16v or 8v turbo?

[Larry" <rocco16v@netzero.com (Larry)]

Allyn-
  The way you've worded your reply, it sounds like you are contradicting
yourself:
Less c/r ( less pressure) so you can run more boost which equals more
pressure??
Please expound on your position...
( BTW, you say less c/r lets the engine draw in more air, some listers say
MORE c/r lets the engine draw in more air.  I say 'don't make no
difference'.  Picture this: take a single cylinder engine of 100cc
displacement. On the intake stroke, that engine will theoretically draw in
100cc of intake charge. Doesn't matter how much it compresses that charge on
the next stroke, 2:1 or 10:1, it will only draw in 100cc. Because the
compression stroke occures AFTER the intake, compression is dependant on
intake, intake is NOT dependant on compression.  To say otherwise would be
like saying the position of the throttle pedal is dependant on the engine
output, when it's the other way around.  Follow?)

 Bryson-
  Regardless, the only way to make more power is to move more air/fuel
through an engine. Period.
A 16v engine will move more air/fuel (all else being equal) than an 8v,
because it has more valve area.
Therefore, the 16v has more POTENTIAL than the 8v. In all practicality, for
street use the 8v would probably be the best choice when you factor in 'bang
for the buck'.

Larry

----- Original Message -----
From: Allyn <amalventano1@comcast.net>
To: Lil B 959 <lilb959@hotmail.com>; <scirocco-l@scirocco.org>
Sent: Friday, June 21, 2002 7:01 PM
Subject: Re: 16v or 8v turbo?


> ok, heres the deal. the more air you can get in there, the better (read:
more torque/hp). lower c/r
> means more air (mass) can come in (i.e. more boost). the reason that more
can come in is that the
> lower c/r engine wont try to compress it as much, so you are keeping
in-cylinder peak temps within
> reasonable numbers. this lets you have more boost without doing crazy
stuff like water
> injection/massive intercoolers/race gas.
> ...so that leaves the best bet being the 8v. the 16v is actually better
suited to the task (and
> breathes alot better), but to use it you have to drop the c/r (either by
spacing the head or forged
> pistons).
>
> p.s. dont forget the big injectors :)
>
> Al
>
> Allyn Malventano, ETC(SS), USN
> 87 Rieger GTO Scirocco 16v (daily driver, 180k, rocco #6)
> 86 Kamei Twin 16V Turbo Scirocco GTX ('it has begun', rocco #7)
> 86.5 Occo 16v Trailer (dotting 'i's across the country, rocco #8)
> 87 Jetta 8v Wolfsburg 2dr (daily driver, 260k, 0 rattles, original clutch,
driveshafts, wheels :)
>
> ----- Original Message -----
> From: "Lil B 959" <lilb959@hotmail.com>
> To: <scirocco-l@scirocco.org>
> Sent: Friday, June 21, 2002 8:30 PM
> Subject: 16v or 8v turbo?
>
>
> >
> >
> > Hey I was wondering if I should go for a 16v or 8v turbo?  I know the 8v
has
> > a better compression ratio for a turbo, but if I ran less boost with the
16v
> > would it be better than running more boost with the 8v?  Any information
> > would be helpful.  Thanks,
> > Bryson
> >
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