Common sense engine upgrades

[rabbit16v@prodigy.net (Dave Ewing)]

Still would work!  Man, I'd hate to have you actually "pick" on me!!  The
diesel thing was a jab to see what kind a feedback I'd get but the 16v head
on a smaller cc block is a very nice high reving motor, however you decide
to do it.

Dave

> We have got to stop this "use diesel pistons with a 16V head"..."use 8V
> pistons with a 16V head"..."use 16V pistons with an 8V head" bullshit! 90%
> of the time this is a non-starter anyway because of piston pin height in
the
> piston, BUT....
> Combustion chambers are designed to provide the required CR, squish area,
> valve area, minimal valve shrouding, turbulence for efficient burn rate,
> minimal surface area for thermal efficiency and minimal
emissions.....blah,
> blah,blah.....
> The top of the piston is the bottom of the combustion chamber and there
are
> many more issues than CR to have an effective combustion chamber!
> You can do a mix and match if you have enough sense to avoid piston to
valve
> collisions and piston to head collisions, but it isn't going to be even
> close to optimum!
> What the hell is the point of putting a turbo on an engine, adapting the
> fuel and ignitions systems to support this, then bastardizing the whole
> effing thing with a combustion chamber that has a CR that is too high or
too
> low because you used some POS pistons that you had laying around that have
> poor turbulence and burn rate because the squish area is lost, long burn
> rates because the combustion chamber is the whole diameter of the piston
> instead of being centrallized, that is all MORE prone to knock than if you
> had just bothered to get a piston with the right CR that was made for the
> application.
> Being cheap is one thing. Being stupid is another.
>
> I'm thinking that  pistons from a Honda B18A would be the ticket for my
high
> reving 8V!!
> Dan
> Not picking on you Dave! Just the perverbial straw......
>
> ----- Original Message -----
> From: Dave Ewing <rabbit16v@prodigy.net>
> To: Scirocco List <scirocco-l@scirocco.org>
> Sent: Friday, January 11, 2002 10:34 PM
> Subject: Re: 16v head on a 1.7L engine
>
>
> > This would work OK and I have actually been thinking about a 1.6L 16v
race
> > motor but you would have to do two things.  First, you would have to do
> what
> > Scott explains below (welding the oil return hole then surfacing the
> head),
> > then you would either have to use deisel pistons to up the compression
or
> it
> > would be a great base for a turbo!!  HTH!!
> >
> > Dave
> >
> > > Nope, no you wouldn't. :^) In order to fit the 16v head to the earlier
> > > block, you have to weld shut some of the oil return holes in the head.
> > Thus,
> > > it is a one way trip. Just drop the 2.0l 8v motor in there with a big
> > valve
> > > head and call it a day.
> > > --
> > > Scott F. Williams
> > > NJ Scirocco nut
> > > Golf GTI 16v rollycar
> > > Mazda 323 GTX turbo assaulted vehicle
> > > '99 Subaru Impreza 2.5 RS (coming soon)
> > > ClubVAC: "Roads found. Drivers wanted."
> > >
> > > Check out our rally team's website!
> > > http://www.usrallyteam.com
> > >
> > >
> > >
> > > _______________________________________________
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> >
> >
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