> closely match the flow path of the air, resulting in a porting job that can
> be much smoother and more precise than what would be done by hand. Never had
> it done, but I've only read good things.
> 
> >       Haltech injection system.  I recall hearing that name being bantied
> > about as well.  Isn't that a programmable injection system?  I s'pose
> > that one would use the injection system in conjunction with the runners,
> > no?
> 
>    It is a programmable FI system. But if you're gonna do a Haltech system,
> why go with MSD? Use the programmable FI system to trigger the sparks, that
> way you can fully map out the ignition as well. Last I saw of MSD, it wasn't
> mappable. Electromotive makes very good system as well.
> 
> >       If one were to go with the intake runners, would the fuel enrichment
> > module still be needed, or even be compatible?
> 
>  Completely.
> 
> >       And would I want to big up the injection system before everything
> > else?  If my existing system is sufficient until 170hp, I'd imagine I'd
> > be safe for awhile yet.  Thanks for the answers and for giving me 7 new
> > questions in 4 small paragraphs :)
> 
>   Buying the fuel enrichment module would allow you to compensate at each
> level, as the Autotech unit, as well as the adjustable version of the
> Techtonics unit, allow you to vary the settings based on your level of
> modification. If you're not very familiar with engines, I would recomend
> this over a programmable FI system. Plus its much cheaper at $200 vs $2000 for
> EFI once you start adding in the cost of additional sensors, fab work, etc.
> It'd be even more if you have to get some else to do all the work.
> And the additional gains of a fully programmable FI system are not going to
> be that impressive, unless you do alot more to your engine than what you've
> mentioned so far.
> 
>   My opinion, do the 2.0 liter and enrichment device first, as I think these
> will give you the biggest bang for the buck. If you have the extra money, do
> the headwork(cams, port/polish) and extrude hone your intake, but this'll
> really add up $$$ quick.
> 
> Brad
> 
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-- 
Jim Buck,
ES #99
1997 Points Champion,
E-Stock Champion,
Fort Wayne Region, SCCA
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