16v or 8v turbo?

[amalventano1@comcast.net (Allyn)]

kinda, the 16v makes more power than the 8v (no boost), so it takes a slightly longer time for the
8v to reach the same power output as the 16v (both starting at no boost). this can me somewhat
compensated for by proper turbo selection, but in the end, the cost of getting the higher boost is a
bit more time for turbo lag.
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: "Jan Folkson" <jfolkson@optonline.net>
To: "Allyn" <amalventano1@comcast.net>; "Larry" <rocco16v@netzero.com>; "Lil B 959"
<lilb959@hotmail.com>; "scirocco list" <scirocco-l@scirocco.org>
Sent: Saturday, June 22, 2002 12:38 PM
Subject: Re: 16v or 8v turbo?


> > okok, heres what i mean.
> >   by running lower c/r, you can run higher boost, meaning the engine draws in
> > more (mass) of air
> > on each stroke. the lower c/r means lower multiplication of the absolute
> > pressure coming in, so
> > since the lower c/r engine is multiplying by a lower factor, there is a lower
> > peak cylinder pressure
> > in the lower c/r engine (with the same level of boost). the peak cylinder
> > pressure is usually the
> > limiting factor.
> >   a (stock) 16v with ~5 lbs boost has approx the same peak pressure as an 8v
> > with ~15 lbs boost.
> > this is where the ~5 lbs limit comes from for stock 16v turbos. yes the 16v
> > may be flowing better,
> > but the 8v is still getting much more mass of air (and fuel) in the cylinder
> > per stroke (due to the
> > much higher intake pressure).
>
> Doesn't lowering the c/r make for more of a lag before the turbo kicks in
> though.
>
>
> - Jan Folkson  http://www.janfolkson.com
> NYC
>
> '86 16V
> '99 Passat GLS 1.8t
> '00 Beetle GLX 1.8t
>
> "Gravity, it's not just a good idea...it's the law!"
>