I haven't gone the full Weber route, but based on what I have done (header
exhaust system) and some logical extrapolation, here's my $0.02: (By the
way, I got most of the bang for a lot fewer $ by going with a header,
free-flow exhaust, and readjusting the Stromberg to suit. I'm still
tweaking things, but I'm pretty happy with it.)
Remove:
Air Pump and associated plumbing. Note: Some years have the air pump line
going to the exhaust manifold, which you'll be replacing with a header. No
problem there. However, other years have a connection to each exhaust port
in the head, which have to be plugged individually. Your '78 might be one
of these. Best to check and, if you need them, get the appropriate
threaded plugs beforehand.
EGR valve and associated plumbing, which will go away when you do the Weber
conversion anyway, as you'll be replacing the intake manifold. (If you do
keep the Stromberg, you'll have to work out a plug for the intake manifold
where the EGR attaches.)
Maybe remove:
Carbon canister and associated plumbing. whether you actually do will
depend on the Weber setup. You may want to keep it just to have someplace
to connect the float bowl vent (if any) to, and to keep gasoline fumes out
of the cockpit. I would say keep it, others may advise differently.
(Definitely keep it if you keep the Stromberg.)
Keep at all costs:
The PCV system (the vent line connection between the valve cover and the
carb or air cleaner). The 1500 seems to depend on this set-up keeping a
slight vacuum in the crankcase. Otherwise it will leak oil like crazy from
unexpected places, and replacing seals will not solve it.
Good luck with the changes, and let me know what the result is.
Chris Kotting
ckotting@iwaynet.net
-----Original Message-----
From: Nolan, Michael F. [SMTP:MICHAEL_NOLAN@cuusa.com]
Sent: Tuesday, November 25, 1997 1:50 PM
To: 'spridge'
Subject: Emissions stuff
I currently have a 78 Midget 1500. I plan on converting to a Weber
Downdraft carb. I also plan on removing cat (no smog law) and replacing
with headers and free flow exhaust. The question is
What can be removed (pollution stuff) when I convert and is there
anything I have to plug/add ???
Thanks,
Mike
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