Common sense engine upgrades

[rabbit16v@prodigy.net (Dave Ewing)]

What's a Megasquirt?

Dave

> Yeah! But, they're pistons from an 8V engine made for turbocharging that
are
> going into an 8V engine. This makes sense. You only have to work on
getting
> your piston to deck height right and I'm betting that won't even be an
issue
> with the parts you have.
> As far as Megasquirt, I wouldn't say you were "adapting" your fuel system.
> I'd say you're changing it for a completely different one.
> I also have a Megasquirt on order. Wonder how they're going to work?
> Dan
>
> ----- Original Message -----
> From: Wing Gee <winggee@hotmail.com>
> To: Dan Bubb <jdbubb@ix.netcom.com>
> Sent: Saturday, January 12, 2002 2:19 PM
> Subject: Re: Common sense engine upgrades
>
>
> > :-) i'm gonna use turbo audi 5k pistons and rods with a 1.7L crank.
> > compressions comes down to about 7.8. but i'm putting a turbo and
adapting
> > this and that fuel system (megasquirt).. hehe..
> >
> > but why make it so complicated? "keep it simple stupid"
> >
> > Wing
> >
> >
> > ----- Original Message -----
> > From: "Dan Bubb" <jdbubb@ix.netcom.com>
> > To: "Dave Ewing" <rabbit16v@prodigy.net>; "Scirocco List"
> > <scirocco-l@scirocco.org>
> > Sent: Saturday, January 12, 2002 10:23 AM
> > Subject: Common sense engine upgrades
> >
> >
> > > 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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