Re: Anyone have a 2117cc 16V

["Allyn" <amalventano1@home.com>]

Randy,
Piston speed is not important, the volume is. If the storke is shorter but
the bore is larger, it all balances out. Actually, getting piston speed DOWN
is the key to high performance engines.
Indy cars have very shallow strokes, but big bores. This enables >10k rev
limits.
Al

Allyn Malventano, ETC(SS), USN
87 Rieger GTO Scirocco 16v (daily driver, 170k, rocco #6) running - for now
87 Jetta 8v Wolfsburg 2dr (daily driver, 260k, 0 rattles, original clutch,
driveshafts, wheels :)

----- Original Message -----
From: "Randy B" <sirocco@telocity.com>
To: "chris jevens" <rocco1987@hotmail.com>
Cc: <scirocco-l@scirocco.org>
Sent: Wednesday, October 31, 2001 8:37 PM
Subject: Re: Anyone have a 2117cc 16V


> Chris,
> Thanks for the info :)
>
> Hmmm.....
> But wouldn't the taller block create slower piston speed and therfore less
> power?
> My basic understanding is that with a smaller angle (piston further from
the
> centerline of crank) the speed of the piston in it's down stroke, at 90*,
> and it's upstroke, at 270* would be slower, pulling in less air (or
pulling
> it in at a slower velocity). There would also be less compression because
> less air is being compressed.
> Am I even remotely correct in these assumptions???????
>
> The taller block would be smoother (probably why VW went to the taller
> setup) because of less side-load on the pistons and smaller angles for the
> movement of the 'system' to overcome. Again does this make sense?????
>
> Also, isn't rev-ability mainly a function of airflow and/or port velocity?
>
> Thanks
> Randy (wishing he had paid attention in physics class)
>
>
>
> > Randy I have been curious about the same type motor. I have been talking
> to
> > a couple people from Velocity sport tuning... they have been a lot of
help
> > to me in the past, and I have found them to have a lot of truth to what
> they
> > say. The BS is at a minimum. They recommend the use of a tall block from
> the
> > later 2.0 8v crossflow motors that seemed to have taken place of the 16v
> > 2.0.
> > This would be:
> >
> > -95.5 crank (lightening of course, possible knife edging)
> > -160mm connecting rods (check the EIP website they have chromoly,
> >                         forged, and titanium)
> > -pistons? I havn't gone that far, but for this application I guess they
> >                         would custom... again Velocity has them.
> > As far as the ratio of bore to stroke... I was told by Velocity that
using
> > the other older block(9A) from the later 2.0 16v motors of the early
90's
> > you wouldn't be able to spool all the way up to red line... how true? I
> > havn't had a chance to go any further with it... though they said they
> have
> > done the combination 95.5/160mm rods/Bore?(didn't ask)/tall block from a
> 2.0
> > 8v, and had great success with it working ridiculously well through the
> > whole power band... sounds good to me... $$$ value?? maybe it would be
> > cheaper to go to a turbo?
> >
> > well I hope that helps you in your quest for power/speed...
> > chris jevens
> >
> > >From: "Randy B" <sirocco@telocity.com>
> > >To: <scirocco-l@scirocco.org>
> > >Subject: Anyone have a 2117cc 16V
> > >Date: Wed, 31 Oct 2001 16:45:09 -0800
> > >
> > >Has anyone built, or know someone who has, a 2117cc 16V (or 8V for that
> > >matter).
> > >I would like to find someone who has tried this succesfully or
> unsucesfully
> > >and why.
> > >
> > >JE (other?) 84mm forged pistons, Carillo (other?) forged rods, and
95.5mm
> > >TDI forged crank (knife-edged to lighten) in a 9A block (16V)
> > >
> > >I am considering finding a 90-92 GTI and doing a complete
> > >motor/fuel/motronic swap.
> > >It seems if I can:
> > >A. B. Have the head flowed and ported as needed for the proper port
> > >velocity.
> > >C. Match th correct cams
> > >D. Run ~11.2:1 compression
> > >
> > >I could have a monster of a motor with good streetability.
> > >
> > >What do you all think, need some advice here :)
> > >
> > >Thanks,
> > >Randy
> > >81 Scirocco S "Mars" - needs a bigger motor
> > >81 Scirocco S "Cosmos" - will get the TT 1847cc 8V for daily duties
> > >
> > >
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> >
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