16v 2.0l engine, N/A stats??

[abatzis2@hotmail.com (Michael Abatzis)]

i like this idea. i had actually toyed around with downgrading my 90a alt 
for the same reason, but was unsure if the gains (if any) would be offset by 
poor charging. i don't think the spark should be affected (though i'm not 
sure on this), the coil is already boosting the 14v to a much higher value 
anyway.  remember how those coil-boosters (forget who makes them) actually 
causes a loss of hp in the dyno numbers i've seen. that makes me think that 
this isn't a big problem in a stock system.  scott, i'd be interested in 1) 
how you're planning to do this, and 2) some dyno numbers with and without 
the alt mod (obviously, with that being the only variable changed between 
runs).


-Michael Abatzis
Hotlanta! GA
1988 Scirocco 2L 16v RIP-->parting, finally taking orders: 
www.learnlink.emory.edu/~mabatzi/mikes_page1.html
1987 Scirocco 2L 16v...




>From: "Scott F. Williams" <sfwilliams@comcast.net>
>To: vince@performancecarstereo.com, Kevin S <optimus234@hotmail.com>, 
>scirocco-l@scirocco.org
>Subject: RE: 16v 2.0l engine, N/A stats??
>Date: Sun, 16 Feb 2003 16:29:18 -0500
>
> > So when you jam the throttle, the alternator cuts out freeing 5-10 hp?
>
>Yes, precisely.
>
> > Then since there's no alternator the car's voltage drops from 14.4V to
>12.2V.
>
>That's okay. This would be only the second car that I've ever driven that
>charged at above 12.5V. lol With a deepcycle battery installed, I'll have
>plenty of backup juice to handle brief outtages in the charging system.
>
> > All those fancy new electrical pumps will run much nicer at 14V than at
>12V,
>
>I'm sure that's true. However, I doubt that I'll need the power steering at
>all when I'm at 100% throttle. Considering how short the outtages would be,
>the teeny bit of output lost by the under-powered water pump will not be
>missed.
>
> > ...not to mention your ignition circuit.  Try taking your car for a rip
> > without the alternator plugged in.  It defenately will be slower due to
>less > voltage reaching the coil, transferring into less voltage out of the
>coil,
> > less voltage to the sparkplug, less powerful spark!
>
>I dunno, meng. This idea isn't mine. Rather it came from one of my drag
>racing buddies. I've also discovered that even some stock cars perform this
>function. Furthermore, I've got a TEC-II management system with coil packs.
>As far as I know so long as the ECU operates and the system has 12v or 
>more,
>I'll get a longer-lasting/fatter spark than was ever available from any
>factory system. I surely am no engineer and can't discuss this in any
>specific detail. However, I suspect that any losses that I'll suffer will
>offset much more by the gains.
>
>MMMV <-- that's "my mileage may vary"
>--
>Scott F. Williams
>NJ Scirocco nut
>'99 Subaru Impreza 2.5 RS
>Mazda 323 GTX turbo "assaulted" vehicle
>Golf GTI 16v "rollycar"
>ClubVAC: "Roads found. Drivers wanted."
>
>
>
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