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ABF vs ABA with 16V head...
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Yes there are significant differences between the euro only ABF motor and a
US ABA. The ABF uses the 16v lower crank pulley, intermediate shaft and oil
pump. Of course the ABF also has 16v pistons where the ABA is 8V. When you
put a 16v head on a US ABA block you get 8:1 compression....not good for
anyting at all but losing races to every honda you meet.
To bring compression back up you can do several things. Source out ABF
pistons, pay $500+ for custom forged pistons, or rebush the ABA rods to use
2.0 16v pistons and wrist pins from a 9A block and get back to 9.25:1
compression and then use a thinner Headgasket to get back to the 10.25:1 of
an ABF motor.
The ABF also has a better higher flowing head, different cams, better
flowing intake manifold and a single butterfly TB.
HTH
Brian H
-----Original Message-----
From: scirocco-l-admin@scirocco.org
[mailto:scirocco-l-admin@scirocco.org]On Behalf Of Marc Peterson
Sent: Wednesday, February 13, 2002 8:34 PM
To: scirocco-l@scirocco.org
Subject: ABF vs ABA with 16V head...
Is this just a matter of shaving the head/decking the block to bring the
compression back up, or are there other differences between the two...(basic
mechanical issues, I know engine management is different)
Cause I just happen to know where there is a ABA and a wrecked 2.0 Jetta
GLI 16V...
Marc
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<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN =
class=3D715053606-14022002>Yes=20
there are significant differences between the euro only ABF motor and a =
US=20
ABA. The ABF uses the 16v lower crank pulley, intermediate shaft =
and oil=20
pump. Of course the ABF also has 16v pistons where the ABA is =
8V. =20
When you put a 16v head on a US ABA block you get 8:1 compression....not =
good=20
for anyting at all but losing races to every honda you meet. =20
</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D715053606-14022002></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN =
class=3D715053606-14022002>To=20
bring compression back up you can do several things. Source out =
ABF=20
pistons, pay $500+ for custom forged pistons, or rebush the ABA rods to =
use 2.0=20
16v pistons and wrist pins from a 9A block and get back to 9.25:1 =
compression=20
and then use a thinner Headgasket to get back to the 10.25:1 of an ABF=20
motor.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D715053606-14022002></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN =
class=3D715053606-14022002>The=20
ABF also has a better higher flowing head, different cams, better =
flowing intake=20
manifold and a single butterfly TB.</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D715053606-14022002></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D715053606-14022002>HTH</SPAN></FONT></DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN=20
class=3D715053606-14022002></SPAN></FONT> </DIV>
<DIV><FONT face=3DArial color=3D#0000ff size=3D2><SPAN =
class=3D715053606-14022002>Brian=20
H</SPAN></FONT></DIV>
<BLOCKQUOTE dir=3Dltr style=3D"MARGIN-RIGHT: 0px">
<DIV class=3DOutlookMessageHeader dir=3Dltr align=3Dleft><FONT =
face=3DTahoma=20
size=3D2>-----Original Message-----<BR><B>From:</B>=20
scirocco-l-admin@scirocco.org =
[mailto:scirocco-l-admin@scirocco.org]<B>On=20
Behalf Of </B>Marc Peterson<BR><B>Sent:</B> Wednesday, February 13, =
2002 8:34=20
PM<BR><B>To:</B> scirocco-l@scirocco.org<BR><B>Subject:</B> ABF vs ABA =
with=20
16V head...<BR><BR></FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Is this just a matter of shaving the =
head/decking=20
the block to bring the compression back up, or are there other =
differences=20
between the two...(basic mechanical issues, I know engine management =
is=20
different)</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Cause I just happen to know where =
there is a ABA=20
and a wrecked 2.0 Jetta GLI 16V...</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial =
size=3D2>Marc</FONT></DIV></BLOCKQUOTE></BODY></HTML>
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