Common sense engine upgrades

[jdbubb@ix.netcom.com (Dan Bubb)]

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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