[tech] similarities b/w 7a & 3b

[Nate Stuart]

> <<But my brain has been cranking the gears, and I'd like to bounce a
couple of thoughts off of those that might know.
>
> Does the 7A and 3B have the same bore? (i.e. could I use 3b pistons in my
7a
> motor to get the correct CR. this assumes the heads are identical)>>
>
> The heads are identical regarding fittament and bore/stroke stuff, the
bores are different, however, 81mm vs. 82.5mm.  The only way to lower
compression is to use a different piston, and nothing Audi that I know of
will "bolt in", some VW pistons that Alex. VG just got would though, they
have 82.5mm bore and 8.5:1 comp.
>

In regards to those pistons that Alex got. The shop he ordered them from is
not even 5 min from where I work. The addy is www.eurospeedltd.com and I can
check confirm anything there that anybody needs.

Later!
-Nate
'89 90q
'87 5ktq (donor)
'86 5kt (another donor?!)