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Buying a dismantled block and head - what contents are critical?
Using 3A pistons and rods with a JH crank will reduce your displacment to
1790cc!!! You don't want to do that ;^)
But I guess you already knew that and were going to make up the difference
with boost. OH yeah!
If my calculations are correct putting the JH crank in the 3A short block
will net you a CR of 7.2:1. About right if you're the ex-Drake salesman, but
probably too low for modern engine control. Plus, you loose the all
important squish area.
Stacking head gaskets will also loose the squish area even though lots of
people do it and still get good results. It's just not optimum.
I've heard you can mill out the bowl in an ABA piston to lower the CR to
9.2. Don't know if that applies to 3A pistons or not, but you want to keep
the perimeter of the piston crown at the stock height to promote turbulence
in the combustion chamber.
Anyway, that's my plan.
Dan
----- Original Message -----
From: "Jeff Toomasson" <jtoomasson@yahoo.com>
To: "Dan Bubb" <jdbubb@ix.netcom.com>
Cc: <scirocco-l@scirocco.org>
Sent: Wednesday, October 15, 2003 1:55 PM
Subject: Re: Buying a dismantled block and head - what contents are
critical?
> Ahhh, my friend - the distributor will not be necessary (other than maybe
> recouping some costs).
>
> This motor is destined for SDS territory and the land of Coil Packs! :)
>
> But the real question is whether to mill the pistons or use a JH crank to
> reduce compression (or, I guess, cheating and stacking headgaskets!)
>
> Thanks for the info, Dan -
>
> Jeff
> ----- Original Message -----
> From: "Dan Bubb" <jdbubb@ix.netcom.com>
> To: "Jeff Toomasson" <jtoomasson@yahoo.com>; <mr.utility@highstream.net>
> Cc: <scirocco-l@scirocco.org>
> Sent: Wednesday, October 15, 2003 10:42 AM
> Subject: Re: Buying a dismantled block and head - what contents are
> critical?
>
>
> > TT sells bigger valves now but they used to make a point of the
> reliability
> > of the stock valves. My TT head was ported back in 98 and has stock
valves
> > although they are backcut. They didn't offer a bigger valve option back
> > then.
> > CIS hydro head internals should fit as far as I can tell from ETKA.
> > Make sure you get the 3A distributor for when you add a KS ignition and
> get
> > all the crap on the front of the block (not water pump and oil filter
> mount,
> > but the other stuff) , the ventilation holes are different.
> >
> > ----- Original Message -----
> > From: "Jeff Toomasson" <jtoomasson@yahoo.com>
> > To: <mr.utility@highstream.net>
> > Cc: <scirocco-l@scirocco.org>
> > Sent: Wednesday, October 15, 2003 12:28 PM
> > Subject: Re: Buying a dismantled block and head - what contents are
> > critical?
> >
> >
> > > Sorry - but I'm kinda missing your point. Are you referring to
whether
> TT
> > > offered a bigger valve combo? Also, what are these problems you're
> > > referring to? I thought Colin's heads were among the best offered by
> > anyone
> > > other than Oettinger or maybe Drake?
> > >
> > > thx, JT
> > > ----- Original Message -----
> > > From: <mr.utility@highstream.net>
> > > To: "Jeff Toomasson" <jtoomasson@yahoo.com>
> > > Cc: <scirocco-l@scirocco.org>
> > > Sent: Wednesday, October 15, 2003 9:27 AM
> > > Subject: Re: Buying a dismantled block and head - what contents are
> > > critical?
> > >
> > >
> > > > I am almost positive that they used to, but I do not know about
now...
> > > They
> > > > were much more in the market for tuners some years ago, but I think
> they
> > > have
> > > > had some trouble since, and they do not sell all of the 'go-fast
> > > internals'
> > > > they used to... The 'trouble' appears to have been too many idiots
> who
> > > > thought they knew what they were doing, and when they discovered
they
> > did
> > > not,
> > > > TT got the blame...
> > > >
> > > > HTH
> > > >
> > > > David fahrvegnugen
> > > >
> > > >
> > > >
> > > > Quoting Jeff Toomasson <jtoomasson@yahoo.com>:
> > > >
> > > > > Tomorrow, I'm most likely going to be picking up a 3A shortie and
TT
> > > head
> > > > > that've been torn apart.
> > > > >
> > > > > Other than the obvious, block, pistons, wrist pins, crank,
I-shaft,
> > > rods, is
> > > > > there anything the block must absolutely must come with? Should I
> > bring
> > > a
> > > > > micrometer to measure the pistons? Or can I just insert them
through
> > the
> > > bore
> > > > > to verify fit?
> > > > >
> > > > > As for the head, it's supposedly a TT ported hydro 8v head from a
> Digi
> > > II
> > > > > setup, but the running gear is missing. I assume I can use the
gear
> > from
> > > my
> > > > > CIS hydro head? IIRC, TT did _not_ use oversize valves like
> Eurospec
> > > and
> > > > > Oettinger - just the typical 40/36 GTi combo. Is that true?
> > > > >
> > > > > Thanks,
> > > > >
> > > > > Jeff
> > > > > _______________________________________________
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> > > > > Scirocco-l@scirocco.org
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> > > > >
> > > >
> > > >
> > >
> > >
> > > _______________________________________________
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> >
> >
> >
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