[T3] type3-vwtype3.org Digest, Vol 87, Issue 11

Jim Adney jadney at vwtype3.org
Mon Dec 11 20:24:42 PST 2017

On 11 Dec 2017 at 19:21, Keith Park wrote:

> Depends on how your engine is set up, CR etc.
> 72's in the US had dished pistons and stepped heads, it will
> run on 87, the 73's had flat tops and needed 89 in the hotter weather.
> if it doesnt knock and ping on a certain grade, there's no reason
> not to use it.

I'm pretty sure that '72s and '73s both have the dished pistons. They 
both had the reduced 7.3:1 compression ratio.

Jim Adney, jadney at vwtype3.org
Madison, Wisconsin, USA

More information about the type3-vwtype3.org mailing list