Re: 2.0L 8v Questions

[Doctor Dubsalot <v_dublover@yahoo.com>]

My good fellow: 
As i'm sure you know, the JH and RD cylinder heads are
almost identical except for one key feature... The RD
head is Hydraulic. Using the hydraulic head will allow
one to utilize a knock sensing ignition system from
say, an 85 golf gti. With this setup, you can run your
high compression ABA bottom end without worries of
detonation. It is true that a JH head will work just
fine, but it is also true that on that hot, summer
day, under heavy load, detonation is always a risk,
even with higher octane fuels. Ever seen the results
of a detonation damaged piston? A knock sensor system
doesn't work well with a solid lifter engine due to
it's confusing lifter clatter with detonation. I hope
this answers your question. Happy dubbing and
Christmas!
Dr. Dubsalot




--- Chris DeLong <green536@hotmail.com> wrote:
> Dr. in your prefessional opinion please explain how
> you imagine that a JH 
> head would be lesser to an RD head.
> 
> 
> >From: Doctor Dubsalot <v_dublover@yahoo.com>
> >To: scirocco8valve@yahoo.com
> >CC: scirocco-l@scirocco.org
> >Subject: Re: 2.0L 8v Questions
> >Date: Mon, 17 Dec 2001 21:17:19 -0800 (PST)
> >
> >Hey. A suggestion:
> >Search around in local wrecking yards for a low to
> mid
> >mile 2.0L engine from an A3 golf or jetta. You can
> >slap on your JH engine's head or better yet, an RD
> >head with hydraulic lifters. This second option
> will
> >allow the use of an 85-89 golf GTI 8v knock sensing
> >ignition system. You can easily switch the guts
> from
> >the RD distributor into the ABA engine's
> distributor
> >to run the knock sensing ignition. bolt on all your
> >scirocco accessories, and A) use the Techtonics
> >tallblock dual downpipe or B)have an exhaust
> manifold
> >spacer made up and use longer studs to make up for
> the
> >taller block. I wouldn't bother with any rebuilding
> if
> >you can find an engine with less than 100k miles.
> Jam
> >in a good sport cam, a couple degrees advance cam
> >timing and cool air induction (super, SUPER
> important)
> >and you'll have a considerably powerful car. Next,
> >have the ABA head ported, have a machine fit it out
> >for CIS injectors, and slam that badboy in you car.
> >It's been said that an ABA head will outflow a
> >decently ported JH/RD head.  Good Luck!
> >Dr. Dubsalot
> >
> >--- Robbie MacDonald <scirocco8valve@yahoo.com>
> wrote:
> > > i have been thinking of upgrading my engine to
> 2.0l
> > > how much would i be looking to spend on a 2.0
> bottom
> > > end with parts for rebuild?  Does anyone have or
> > > know
> > > of one for sale? TIA
> > > -Robbie
> > >
> > >
> > > =====
> > > Robbie MacDonald
> > > robbiemacdonald@hotmail.com
> > > scirocco8valve@yahoo.com
> > > Seattle, WA USA
> > > '85 8v scirocco
> > >
> > >
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> 
> 
> 
> Chris DeLong
> ICQ#45030867
> Seattle, WA USA
> '80 16V 'Rocco ragtop
> '91 GLi 2.0 16V
> '77 Rabbit 16V
> '80 'Vert (parting out!)
> '61 17 Window type II
> '91 Vanagon
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> 
> 
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