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Fw: 2.oL
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<DIV><FONT face=Arial size=2><FONT size=3>What about (if your stuck on using the
aba block) using 16v 2.0L pistons? May be the easiest way to bring the
comp. back up!!</FONT></FONT></DIV>
<DIV><FONT face=Arial size=2><FONT size=3></FONT></FONT> </DIV>
<DIV><FONT face=Arial size=2><FONT
size=3>Dave</FONT><BR></DIV></FONT>>Scott,<BR>><BR>>I am in the middle
of doing this now. I just bought an ABA block, pulled<BR>>the head off
my 1.8 16V donor motor and am preparing to make it all work.<BR>><BR>>It
is obvious that the gear on the top of the oil pump, the
intermediate<BR>>shaft and the crankshaft timing belt gear all have to be
swapped from the<BR>>donor 16V block to the ABA as there is no ditributor to
drive the oil pump<BR>>on a 16V car and the timing belt gears are much wider
for the 16V timing<BR>>belt. The ABA block has a much better oil pump
so I am trying to take it<BR>>apart and just swap in the top gear part.
The 16V block has a cool aluminum<BR>>crankcase breather whereas the ABA has
a cheapo plastic one so I am swapping<BR>>out the breather
also.<BR>><BR>>When you look at a 16V block and the ABA block side by
side, there is a huge<BR>>difference in pistons. The 16V pistons are
almost flat, with a little "V"<BR>>in the top for the exaust valves
to "clear". The pistons also come up just<BR>>over the top of
the block when at the top of the stroke. The entire<BR>>combustion
chamber for the 16V is in the head. The ABA pistons are
slightly<BR>>dished on top and leave about 2mm of space when at the top of
the stroke and<BR>>the head has a much smaller combustion chamber than the
16V. (I don't know<BR>>if this means that a 16V head on the ABA block
is not an interference motor<BR>>or not. I will have to loosely bolt
the head on and try to turn the cams to<BR>>see).<BR>><BR>>I believe
what all this means is that in order to raise compression you will<BR>>have
to "shave" the 16V head to maximum amount to get compression over
9:1<BR>>and use a thinner headgasket if one is available. I am still
looking into<BR>>this. Forged pistons aren't an option for me
either.<BR>><BR>>I am now struggling with how to set it up to run P/S
without the A/C which<BR>>is a whole nuther hassle to find the right brakets
although I hear that<BR>>there were some Audi's imported with no A/C and
power steering and those<BR>>brakets might be available in wrecking yards in
parts of the country where<BR>>A/C isn't a necessity. (anyone got one of
these...or got access to yards<BR>>that might have them???)<BR>><BR>>I
don't think that if you are using the stock 16V intake manifold, that
you<BR>>will any fitment problems. The extra 16mm of height shouldn't
interfere<BR>>with the hood and there is plenty of clearance for the throttle
body from<BR>>the rain tray. You will need to run a CIS-E setup and
probably the knock<BR>>sensor ignition if you get the compression above
9.5:1<BR>><BR>>Hope this helps<BR>><BR>>Brian Honnold<BR>>'78
Ragtop<BR>><BR>><BR>>> -----Original Message-----<BR>>> From:
Majordomo [<A
href="mailto:majord@neubayern.net">mailto:majord@neubayern.net</A>]On Behalf Of
Scott Williams<BR>>> Sent: Sunday, October 03, 1999 5:14 AM<BR>>>
Subject: Re: 2.oL<BR>>><BR>>><BR>>> It seems that I may be
able to easily sell both my old 1.8l 16v shortblock<BR>>> *and* the 2.0l
16v block that I bought back in July. So, I've been<BR>>> considering
going the ABA tallblock route for some more power. Yeah, it'll<BR>>> take
some extra figgerin' with the belts, pullys, and stuff, but<BR>>> there
seems<BR>>> to be a bit more power and smoothness
potential.<BR>>><BR>>> Share some thoughts on this, please? The
compression would have to be<BR>>> increased, too. I'm going all motor
right now, so the 8:1 that I'd be left<BR>>> with by just mating the 8v
ABA block with a 16v head is not going to be<BR>>> enough. Any ideas? I
figure that it'll have to be done in either<BR>>> the pistons<BR>>>
or the head. I'm *not* going to install forged pistons and the expense
is<BR>>> more than I can handle in the first place.However, is decking the
head to<BR>>> that extent safe or even optimal for that
matter?<BR>>><BR>>> As for the hood clearance, I've got a guy who
can help me adapt<BR>>> the throttle<BR>>> body/intake plenum to
fit. Hell, he's made a few 16v turbo kits in his<BR>>> backyard; this
should be easy! Well, lemme know. Peace...<BR>>> --<BR>>> Scott F.
Williams<BR>>> NJ Scirocco nut<BR>>> SCCA ProRally
driver<BR>>> Hotrod Rabbit
GTi<BR>>><BR>>><BR>>><BR>>> --<BR>>> Email
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href="mailto:scirocco-l-probs@scirocco.org">scirocco-l-probs@scirocco.org</A>
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