Is the 1.8 16V really 1800 cc or is it a little less?

[bmcgarvey at gmail.com (Brian McGarvey)]

ok so all he needs to shave is what 30cc's the area in one combustion
chamber of an 8v. divided by 4

the cheapass in me would put a group A headgasket on it. (increase
compression by reducing distance between the block and head. Then I
would have the head decked for level within maintainance levels..
(leave room for one more decking). further reducing the overall
displacement by making z smaller in those clyn.
then you can also have the block decked maint level or otherwise.
further reducing it none of this has dorked with the combustion
chamber shape except in the z-direction

once you finally get it down to as far as you can go without doing the
piston/valve slap take your pistons down and get the valve reliefs
made deeper. I'm betting you can get a full compression point ie.
~10:1 to ~11:1 and reduce the displacement

You may have to have the tops of the pistons flycut and ceramic coated
to re-lower your compression if you have to.

Is that specific enough..
Group A headgasket is 1/2 hieght of normal..
stacked ABA gaskets work to lower compression on 16vTs..

Brian

oh does it say you have to maintain na/or forced or stock fueling?


On 10/3/06, Dan Bubb <jdbubb@verizon.net> wrote:
> OK, spell it out Brian.
> How does decking the block and pistons affect displacement?
> Special pistons? Special rods? Special crank?
>
> What cheapass-in-the-rules-plan decreases the displacement and retains any
> kind of compression ratio and combustion chamber shape appropriate for
> racing?
>
> Specifics Man!!!
> You really need to ditch the GRM rules mentality!
> Dan
>
> From: "Brian McGarvey" <bmcgarvey@gmail.com>
> Sent: Tuesday, October 03, 2006 8:21 PM
> Subject: Re: Is the 1.8 16V really 1800 cc or is it a little less?
>
>
> > Ok the rules state you cannot deck the head.. what about the block and
> > pistons to keep the compression ratio the same, but decrease the
> > displacement :-)
> >
> >
> >
> > On 10/3/06, Cory Langford <Cory_Langford@bcit.ca> wrote:
> >>
> >>
> >>
> >> Well, the rules also say I can't deck the head or change the compression
> >> ratio :(
> >>
> >> Guess that leaves the EN 1.7 with a displacement of 1715. I just hoping
> >> to
> >> have a 16V instead. I guess a 90 HP engine in a 1500 lb car is still
> >> somewhat competitive. Those Honda hatchbacks seem to dominate that class.
> >>
> >> Cory Langford
> >> 82/83/78 shells looking to become a race car 8^)
> >> 81 1.8S (for Supercharged)
> >> 78 1.9L 8V Turbo
> >> 86 2.1L 8V Turbo
> >> 68 Ghia
> >> 95 Eurovan
> >> "Brian McGarvey" <bmcgarvey@gmail.com> wrote on 03/10/2006 04:37:07 PM:
> >>
> >> > Deck the snot out of it... relief the pistons a bit more.. and you can
> >> > probably prove your under that 1750cc mark :-) and get a boost in
> >> > HP...
> >> > Bigmac..
> >> > The rules are there to be tested...
> >> >
> >> >
> >> > On 10/3/06, Cory Langford <Cory_Langford@bcit.ca> wrote:
> >> > >
> >> > >
> >> > >
> >> > >
> >> > >
> >> > > Okay, I don't have my bently handy, but I need to know what the exact
> >> > > displacement of the 1.8L 16V Scirocco engine is.
> >> > >
> >> > > Reason being, - The class cut-off I want to try and get the car into
> >> > > for
> >> > > the track is UP TO 1750 cc  the next class is 1751 to 2750.
> >> > >
> >> > > So:  is the 1.8 under 1750 or over 1750?
> >> > >
> >> >
> >>
> >
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> >
>
>
>
>