Jonathan,

Thank you for the link - interesting read, and it did
explain quite a bit.  I need to look at how the vacuum
hoses are routed again to really understand how that
applies to my van.

When i installed the new engine in my van, i went with
the larger later model throttle body with only one
vacuum port.  This meant that i had to change the
vacuum hose layout to that of the '85 model as listed
in the bentley.  I can't help but wonder if this
messes with the vacuum signal when compared to the
earlier throttle body with 2 vacuum ports.  I've never
been 100% comfortable with this change.

Also, is the side of vac canister closer to the
distributor the advance or retard?

The reason i am curious about all this is that i have
noticed a bit of pinging in the engine under lower RPM
higher load conditions, and am trying to figure out if
the timing curves are all messed up from running a
larger displacement engine with big valves and a
different throttle body...  I am beginning to think
the engine is pulling a lot more vacuum (need to get a
guage) which is advancing the timing too much and
causing the ping.

Thanks for the reply, Jonathan,
-Damon

--- Jonathan Farrugia <jfarrugi@umich.edu> wrote:
>
> for the data see section 1.14
> http://www.ratwell.com/technical/FAQ/FAQContent.html

'84 Westy "The Van" w/2.3L WBX
Vancouver, BC

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