ABF vs ABA with 16V head...

[jdbubb@ix.netcom.com (Dan Bubb)]

I would suggest you look at the head and decide if you can cut off 2mm
and keep the intake valve seats intact. I would also suggest that
removing 1mm off the block will cause the piston hit the head. It may
not hit it turning it over by hand, but at 7000 RPM as the rod stretches
and the bearing clearances are absorbed it WILL smack the shit out of
it.
Dan

Marc Peterson wrote:
> 
> OK, but if I shave the head down 2 mm and remove 1 mm off the block, then i
> should be back near 10:1...
> 
> hmm...
> 
> Marc
> ----- Original Message -----
> From: BHonnold
> To: scirocco-l@scirocco.org
> Sent: Thursday, February 14, 2002 1:40 AM
> Subject: RE: ABF vs ABA with 16V head...
> 
> 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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